WO2022254327A1 - Système d'acquisition de données par satellite - Google Patents

Système d'acquisition de données par satellite Download PDF

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Publication number
WO2022254327A1
WO2022254327A1 PCT/IB2022/055076 IB2022055076W WO2022254327A1 WO 2022254327 A1 WO2022254327 A1 WO 2022254327A1 IB 2022055076 W IB2022055076 W IB 2022055076W WO 2022254327 A1 WO2022254327 A1 WO 2022254327A1
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WO
WIPO (PCT)
Prior art keywords
satellite
antenna
signal
signals
radiofrequency
Prior art date
Application number
PCT/IB2022/055076
Other languages
English (en)
Inventor
Alessandro FANNI
Original Assignee
Cshark S.R.L.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cshark S.R.L. filed Critical Cshark S.R.L.
Priority to EP22731323.6A priority Critical patent/EP4347404A1/fr
Publication of WO2022254327A1 publication Critical patent/WO2022254327A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G1/00—Cosmonautic vehicles
    • B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
    • B64G1/1021—Earth observation satellites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G1/00—Cosmonautic vehicles
    • B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
    • B64G1/1021—Earth observation satellites
    • B64G1/1028—Earth observation satellites using optical means for mapping, surveying or detection, e.g. of intelligence
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G3/00—Observing or tracking cosmonautic vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance

Definitions

  • the present invention relates to the technical field of satellites and the communication methods implemented by them.
  • the present invention relates to a data acquisition system that can be installed on a satellite in order to configure it for the acquisition of information, such as, for example, photographs, videos and LoRaWAN packets, from the Earth’s surface.
  • the present invention also relates to the entire satellite communication network, including the satellite on which the device is installed, a ground station with which the latter communicates and loT sensors / actuators that transmit and/or receive LoRaWAN packets.
  • Satellite imaging that is, the acquisition of images from the Earth’s surface by means of one or more satellites, is a highly important tool that is used both by governments and by business entities for the purpose of gathering useful information about the activities underway on the ground.
  • the information acquired can be used for the purpose of land mapping, weather forecasting, assisting scientific research, navigation, pollution monitoring, town planning and the like.
  • the satellite acquires real-time information about the Earth’s surface, and the objects situated on it, and can thus represent the condition of the land, as well as identifying any changes (for example, new structures and geological formations). It is thus evident how important the role played by satellites is for information gathering and monitoring certain areas, in particular thanks to the possibility of obtaining data substantially in real time.
  • the prior art systems have architectures and operating methods that greatly limit the reception and transmission of information from and to the satellite, as they are structurally rigid and allow an exchange of information only when the satellite is in a precise, very limited transmission window, which is often for the most part exploited solely to establish the connection channel, leaving very limited time for the exchange of information that is actually of interest.
  • the technical task at the basis of the present invention is to propose a data acquisition system usable in the satellite industry which overcomes at least some of the aforementioned drawbacks of the prior art.
  • a data acquisition system for a satellite comprises a camera, a device for controlling ambient parameters and processing radiofrequency signals and a microprocessor.
  • the camera can be activated so as to acquire images of the Earth’s surface, generating optical signals representative of those images.
  • the device for controlling ambient parameters and processing radiofrequency signals is interfaceable with a first antenna in order to receive a radiofrequency signal for the activities of controlling the balance and the ambient parameters.
  • the device for controlling ambient parameters and processing radiofrequency signals is interfaceable with a second antenna in order to receive the signals interpreted by the microprocessor, perform LoRaWAN uplink/downlink operations and carry out the transmission of images/video towards the ground.
  • the microprocessor is configured to control the activation of the camera on the basis of information content of the activation signal.
  • the microprocessor is further configured to store the optical signals.
  • the microprocessor is further configured to process the optical signals, in particular to compress the optical signals.
  • the microprocessor is further configured to process the LoRaWAN uplink/downlink signals.
  • the present invention also relates to an Earth observation satellite.
  • the satellite comprises a data acquisition system, a first antenna, a second antenna and a computer.
  • the data acquisition system is or comprises a data acquisition system according to the present invention.
  • the first and second antennas are connected to the data acquisition system.
  • the first antenna is also configured to transmit and receive radiofrequency signals in accordance with a first transceiving protocol.
  • the second antenna is configured to transmit and receive radiofrequency signals in accordance with a second transceiving protocol.
  • the second transceiving protocol is different from the first transceiving protocol.
  • the computer is configured to interface the microprocessor with the second antenna.
  • connection existing between the first antenna and the microprocessor is managed/controlled by means of the computer.
  • the present invention also relates to a ground station for satellite communication and a set of loT sensors/actuators that transmit/receive data using the LoRaWAN protocol.
  • the ground station comprises an orientable antenna, a plurality of sensors and a control unit.
  • the orientable antenna is interfaceable with a satellite in order to communicate with the satellite according to at least one communication parameter.
  • the orientable antenna is interfaceable with a satellite in order to receive optical signals.
  • the sensors are configured to acquire one or more operating parameters of the orientable antenna.
  • the station can also comprise or be connected to sensors and/or actuators configured to transmit/receive operating parameters using the LoRaWAN protocol.
  • the control unit is configured to modify at least one communication parameter of the orientable antenna on the basis of the operating parameters.
  • the present invention also relates to a satellite communication network.
  • the network comprises at least one satellite and at least one ground station.
  • the satellite is or comprises a satellite according to the present invention.
  • the ground station is or comprises a ground station according to the present invention.
  • the present invention also relates to a method of satellite communication.
  • the method can advantageously be implemented by a satellite communication network in accordance with the present invention.
  • the method is implemented through the following steps:
  • FIG. 1 schematically shows a satellite on which a data acquisition device is installed.
  • the reference number 1 generically denotes a data acquisition system, which will be referred to simply as the system 1 hereinafter in the present description.
  • system of the present invention is specifically designed and configured to be installed in a satellite 10.
  • the system 1 comprises at least one camera 2, a device for controlling ambient parameters and processing radiofrequency signals 3 and a microprocessor 4.
  • the camera 2 can be activated so as to acquire images such as photographs and/or videos (obtainable by rapid acquisition of a plurality of photographs spaced closely in time) of the Earth’s surface.
  • the camera 2 is capable of operating during the satellite’s normal orbit in order to acquire information by taking one or more photographs of the Earth’s surface over which the satellite 10 is passing.
  • the term camera 2 is understood to include, in general terms, any sensor/device capable of acquiring images.
  • the camera 2 then generates digital signals, identified in the present description as “optical signals”, representative of the acquired information, i.e. of the images obtained.
  • the activation and more in general the operation of the camera 2 can be controlled and managed from the ground by sending suitable instructions.
  • the correct acquisition of the information necessary for managing the operation of the camera 2, and of the system 1 in general, is mediated by the device for controlling ambient parameters and processing radiofrequency signals 3, which is interfaceable with a first antenna 11 in order to receive a radiofrequency signal that is then converted into an activation signal and/or into a LoRaWAN uplink/downlink signal.
  • the device for controlling ambient parameters and processing radiofrequency signals performs the function of a gateway coupled to the first antenna 1 in order to receive therefrom the radiofrequency signals that are picked up and translate them into a machine language, i.e. the activation signal, which can be used to control the operation of the camera 2.
  • a gateway coupled to the first antenna 1 in order to receive therefrom the radiofrequency signals that are picked up and translate them into a machine language, i.e. the activation signal, which can be used to control the operation of the camera 2.
  • control signal is acquired and processed by the microprocessor 4, which is configured to exploit the information content present within the activation signal (and/or the LoRaWAN uplink/downlink signal) to control the operation of the camera 2.
  • the operation of the system 1 provides for the acquisition of commands from the ground in the form of radiofrequency signals that are converted/translated by the device for controlling ambient parameters and processing radiofrequency signals 3 into an activation signal that can be used by the microprocessor 4 to control the operation, in particular the activation, of the camera 2 in order to acquire photographs and/or videos which are then converted into one or more optical signals.
  • the microprocessor 4 is configured to select one or more photograph and/or video acquisition parameters also on the basis of the information content of the activation signal.
  • the information content of the activation signal can instruct the microprocessor 4 to control the operation of the camera 2 so as to modify at least one of: number of photographs to be acquired, time of acquisition of one or more photographs, resolution, enlargement, focusing, and brightness of one or more photographs.
  • the microprocessor 4 is likewise configured to process the optical signals acquired by the camera 2 so as to modify at least one representative parameter thereof.
  • the microprocessor 4 is capable of acquiring and modifying the optical signals in particular, as will become clearer further below in the present description, in order to favour and facilitate their subsequent storage and transmission to the ground.
  • the microprocessor 4 is configured to compress the optical signals, according to algorithms and procedures of a known type, in order to reduce their overall size, i.e. in order to reduce the amount of memory necessary for storing them (and thus the total amount of data it is necessary to transmit in order to send the information acquired to the ground).
  • microprocessor 4 is also advantageously configured to encrypt the optical signals, so that they can be acquired and interpreted solely by individuals actually authorised to do so.
  • the microprocessor 4 is also connectable to a readable storage medium so as to enable the optical signals to be stored.
  • the microprocessor can both store the optical signals internally and transmit them for storage to the readable storage medium.
  • the readable storage medium is a local medium installed on the same satellite 10 on which the system 1 is also installed, so as to permit an efficient storage of the information acquired and ensure that the latter can be correctly transferred to the ground also at times after the acquisition thereof.
  • the system 1 described thus far or in general a data acquisition system having at least some of the technical features defined thus far, is installed inside a satellite 10.
  • the satellite 10 is an Earth observation satellite 10, that is to say, a satellite 10 intended to monitor the Earth’s surface and acquire data and information representative of the latter.
  • the satellite 10 is preferably of the CubeSat type, i.e. it is a miniaturised satellite 10 having a cubic shape, a volume of 1 dm 3 and a mass no greater than 1.33 kg, thus proving particularly compact and lightweight.
  • the satellite also comprises the first antenna 11 , a second antenna 12 and a computer 13.
  • the first antenna 1 is connected to the data acquisition system 1 and is configured to transmit and receive radiofrequency signals in accordance with a first transmission protocol.
  • the first antenna 11 is configured to interface with a ground system so as to receive therefrom radiofrequency signals via a first transmission protocol that defines and determines the ways in which information will be exchanged between the two.
  • the second antenna 12 is configured to receive and transmit radiofrequency signals via a second transmission protocol, preferably different from the first transmission protocol.
  • the satellite 10 comprises a pair of antennas, each configured to operate autonomously and independently in order to transmit and receive respective radiofrequency signals by exploiting different transmission protocols.
  • the satellite 10 is capable of communicating with the ground, selecting on each occasion the antenna that is more suitable for every specific communication and optimising the process of transmitting the information acquired by the camera 2 and contained in the optical signals processed by the microprocessor 4.
  • the first antenna 11 is configured to transmit the optical signals using the first protocol.
  • the first antenna 11 By means of the first antenna 11 , it is thus possible to send to the ground the images identified by the optical signals generated by the camera 2 and subsequently compressed by the microprocessor 4.
  • the first transmission protocol is based on a first type of modulation, in particular a modulation of the Gaussian frequency-shift keying (GFSK) type can be used.
  • GFSK Gaussian frequency-shift keying
  • This protocol defines a radiofrequency signal modulation technique of a numerical type, wherein the modulating signal containing the information shifts the output frequency of the carrier from one of two predetermined values to the other.
  • the frequency is not directly modulated with the digital data symbols, but is first filtered with a Gaussian filter to make the transitions smoother.
  • This filtering process has the advantage of reducing the power of the sideband, thereby reducing interferences with adjacent channels and improving the quality of the data transmission process.
  • the GFSK protocol is preferably implemented in such a way as to obtain a transmission speed of at least a 200 Kbit/s.
  • the second transmission protocol is based on a second type of modulation (different from the first type of modulation), in particular a radiofrequency signal modulation of the LoRa® type.
  • This protocol defines a spread spectrum radiofrequency signal modulation technique derived from chirp spread spectrum (CSS) technology.
  • the LoRa® protocol is preferably implemented with a spread factor of SF10 to SF12 and enables an uplink speed, i.e. a speed of sending data from the ground to the satellite 10, comprised in the range of 400 - 500bit/s.
  • the maximum size of the individual packets sent is comprised between 35 and 45 bytes, preferably equal to 40 bytes.
  • the interfacing between the first antenna 11 and the system 1 is realised by means of the computer 13.
  • the computer 13 can also realise or contribute to realising the interfacing between the system 1 and the second antenna 12.
  • the computer 13 is, comprises or defines a computer on board the satellite 10 and is intended to manage the operation thereof, while also controlling the management of contacts with the ground by activating the antennas 11 and 12 and controlling their operation for the purpose of receiving and sending radiofrequency signals.
  • the computer 13 preferably comprises the readable storage medium, and is thus operatively configured to store at least the optical signals generated by the camera 2 and processed by the microprocessor 4 and configured to store signals transmitted/received via the second protocol.
  • This readable storage medium can be advantageously used also to store any data, information, algorithm and software necessary for the correct functioning and operation of the satellite 10.
  • the satellite 10 further comprises a box-like body 14 inside which at least some of the essential components of the satellite itself 10 are positioned.
  • the data acquisition system 1 and the computer 13 are housed inside the box-like body 14, whereas the first and second antennas 11 , 12 are coupled to an outer surface of the box-like body 14. Therefore, the antennas 11 , 12 are arranged outside the box-like body 14 so that the latter cannot interfere with the correct transmission and reception of radiofrequency signals.
  • the box-like body 14 has pass-through seats adapted to allow a wired connection between the first and second antennas 11 , 12 and respectively the system 1 and the computer 13.
  • the satellite can further comprise one or more thrusters, preferably one or more orientable thrusters whereby it is possible to control the trajectory (in particular the altitude) of the satellite itself.
  • the thrusters can be connected to the control unit, to the microprocessor 4 and/or in general to the data acquisition system 1 in order to receive commands and information that control the activation thereof in terms of duration, power and direction of the thrust exerted, so as to enable the trajectory of the satellite to be modified.
  • the thrusters can be advantageously used to ensure that a predetermined altitude is maintained and/or reached.
  • the present invention further relates to a ground station for satellite communication with which the satellite 10 interfaces in order to receive radiofrequency signals by means of the first antenna 1 which can be converted into activation signals by the device for controlling ambient parameters and processing radiofrequency signals 3 and to send the optical signals by means of the first antenna 11 so as to transfer the images acquired by the camera 2 to the ground.
  • the ground station comprises an orientable antenna, a plurality of sensors and a control unit.
  • the orientable antenna is configured to interface with the satellite 10 so as to establish a communication channel, in particular a communication channel encrypted with an AES-128 algorithm, defined according to at least one communication parameter.
  • the communication channel is used for a communication exploiting radiofrequency signals with the aim of sending instructions and commands to the satellite 10 in order to control the operation thereof and receiving from the satellite 10 optical signals by means of which the images collected by the satellite 10 itself are acquired.
  • the sensors are configured to acquire one or more operating parameters of the orientable antenna, i.e. to measure and determine the operating conditions thereof, with particular attention to the characteristics of the communication channel (i.e. the quality of the radiofrequency signals transmitted and received by the orientable antenna).
  • the information acquired by means of the sensors is then used by the control unit to set and modify, if necessary, at least one of the communication parameters of the orientable antenna.
  • the control unit controls the operation of the orientable antenna on the basis of the data acquired by means of the sensors so as to optimise the process of radiofrequency signal exchange between the station and the satellite 10.
  • the ground station comprises a movement device configured to move the orientable antenna, in particular to orient it relative to an orbit followed by the satellites 10 with which it interfaces.
  • control unit is further configured to control and guide the operation of the movement device so as to modify the orientation of the orientable antenna also on the basis of the operating parameters.
  • control unit is configured to control the movement device so as to modify the orientation of the orientable antenna until the communication channel established between the orientable antenna and a specific satellite 10 is optimised.
  • the orientable antenna can be moved so as to maintain the exchange of information with the satellites 10 always optimal.
  • the control unit is further configured to execute a predictive algorithm whereby it is possible to determine the trajectory of at least one satellite 10 and the operating parameters on the basis of which the communication parameters of the orientable antenna are determined also comprise that trajectory.
  • the estimated trajectory of the satellites 10 is an input that is used by the control unit to determine the operating regime of the orientable antenna.
  • the time window within which it is possible for the ground station to communicate with the satellites 10 is extended, since the former follows the movement of the latter, thus proving to be optimally aligned for longer periods of time.
  • At least one ground station and at least one satellite 10 comprising at least some of the technical features outlined above contribute to define a satellite communication network.
  • the network further comprises at least one loT sensor and/or actuator, said sensor and/or actuator preferably being compatible in particular with the first transceiving protocol.
  • the satellite 10 is configured to communicate (specifically by means of the radiofrequency signals) with the other components in the network, in particular with the ground station and with the loT sensors/actuators.
  • the communication between the satellite 10 and the ground station takes place by means of the first antenna 11
  • the communication between the satellite 10 and the sensors/actuators takes place by means of the second antenna 12.
  • the satellite 10 besides communicating with the ground station, can thus receive uplink signals from loT terminals located on the ground (i.e. the sensors/actuators) and send downlink signals towards those terminals.
  • the network defines a group of interconnected elements by means of which it is possible to acquire, in a particularly efficient manner, images of the Earth’s surface and uplink/downlink signals according to the standard defined by the LoRaWAN protocol, in particular according to parameters for the acquisition thereof defined by the activation signal contained in the radiofrequency signal sent by the ground station/stations to the satellite/satellites 10.
  • the network can also comprise a server configured to acquire and/or store and/or distribute the optical signals and LoRaWAN uplink/downlink signals transmitted by the satellite 10 to the ground station.
  • the server represents the central node of the network, by means of which it is possible to gather all of the information acquired by the various satellites 10 in order then to process them, store and/or distribute them to additional terminals (computers, smartphones, tablets...) connected or connectible to the server.
  • the server can be a scalar processor (cloud computing) based on structured and unstructured data (Sql / MongoDB) easily accessible remotely so as to make the acquisition and dissemination of optical signals, the display of the LoRa signals acquired by the loT sensors / actuators and the sending of commands to the actuators particularly simple.
  • the radiofrequency signals are preferably encrypted radiofrequency signals, i.e. all of the information and data managed by the network, in particular the optical signals, are encrypted so as to enable their acquisition and comprehension solely by users who are actually authorised and enabled to access the data contained within them.
  • LoRaWAN signals are likewise encrypted at the level of the physical layer.
  • the server or another network component is configured to encrypt the optical signals.
  • the functioning of the network described herein defines a method of satellite communication wherein one or more satellites 10 acquire images of the Earth’s surface and LoRaWAN signals from loT sensors/actuators, in accordance with specific parameters dictated by the activation signals, and transmit them to the ground (specifically to the ground stations) in the form of optical signals.
  • the method is implemented by sending, by means of the orientable antenna, a radiofrequency signal using the first transmission protocol.
  • This step can be preceded by a set-up process in which the orientable antenna is activated and the control unit connected to it acquires, or calculates, the position and trajectories of the satellites 10 with which it has to interface.
  • the set-up phase it is also possible to pre-set one or more communication parameters of the orientable antenna either automatically by means of the control unit or manually through inputs entered by a user.
  • the radiofrequency signal transmitted by the orientable antenna is then picked up by the first antenna 11 , which relays it to the device for controlling ambient parameters and processing radiofrequency signals 3, which proceeds to convert it, transforming it into the activation signal.
  • the activation signal is then processed by the microprocessor, which interprets the information content thereof and controls the operation of the camera 2 accordingly for the acquisition of images from the Earth’s surface.
  • the camera 2 is controlled according to the information content of the activation signal so as to acquire images and generate corresponding optical signals accordingly.
  • optical signals can then be processed, in particular by the microprocessor, in order to compress them to reduce the amount of memory necessary for storing them.
  • optical signals preferably in the readable storage medium, which can be included in the computer 13 of the satellite 10.
  • the satellite 10 is advantageously capable of storing the information acquired according to the instructions determined by the activation signal so that it will also be able to send the corresponding optical signals to the ground at a later time.
  • This aspect is particularly useful in the event of a request (by means of the activation signal) for the acquisition of images of a portion of the Earth’s surface that is outside the possible range of communication of the ground station to which that information must then be transmitted.
  • the acquisition of the images and the transmission thereof to the ground can thus be carried out at two distinct and separate moments in time, making the process of communication between satellites 10 and ground stations more versatile.
  • the optical signals are transmitted, specifically by means of the first antenna 11 of the satellite 10, using the first communication protocol.
  • the first transceiving protocol and the first antenna are used to:
  • the second transceiving protocol and the second antenna 12 can be used to receive the signals transmitted from one or more terminals present on the ground towards the satellite 10, in particular to communicate with the loT sensors/actuators.
  • optical signals transmitted by means of the radiofrequency signals sent by the satellites 10 are picked up by the orientable antennas of the ground stations and from there can be shared within the network, for example by sending them to a central server where they can be stored/processed/sorted and/or transmitted to additional terminals that are or can be connected to the network.
  • the procedure for transmitting the optical signals by means of the satellites 10 via the suitable communication protocol can be carried out in response to a step of pre-authorising the transmission of the optical signal.
  • the sending of the optical signals by the satellites 10 is in this context conditional upon the completion of an authorisation procedure started from the ground stations.
  • the pre-authorisation step is carried out by sending, by means of the orientable antenna of a ground station, a transmission authorisation signal via the first transmission protocol.
  • the present invention achieves the proposed objects, overcoming the aforementioned drawbacks of the prior art, by providing the user with a data acquisition system 1, a satellite 10, a ground station, a network and a method of satellite communication that enable the process of monitoring the Earth’s surface to be optimised, with particular attention to the procedures for acquiring images (photographs and/or videos) and transmitting the latter to the ground.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Evolutionary Computation (AREA)
  • Radio Relay Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

Un système d'acquisition de données pour un satellite (10) comprend au moins une caméra (2), un dispositif de commande de paramètres ambiants et de traitement de signaux radiofréquence (3) et un microprocesseur (4). La caméra (2) peut être activée de manière à acquérir des images de la surface de la Terre, générant des signaux optiques représentatifs de ces images. Le dispositif de commande de paramètres ambiants et de traitement de signaux radiofréquence (3) est interfaçable avec une première antenne (11) afin de recevoir des signaux radiofréquence et de gérer les paramètres ambiants/l'attitude du satellite (10), et une seconde antenne (12) afin de recevoir des signaux radiofréquence interprétés par le microprocesseur (4) de façon à effectuer des opérations sur la caméra (2) ou des opérations de liaison montante/liaison descendante de paquets.
PCT/IB2022/055076 2021-05-31 2022-05-31 Système d'acquisition de données par satellite WO2022254327A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22731323.6A EP4347404A1 (fr) 2021-05-31 2022-05-31 Système d'acquisition de données par satellite

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IT102021000014213 2021-05-31
IT102021000014213A IT202100014213A1 (it) 2021-05-31 2021-05-31 Sistema satellitare di acquisizione dati”

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014121197A2 (fr) * 2013-02-01 2014-08-07 NanoSatisfi Inc. Système et procédé pour un accès par satellite orbital généralisé à bas coût
US20170272150A1 (en) * 2014-10-15 2017-09-21 Spire Global, Inc. Satellite operating system, architecture, testing and radio communication system
WO2019075305A1 (fr) * 2017-10-13 2019-04-18 Elwha Llc Constellation de satellites comprenant un traitement de bord d'image
WO2019140159A1 (fr) * 2018-01-11 2019-07-18 Skeyeon, Inc. Liaison descendante de données de radiofréquence pour un système de satellite en orbite proche de la terre à taux de revisite élevé
US20210036772A1 (en) * 2019-08-01 2021-02-04 Planet Labs, Inc. Multi-Pathway Satellite Communication Systems and Methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014121197A2 (fr) * 2013-02-01 2014-08-07 NanoSatisfi Inc. Système et procédé pour un accès par satellite orbital généralisé à bas coût
US20170272150A1 (en) * 2014-10-15 2017-09-21 Spire Global, Inc. Satellite operating system, architecture, testing and radio communication system
WO2019075305A1 (fr) * 2017-10-13 2019-04-18 Elwha Llc Constellation de satellites comprenant un traitement de bord d'image
WO2019140159A1 (fr) * 2018-01-11 2019-07-18 Skeyeon, Inc. Liaison descendante de données de radiofréquence pour un système de satellite en orbite proche de la terre à taux de revisite élevé
US20210036772A1 (en) * 2019-08-01 2021-02-04 Planet Labs, Inc. Multi-Pathway Satellite Communication Systems and Methods

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IT202100014213A1 (it) 2022-12-01

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