EP3941833A1 - Système et méthode d'analyse d'orbites de satellites - Google Patents
Système et méthode d'analyse d'orbites de satellitesInfo
- Publication number
- EP3941833A1 EP3941833A1 EP20848846.0A EP20848846A EP3941833A1 EP 3941833 A1 EP3941833 A1 EP 3941833A1 EP 20848846 A EP20848846 A EP 20848846A EP 3941833 A1 EP3941833 A1 EP 3941833A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- observed
- satellite
- satellites
- orbital
- parameters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G3/00—Observing or tracking cosmonautic vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/24—Guiding or controlling apparatus, e.g. for attitude control
- B64G1/244—Spacecraft control systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/933—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of aircraft or spacecraft
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/003—Transmission of data between radar, sonar or lidar systems and remote stations
Definitions
- the present invention relates to an advanced system and method for analyzing satellite orbits. More particularly, the invention relates to a system and a method for establishing similarities between observed satellites.
- Spatial listening sensors generally return a large amount of data relating to the orbital parameters of the observed satellites, such as the position and speed of the observed satellites.
- the determination of the orbital parameters of the observed satellites generally makes it possible to calculate the orbital trajectory of each satellite.
- the present invention aims to remedy these drawbacks with a completely innovative approach.
- the present invention relates to an orbital data processing device configured to be in communication with spatial listening sensors; the processing device comprising a calculation unit configured to determine the orbital parameters of the observed satellites and to determine a coefficient of orbital similarity per pair of satellites observed according to the degree of resemblance of the determined orbital parameters of the observed satellites of each pair.
- the invention is implemented according to the embodiments and variants set out below, which are to be considered individually or in any technically operative combination.
- the data processing device may include a time counting unit configured to date the orbital parameters according to the date of passage of the satellites observed in the listening field of the listening sensors; a computer server comprising a database of listed satellites each comprising an identifier associated with intrinsic identification parameters and dated orbital parameters; and a satellite identification unit electrically connected to the computing unit and to the computer server, the identification unit being configurable to attribute to each observed satellite, the dated orbital parameters of which correspond by orbital analogy to the orbital parameters of same date of a listed satellite, the identifier of said listed satellite; and to assign each observed satellite, whose dated orbital parameters do not correspond by orbital analogy to the orbital parameters of the same date of a listed satellite, an observed unrecognized satellite status.
- the identification unit can be configured to define an immediate neighborhood area around each observed unrecognized satellite, said immediate neighborhood area comprising a plurality of identified observed satellites; and to determine for each unrecognized observed satellite a particular characteristic of intrinsic identification parameters associated mainly with the identified observed satellites included in the immediate neighborhood area.
- the calculation unit can be configured to determine a list of orbital parameters for each observed satellite identified, the list of orbital parameters comprising the orbital parameters determined according to different dates; the determination of the orbital similarity coefficient per pair of observed satellites identified that can be determined according to the degree of resemblance of the lists of determined orbital parameters of the identified observed satellites of each pair.
- the present invention relates to a satellite orbital analysis system comprising the data processing device described above as well as the spatial listening sensors configured to observe the satellites in orbit. during their passage in the listening field of the sensors.
- the invention is implemented according to the embodiments and variants set out below, which are to be considered individually or in any technically operative combination.
- the data processing device of the satellite orbits analysis system can comprise a time counting unit configured to date the orbital parameters according to the date of passage of the satellites observed in the listening field of the listening sensors; a computer server comprising a database of listed satellites each comprising an identifier associated with intrinsic identification parameters, and dated orbital parameters; a satellite identification unit electrically connected to the computing unit and to the computer server, the identification unit being configurable to attribute to each observed satellite, the dated orbital parameters of which correspond by orbital analogy to the orbital parameters of the same date of a listed satellite, the identifier of said listed satellite; to assign to each observed satellite, whose dated orbital parameters do not correspond by orbital analogy to the orbital parameters of the same date of a listed satellite, an unrecognized observed satellite status; to define an immediate neighborhood area around each unrecognized observed satellite, said immediate neighborhood area comprising a plurality of identified observed satellites; and to determine for each unrecognized observed satellite a particular characteristic of intrinsic identification parameters associated mainly
- the system can further comprise a display device electrically connected to the identification unit, the device for visualization configurable to symbolically display at least a plurality of observed satellites identified relative to their orbital position; to symbolically display a particular characteristic of the same category of intrinsic identification parameters associated with each observed satellite identified and displayed; to symbolically display the observed unrecognized satellites; to determine an immediate neighborhood area around each observed unrecognized satellite; said immediate neighborhood area comprising a plurality of identified observed satellites; and to symbolically display the particular characteristic determined at each observed unrecognized satellite displayed.
- a display device electrically connected to the identification unit, the device for visualization configurable to symbolically display at least a plurality of observed satellites identified relative to their orbital position; to symbolically display a particular characteristic of the same category of intrinsic identification parameters associated with each observed satellite identified and displayed; to symbolically display the observed unrecognized satellites; to determine an immediate neighborhood area around each observed unrecognized satellite; said immediate neighborhood area comprising a plurality of identified observed satellites;
- the present invention relates to a method of analyzing satellite orbits implemented by the analysis system described above, the method comprising a step of observing satellites in orbit. around a star during their first passage in a listening field of at least one spatial listening sensor; a step of determining the orbital parameters of the observed satellites; and a step of determining an orbital similarity coefficient per pair of observed satellites according to the degree of resemblance of the determined orbital parameters of the observed satellites of each pair.
- the invention is implemented according to the embodiments and variants set out below, which are to be considered individually or in any technically operative combination.
- the analysis method for which the processing device can comprise a database of listed satellites each comprising an identifier and dated orbital parameters, can include a step of dating the orbital parameters of each satellite observed according to the date of passage of each satellite observed in the listening field of the spatial listening sensors; a step of assigning to each observed satellite, the dated orbital parameters of which correspond by orbital analogy to the orbital parameters of the same date of a listed satellite, the identifier of said listed satellite; and a step of attribution to each observed satellite, whose orbital parameters dated do not correspond by orbital analogy to the orbital parameters of the same date of a listed satellite, an unrecognized observed satellite status.
- the analysis method may include a step of determining a list of orbital parameters for each observed satellite identified, the list of orbital parameters comprising the orbital parameters determined according to different dates; the step of determining the orbital similarity coefficient per pair of identified observed satellites can be a determination according to the degree of resemblance of the lists of determined orbital parameters of the observed satellites of each pair.
- the analysis method may include a step of defining an immediate neighborhood area around each observed unrecognized satellite; said immediate neighborhood area comprising a plurality of identified observed satellites; and a step of determining, for each unrecognized observed satellite, a particular characteristic of intrinsic identification parameters associated mainly with the identified observed satellites included in the immediate neighborhood area.
- the step of defining each immediate neighborhood zone may include a display step on the viewing device, symbolically, of at least a plurality of observed satellites identified relative to their orbital position and unrecognized observed satellites; and a step of determining, according to the display step, each immediate neighborhood area around each unrecognized satellite.
- FIG. 1 is a schematic perspective view of a satellite orbital analysis system according to the invention.
- Figure 2 is a schematic view of the orbital analysis system including a first visualization of the analysis of satellite orbital data.
- Figure 3 is a schematic view of the orbital analysis system including a second visualization of the analysis of satellite orbital data.
- Figure 4 is a view of a flowchart of a method for analyzing orbits of satellites orbiting the Earth.
- FIG. 5 is a view of a flowchart of a method for defining an immediate neighborhood area around observed unrecognized satellites.
- a system 10 for analyzing orbits of satellites 12, 14, 16, 18, 20 is shown.
- the analysis system 10 is configured to observe a plurality of artificial satellites 12, 14, 16, 18, 20 orbiting a star 22, in this case around the Earth.
- the analysis system 10 comprises an orbital data processing device 30 in communication with spatial listening sensors 24, 26, 28 configured to observe the satellites 12, 14, 16, 18, 20.
- the satellites 12, 14, 16, 18, 20 in Earth orbit are observed by the space listening sensors 24, 26, 28.
- the spatial listening sensors 24, 26, 28 may include, for example and without limitation, radiofrequency radar antennas or else optical sensors such as cameras or even telescopes.
- the space monitoring sensors 24, 26, 28 can be arranged both on Earth and on space surveillance satellites in Earth orbit, preferably geostationary orbit. Spatial listening sensors 24, 26, 28 make it possible to determine dynamic parameters of satellites 12, 14, 16, 18, 20 called orbital parameters.
- the spatial listening sensors 24, 26, 28 allow the acquisition of orbital positions and speeds of satellites 12, 14, 16, 18, 20 observed during their passage in the listening field 27, 29, also called field of vision.
- the orbital parameters of each satellite 12, 14, 16, 18, 20 can include the position and the speed of each satellite 12, 14, 16, 18, 20 observed, the temporal evolution or temporal function of the position and the speed determined during the passage of each satellite 12, 14, 16, 18, 20 in the listening field 27, 29 of one of the sensors 24, 26, 28 for spatial listening.
- the spatial listening sensors 24, 26, 28 are in communication with the orbital data processing device 30 so that the orbital parameters are determined by the orbital data processing device 30 receiving the signals from the sensors 24, 26, 28 spatial listening.
- the orbital parameters are characterized by position vectors and velocity vectors defined in three dimensions of space.
- the orbital data processing device 30 makes it possible to process both radiofrequency signals originating from spatial listening sensors 24, 26, 28 of radiofrequency antenna types as well as captures of images or videos originating from optical sensors.
- the space listening sensors 24, 26, 28 can be in communication with the orbital data processing device 30 both by radiofrequency link, essentially for the space listening sensors 24, 26, 28 on board in Earth orbit, as well as in wired communication mainly for the space listening sensors 24, 26, 28 on Earth.
- Each satellite 12, 14, 16, 18, 20 observed can be characterized by its orbital parameters.
- a list of orbital parameters comprises at least a first set of orbital parameters determined during a first passage of a satellite 18 in the listening field 27, 29 of one of the sensors 26, 28 listening spatial and a second set of orbital parameters determined during a second passage of the same satellite 18 in the listening field 27, 29 of one of the sensors 26, 28 of spatial listening.
- Each passage of a satellite 12, 14, 16, 18, 20 observed in the listening field 27, 29 of one of the spatial listening sensors 24, 26, 28 is dated.
- the device 30 for processing orbital data from the satellites 12, 14, 16, 18, 20 observed is interfaced with a display device 72 configured to display at a given moment relating to the date of passage of the satellites 12, 14, 16, 18, 20 observed in the listening field 27, 29 of the spatial listening sensors 24, 26, 28, without limitation and symbolically, at least a plurality of satellites 12, 14 , 16, 18, 20 observed according to their orbital position relative to at least a portion of the star 22 around which they are in orbit, the star 22 shown being in this case the Earth.
- the orbital data processing device 30 is also connected to the various spatial listening sensors 24, 26, 28.
- the orbital data processing device 30 comprises a computing unit 60, preferably comprising memory 62.
- the computing unit 60 is configured to determine the orbital parameters of the satellites 12, 14, 16, 18, 20 observed by the spatial listening sensors 24, 26, 28.
- the determined orbital parameters are stored in the memory 62.
- the orbital data processing device 30 also comprises a time counting unit 61 configured to date the determined orbital parameters according to the date of passage of the satellites 12, 14, 16, 18, 20 observed in the listening field 27, 29 of one of the spatial listening sensors 24, 26, 28.
- the orbital data processing device 30 also comprises a computer server 64 comprising in particular a database 66 or catalog listing identified satellites and their list of predetermined orbital parameters according to predetermined dates.
- An identified satellite is a satellite comprising a satellite identifier, such as a code, a name or even a serial number making it possible to recognize the satellite from among a plurality of satellites.
- Each identifier of a listed satellite is also associated with intrinsic identification parameters relating to the satellite.
- the intrinsic identification parameters include several categories of parameters such as, for example and without limitation, a category called satellite mission, a category called satellite operator, or a category called satellite manufacturer.
- Each category of parameters includes a particular characteristic of the satellite.
- the satellite mission category may include a particular characteristic known as an observation mission, or even a particular characteristic known as a telecommunications mission.
- the so-called satellite operator category may include several specific characteristics designating satellite operators.
- the so-called satellite constructor category may include several particular characteristics designating satellite constructors.
- each satellite comprising an identifier and also characterized by its mission, its operator and its manufacturer.
- the identified satellites listed in the database 66 also each include their lists of predetermined orbital parameters, each list of orbital parameters comprising predetermined orbital parameters according to predetermined dates.
- the orbital data processing device 30 also comprises a man-machine interface 68 configured to control the information displayed on the display device 72, and a graphic interface module 70 configured to control the graphic display of the display device. visualization 72.
- the computer server 64 is configured to make it possible to identify the satellites 12, 14, 16, 18, 20 observed by their orbital parameters.
- the database 66 is in communication with the computing unit 60 so that the orbital parameters of the satellites 12, 14, 16, 18, 20 observed can be compared with the orbital parameters of the satellites listed in the base. data 66. More particularly, the computer server 64 is configured to perform a recognition of each satellite 12, 14, 16, 18, 20 observed whose orbital parameters, determined during a passage in the listening field 27, 29 of one of the sensors 24, 26, 28 of spatial listening, correspond by orbital analogy to the orbital parameters of a satellite listed according to the same date of passage.
- the processing device 30 makes it possible to assign to the satellites 12, 14, 16 observed whose dated orbital parameters correspond by orbital analogy to the orbital parameters of the same date of a listed satellite, the identifier of said satellite listed, the identifier being associated with the intrinsic identification parameters of the listed satellite.
- the recognition by orbital analogy can consist, for example and in a nonlimiting manner, from the orbital parameters of an observed satellite 16, to determine its orbital trajectory and its speed according to a date of passage and to compare its orbital trajectory and its speed with the satellites listed on the same date. If the trajectories and speeds are identical between the observed satellite 16 and the satellite listed according to the same date, the observed satellite 16 is assigned the same identifier as said listed satellite.
- the processing device 30 is configured to attribute to these satellites 18, 20 observed a status of satellites 18, 20 observed not recognized.
- each satellite shown 12, 14, 16, 18, 20 being displayed on the display device 72 in a perspective position of the terrestrial globe representative of their orbital position at a given instant relating to the date of passage of the plurality of satellites 12, 14, 16, 18, 20 observed in the field of listen 27, 29 of the spatial listening sensors 24, 26, 28.
- Each satellite 12, 14, 16, 18, 20 observed is represented according to a predefined symbolism comprising a common symbol and an identification symbol 38, 40, 42, 44, 46, 47.
- the common symbol representing an observed satellite 12, 14, 16, 18, 20 is a circle.
- the identification symbols 38, 40, 42, 44, 46, 47 displayed are representative of the particular characteristics of a single category of intrinsic identification parameters.
- the particular characteristics of a category are represented by patterns arranged inside the circles representing the satellites 12, 14, 16 observed.
- the diversity of the identification symbols 38, 40, 42, 44, 46, 47 may correspond to a diversity of mission, or of operator or even of manufacturer of the satellites.
- the information displayed on the display device 72 can be under the control of an operator having the man-machine interface 68 configured to control the displayed information.
- the man-machine interface 68 can thus be configured to select, for example and in a non-limiting manner, the portion of the terrestrial globe shown, the various satellite display and identification symbols to be used, and above all the date and time. instant at which satellites 12, 14, 16, 18, 20 were observed. It is also possible to be able to display a prediction of the positions of the satellites 12, 14, 16, 18, 20 observed by forecasting their trajectory according to the orbital parameters characterizing them.
- the man-machine interface 68 can be configured to select the display of the mission of the satellites 12, 14, 16, 18, 20 observed displayed and to select different patterns such as, for example without limitation, circles concentric with the circle symbolizing the satellites 12, 14, 16, 18, 20 observed for an observation mission, such as oblique hatching for a telecommunication mission, as well as other patterns for other missions.
- the symbols of the observed satellites 12, 14, 16, 18, 20 shown are interconnected, at least by pair of satellites 16, 18, by orbital similarity symbols 48, 50, 52, 54 shown, in a nonlimiting manner, by a continuous line of variable thickness.
- the orbital similarity symbols 48, 50, 52, 54 are representative of an orbital similarity coefficient, preferably normalized from 0 to 100%, evaluated according to the resemblances in dynamic behavior between the satellites 12, 14, 16, 18, 20 observed.
- the orbital similarity coefficient between each pair of satellites 16, 18 observed is determined from the orbital parameters of said pair of satellites 16, 18 observed or even from the lists of orbital parameters of said pair of satellites 16, 18 observed.
- the orbital similarity coefficient is preferably evaluated by the calculation unit 60 according to the degree of similarity between the orbital parameters or between the lists of orbital parameters of the pairs of satellites 16, 18 observed.
- the representation of the orbital similarity symbol 48, 50, 52, 54 is under the control of the man-machine interface 68, so as to be able to define the orbital similarity symbol and also its variants according to its value or according to different ranges of values of the orbital similarity coefficient.
- the orbital similarity symbol 48 can also be a linked dotted line arranged between two symbols of pair of satellites 16, 18 observed, the spacing of the dotted lines may be representative of the value of the coefficient. of orbital similarity.
- Figure 3 differs from Figure 2 in that the observed satellites 18, 20 represented by their common symbol, in this case a circle, not comprising identification symbols 38, 40, 42, 44, 46, 47 on FIG. 2, include, in FIG. 3, an identification symbol 44, 47.
- identification symbols 44, 47 have been allocated to the satellites 18, 20 observed not recognized by orbital analogy of their orbital parameters with the orbital parameters of the satellites listed.
- each identification symbol 44, 47 assigned to each observed satellite 18, 20 not recognized is the same identification symbol 44, 47 as that attributed to the majority of the satellites 16, 18, 21 observed identified whose displayed orbital position is included in an immediate neighborhood zone 57, 58 defined around the symbol of each satellite 18, 20 observed and not recognized.
- the immediate neighborhood area 57, 58 is a restricted area comprising the identified observed satellites 16, 18, 21 whose orbital position is in the immediate vicinity of the observed unrecognized satellite 18, 20. More particularly, one can define an observed satellite 16 identified in close proximity relative to an observed satellite 18 not recognized as being the observed satellite 16 identified closest to the observed satellite 18 not recognized according to a particular direction and angle of observation from the satellite 18 observed not recognized.
- the attribution of an identification symbol 44, and therefore of a particular characteristic to a category of intrinsic parameters for the identification of an observed unrecognized satellite 18 may be according to a first embodiment, due to the fact of the analysis of an operator observing the display of the display device 72 of FIG. 2, who, through his experience and by means of the man-machine interface 68, assigns an identification symbol 44. From preferably the operator determines an identification symbol 44 for the observed satellite 18 previously unrecognized according to a criterion for which the identification symbol 44 present in the majority in the immediate neighborhood zone 57 around the observed satellite 18 not recognized is the symbol of identification 44 to be assigned to the observed unrecognized satellite 18.
- an algorithm for determining an identification symbol 44 of an observed unrecognized satellite 18 can be implemented in the computing unit 60 or in the man-machine interface 68.
- the determination algorithm can include steps making it possible to determine or identify the identification symbol 44 used in the majority in the immediate neighborhood area 57 around the observed satellite 18 not recognized and to assign this identification symbol 44 to satellite 18 previously observed unrecognized.
- the determination algorithm can either directly assign the determined symbol, or leave the choice, via the man-machine interface 68, to an operator to assign the identification symbol thus determined or not to the satellite 18 observed not recognized.
- a choice relating to the immediate neighborhood zone 57 around an observed unrecognized satellite 18 can also be offered to the operator via the man-machine interface 68.
- the attribution of an identification symbol 44, and therefore of a particular characteristic to a category of intrinsic identification parameters to each satellite 18, 20 observed not recognized can to be carried out by the man-machine interface 68.
- the man-machine interface 68 is configured to define an immediate neighborhood zone 57 around each satellite 18, 20 observed and not recognized, the immediate neighborhood zone 57 comprising a plurality of observed satellites 12, 14, 16 identified, and to determine for each satellite 18, 20 observed not recognized a particular characteristic of intrinsic identification parameters associated mainly with the identified satellites included in the immediate neighborhood area 57.
- the display device 72 can cooperate with the man-machine interface 68 to assign an identification symbol 44 to an observed satellite 18 that is not recognized.
- the display device 72 can be configured to symbolically display at least a plurality of the observed satellites 12, 14, 16 identified relative to their orbital position; symbolically displaying a particular characteristic of the category of intrinsic identification parameters selected associated with each satellite 12, 14, 16 observed identified displayed; and symbolically displaying the observed satellites 18, 20 not recognized.
- the technical objective of this display is to be able to determine the particular characteristic relating to the category of intrinsic identification parameters selected for each satellite 18, 20 observed and not recognized.
- the display device 72 is configured to selecting or determining an immediate neighborhood area 57, 58 at each satellite 18, 20 observed unrecognized, and around each satellite 18, 20 observed unrecognized, each immediate neighborhood area 57, 58 comprising a plurality of satellites 12, 14, 16 observed identified.
- the determination of the immediate neighborhood area 57 can be carried out in several ways.
- a visual analysis by an operator can allow the determination and manual acquisition of information relating to the immediate neighborhood areas 57, 58 by the man-machine interface 68 so that the The man-machine interface 68 can determine an identification symbol 44 for each satellite 18 observed and not recognized.
- the display device 72 can perform a graphic analysis of the display of the observed satellites 12, 14, 16 identified observed and of satellites 18, 20 observed not recognized so as to define neighboring areas immediate 57, 58 around satellites 18, 20 observed unrecognized.
- the display device 72 is configured to symbolically display the particular characteristic of the category of intrinsic identification parameters assigned to each satellite 18, 20 observed and not recognized displayed.
- the invention in addition to determining the orbital trajectory of the satellites observed from their orbital position and their speed determined during their passage through the listening field 27, 29 of the sensors 24, 26, 28 for spatial listening, the invention makes it possible to analyze the orbital similarity between two satellites, that is to say by pair of satellites, and also to analyze the orbital positions of the observed satellites not listed in order to determine the particular characteristics by category of their intrinsic identification parameter.
- the invention also makes it possible, by means of a display device 72, to access a schematic analytical display relating to the satellites 12, 14, 16, 18, 20 observed making it possible to intuitively display the information coming from the sensors 24, 26, 28 spatial listening.
- the determination of the orbital similarity coefficient by the calculation unit 60 can be carried out according to several variants.
- orbital similarity search algorithms The common point of the orbital similarity search algorithms is to be able, for each pair of satellites 12, 14 observed, to evaluate the resemblances in dynamic behavior between each pair of satellites 12, 14 observed and to attribute to this pair 12, 14 an orbital similarity coefficient or also called scalar or similarity gradient.
- the alternative algorithms are described using a standardized format of the orbital parameters called two-line orbital parameters, or more commonly in English, Two-Line Elements, very often designated by the acronym TLE.
- the orbital parameters make it possible to calculate the position of objects in orbit at any time according to the laws of Kepler and Newton. For this purpose, the following notations must be considered:
- TLE (i) be a list of orbital parameters estimated over time. Each TLE (i) has a reference time TLE_t (i). We can assume that the error of the estimate of the orbit TLE (i) is minimal at the reference time TLE_t (i).
- Param_Comb (TLE (i), t) be a combination of the orbital parameters at time t.
- Param_Comb (TLE k , t 1 -> t 2 ) be the temporal list of the combinations of the orbital parameters of the satellite k between t x and t 2 .
- Param_Comb i (TLE k , t 1 -> t 2 ) be the combination i of the ephemerides of the satellites k between the instants t x and t 2 .
- ParamjSombi can be the position or the speed according to x, y or z in inertial frame or in Earth frame, Keplerian parameters, longitude.
- Param_Comb i (TLE k , t 1 -> t 2 ) therefore represents a vector of dimension [number of combinations x; number of discrete moments].
- a first orbital similarity algorithm called the geographic similarity search algorithm
- the orbital similarity coefficient is determined according to a step of calculating the energy required for the change of orbit from a first satellite 12 to the orbit of a second satellite 14.
- a second orbital similarity algorithm called the temporal similarity search algorithm
- the orbital similarity coefficient is determined according to a step of comparative analysis of the temporal evolution between a first list and a second list of orbital parameters of a pair of satellites 12, 14 observed.
- this algorithm can be a correlation by pair of signals.
- Corr be a correlation function between 2 time signals.
- Corr Param_Comb (TLE k , tl- > t2)
- Param_Comb (TLE
- a third orbital similarity algorithm called the frequency similarity search algorithm
- the orbital similarity coefficient is determined according to a step of comparative analysis of the frequency spectra of the orbital parameters of a first and a second list of orbital parameters of a pair of satellites 12, 14 observed.
- a Fourier transform of the signal makes it possible to extract a vector of principal components of the decomposition.
- a frequency similarity index Ie is thus the norm of the difference of two decomposition vectors, one per satellite. This frequency similarity can be calculated both on the orbital parameters Param_Comb (TLE k , t 1 -> t 2 ) and on combinations of orbital parameters resulting from a preprocessing Param_Comb i (TLE k , t 1 -> t 2 ).
- the system 10 for analyzing the orbits of satellites 12, 14, 16, 18, 20 described in FIGS. 1, 2 and 3 allows the implementation of a method 100 for analyzing orbits of satellites 12, 14, 16, 18, 20 observed.
- the first step relating to the analysis method 100 comprises at least one observation step 110 of the satellites 12, 14, 16, 18, 20 in orbit during their passage through the listening field 27, 29 d 'at least one spatial listening sensor 24, 26, 28.
- the observation can be an observation relating only to the reception of signals originating from the satellites 12, 14, 16, 18, 20 in orbits such as radiofrequency signals transmitted by the satellites 12, 14, 16, 18, 20 and received by the spatial listening sensors 24, 26, 28 of the radiofrequency reception antenna type, or else by the reception of a plurality of satellite images 12, 14, 16, 18, 20 through optical receivers or of telescopes.
- the analysis method 100 comprises a step 130 of determining a coefficient of orbital similarity per pair of satellites 12, 14 observed, representative of the degree of resemblance of the dynamic behavior between two satellites 12, 14 observed.
- the degree of resemblance of the dynamic behavior between two satellites 12, 14 observed is evaluated by evaluating the degree of resemblance of the orbital parameters of each pair of satellites 12, 14 observed.
- the analysis method 100 allows space surveillance professionals, initially, to identify the satellites 12, 14, 16 observed already listed in a database 66 or catalog made available to them. provision, and therefore to identify the satellites 18, 20 observed not forming part of their database 66.
- the analysis method 100 comprises a dating step 140 of the orbital parameters determined according to their determination step 120 above, the dating of the orbital parameters being relative to the date of passage of the satellites 12, 14, 16, 18, 20 observed in the listening field 27, 29 of the sensors 24, 26, 28 of spatial listening.
- the next two steps consist in classifying the satellites 12, 14, 16, 18, 20 observed into observed satellites 12, 14, 16 identified and observed satellites 18, 20 not recognized.
- the analysis method 100 comprises an allocation step 150 to each observed satellite 12, 14, 16, the dated orbital parameters of which correspond by orbital analogy to the orbital parameters of the same date of a listed satellite. in the database 66, the identifier of said listed satellite and the intrinsic identification parameters associated with the identifier.
- the method 100 also includes an allocation step 160 to each satellite 18, 20 observed, whose dated orbital parameters do not correspond by orbital analogy to the orbital parameters of the same date of a satellite listed in the database data 66, an observed satellite status 18, 20 not recognized.
- the attribution of identifiers listed to a plurality of satellites 12, 14, 16 observed makes it possible to know their particular characteristics relating to their intrinsic identification parameters, namely by example, their mission, their operator or even their manufacturer. From the information relating to the intrinsic identification parameters of the observed satellites 12, 14, 16 identified, and from their orbital position at a given instant, the analysis method 100 makes it possible to attribute particular characteristics relating to parameters identification with satellites 18, 20 observed unrecognized.
- the analysis method 100 comprises a step of defining 180 an immediate neighborhood zone 57, 58 around each satellite 18, 20 observed and not recognized; said immediate neighborhood zone 57, 58 comprising a plurality of identified observed satellites 12, 14, 16.
- the immediate neighborhood area 57, 58 is defined as a limited space around an unrecognized observed satellite in which are located the identified observed satellites 12, 14, 16 whose orbital position is closest to the satellite 18 observed not recognized according to a direction and a particular angle of observation from the satellite 18 observed not recognized.
- the analysis method 100 comprises a step of determining 190, for each satellite 18, 20 observed and not recognized, of a particular characteristic of intrinsic identification parameters. mainly associated with the observed satellites 12, 14, 16 identified included in the immediate neighborhood area 57, 58.
- the analysis method 100 determines that the unrecognized satellite 18 around which the immediate neighborhood area 57 is defined is a telecommunications mission satellite.
- the display device 72 described in FIGS. 2 and 3 makes it possible to add to the method particular steps of defining the immediate neighborhood zones 57, 58.
- the definition step 180 of each immediate neighborhood zone 57, 58 around each observed unrecognized satellite 18, 20 comprises a display step 182 on the display device 72, symbolically, that is to say by displaying symbols, of at least a plurality of observed satellites 12, 14, 16 identified relative to their orbital position, and also of unrecognized observed satellites 18, 20.
- the display shown in Figures 2 and 3 only a portion of the star 22, that is to say the Earth, is shown. Consequently, only the satellites 12, 14, 16, 18, 20 observed, the orbital position of which is visible with regard to the portion of the star 22 shown, are displayed.
- the step of defining 180 of each immediate neighborhood zone 57, 58 around each satellite 18, 20 comprises a step of determining 184 , relative to the display, of each immediate neighborhood zone 57, 59 around each satellite 18, 20 observed and not recognized.
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Astronomy & Astrophysics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1914792A FR3105182B1 (fr) | 2019-12-18 | 2019-12-18 | Système et méthode d’analyse d’orbites de satellites |
| PCT/FR2020/052529 WO2021123661A1 (fr) | 2019-12-18 | 2020-12-18 | Système et méthode d'analyse d'orbites de satellites |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3941833A1 true EP3941833A1 (fr) | 2022-01-26 |
Family
ID=74125236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20848846.0A Ceased EP3941833A1 (fr) | 2019-12-18 | 2020-12-18 | Système et méthode d'analyse d'orbites de satellites |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3941833A1 (fr) |
| FR (1) | FR3105182B1 (fr) |
| WO (1) | WO2021123661A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140330544A1 (en) * | 2013-05-02 | 2014-11-06 | Lawrence Livermore National Security, Llc | Modeling the long-term evolution of space debris |
| US20160188176A1 (en) * | 2014-12-31 | 2016-06-30 | Valepro, LLC | Systems and Methods for Resident Space Object Visualization |
| US20170096242A1 (en) * | 2015-07-28 | 2017-04-06 | Analytical Graphics Inc. | Probability and frequency of orbital encounters |
-
2019
- 2019-12-18 FR FR1914792A patent/FR3105182B1/fr active Active
-
2020
- 2020-12-18 EP EP20848846.0A patent/EP3941833A1/fr not_active Ceased
- 2020-12-18 WO PCT/FR2020/052529 patent/WO2021123661A1/fr not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140330544A1 (en) * | 2013-05-02 | 2014-11-06 | Lawrence Livermore National Security, Llc | Modeling the long-term evolution of space debris |
| US20160188176A1 (en) * | 2014-12-31 | 2016-06-30 | Valepro, LLC | Systems and Methods for Resident Space Object Visualization |
| US20170096242A1 (en) * | 2015-07-28 | 2017-04-06 | Analytical Graphics Inc. | Probability and frequency of orbital encounters |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2021123661A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3105182B1 (fr) | 2022-01-14 |
| WO2021123661A1 (fr) | 2021-06-24 |
| FR3105182A1 (fr) | 2021-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3200153B1 (fr) | Procédé de détection de cibles au sol et en mouvement dans un flux vidéo acquis par une caméra aéroportée | |
| US20130050180A1 (en) | Graphical Rendition of Multi-Modal Data | |
| EP4526212B1 (fr) | Procédé et dispositif pour la détermination d'une loi de pointage d'un satellite par détermination d'une distribution spatio-temporelle | |
| FR2674339A1 (fr) | Procede et appareil pour detecter des cibles dans des images sonar. | |
| EP3326150B1 (fr) | Procédé de visualisation d'un spot laser | |
| EP1582888A1 (fr) | Procédé de localisation aveugle large bande d'un ou plusieurs émetteurs à partir d'un porteur défilant | |
| Ciurte et al. | Automatic detection of meo satellite streaks from single long exposure astronomic images | |
| EP0410826B1 (fr) | Procédé itératif d'estimation de mouvement, entre une image de référence et une image courante, et dispositif pour la mise en oeuvre de ce procédé | |
| EP3324361B1 (fr) | Procede de detection et de pistage de cibles | |
| EP0863488A1 (fr) | Procédé de détection de contours de relief dans une paire d'images stéréoscopiques | |
| EP3384462B1 (fr) | Procede de caracterisation d'une scene par calcul d'orientation 3d | |
| US12217502B2 (en) | Atmospheric chemical species detection using multispectral imaging | |
| EP3941833A1 (fr) | Système et méthode d'analyse d'orbites de satellites | |
| EP2174268B1 (fr) | Procede, dispositif et systeme pour la fusion d'informations provenant de plusieurs capteurs | |
| Wilson et al. | A contaminant-free catalogue of Gaia DR2–WISE Galactic plane matches: including the effects of crowding in the cross-matching of photometric catalogues | |
| Vernstrom et al. | Deep 3-GHz observations of the Lockman Hole North with the Very Large Array–I. Source extraction and uncertainty analysis | |
| EP4025503B1 (fr) | Système et méthode d'analyse d'orbites mono-satellite | |
| Tompkins et al. | Near earth space object detection using parallax as multi-hypothesis test criterion | |
| EP3757943B1 (fr) | Procédé et dispositif de télémétrie passive par traitement d'image et utilisation de modeles en trois dimensions | |
| Goudail et al. | Some practical issues in anomaly detection and exploitation of regions of interest in hyperspectral images | |
| WO2022106556A1 (fr) | Procédé de détermination d'une densité d'éléments dans des zones d'un environnement, produit programme d'ordinateur associé | |
| EP3427225B1 (fr) | Procédé de traitement d'images | |
| FR3034229A1 (fr) | Procede de denombrement d'objets dans une zone spatiale predeterminee | |
| Short | Automated image-based range performance measurement using TOD | |
| WO2024234079A1 (fr) | Système informatique et procédé de surveillance maritime et d'observation terrestre par satellite d'objets à l'aide d'une mise en correspondance d'images oblique nadir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20211020 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20230105 |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 20250207 |