KR102130366B1 - Apparatus and method for distance measurement to satellites using multiple ground stations - Google Patents

Abstract

Disclosed is an apparatus and method for measuring a distance to a satellite using a plurality of ground stations. A method of measuring a distance to a satellite performed by a primary ground station includes generating schedule data for measuring a distance to the satellite for each of the primary ground station and a plurality of secondary ground stations; Transmitting the generated schedule data to each of the plurality of secondary ground stations; Performing distance measurement to the satellite using scenario data for controlling distance measuring equipment included in the main ground station according to the generated schedule data; Receiving a result of measuring a distance to the satellite performed by each of the plurality of sub-ground stations according to the generated schedule data; Generating result data for the satellite by merging the distance measurement result performed by the primary ground station and the distance measurement result received from each of the plurality of secondary ground stations; And predicting the position of the satellite using the generated result data.

Description

Apparatus and method for measuring distance to satellite using multiple ground stations{APPARATUS AND METHOD FOR DISTANCE MEASUREMENT TO SATELLITES USING MULTIPLE GROUND STATIONS}

The present invention relates to an apparatus and method for measuring a distance to a satellite using a plurality of ground stations, and more specifically, when performing using a plurality of ground stations in a satellite control system, measuring a distance between a ground station and a satellite required to determine a satellite orbit It's about how to automate tasks.

All satellites need a satellite control system to control and perform their missions. The satellite control system includes a TTC (Tracking, Telemetry, and Command) subsystem that includes an antenna for communication with satellites such as distance measurement and remote command, and a real-time operating subsystem for monitoring the status of satellites and generating commands in real time. It consists of a flight dynamics subsystem to determine the satellite's orbit and maintain its position, and a satellite simulator subsystem to simulate the satellite from the ground.

Geostationary satellites are located about 36000 km above the ground and move along satellite orbit over time. At this time, if the satellite moves along the normal satellite orbit, it is possible to perform the mission through the satellite. If the satellite deviates from the normal satellite orbit, it must be re-entered into the original normal satellite orbit to perform the mission through the satellite. Therefore, it is necessary to predict the exact position of the satellite in the ground station in order to perform the normal mission of the satellite.

In order to predict the position of the satellite, in Korea, the distance from the satellite is periodically measured in the ground station, and the measured distance information and the angle information (azimuth angle, elevation angle) of the antenna are used together. In the case of using a single ground station, the distance measurement data of about 1 hour unit requires more than 24 hours in order to predict the exact position of the satellite, so the measurement time is long and the prediction result is also inaccurate.

Accordingly, the present invention provides a method for automating the distance measurement mission to a satellite using a plurality of ground stations to enable precise orbit prediction in a short time.

The present invention relates to an apparatus and method for measuring a distance to a satellite using a plurality of ground stations, and more specifically, an automated method for measuring a distance between a ground station and a satellite required to determine a satellite orbit in a satellite control system using a plurality of ground stations Provides an apparatus and method for accurately predicting a satellite's orbit in a short time by providing a.

A method of measuring a distance to a satellite performed by a primary ground station according to an embodiment of the present invention includes generating schedule data for measuring a distance to the satellite for each of the primary ground station and a plurality of secondary ground stations; Transmitting the generated schedule data to each of the plurality of secondary ground stations; Performing distance measurement to the satellite using scenario data for controlling distance measuring equipment included in the main ground station according to the generated schedule data; Receiving a result of measuring a distance to the satellite performed by each of the plurality of sub-ground stations according to the generated schedule data; Generating result data for the satellite by merging the distance measurement result performed by the primary ground station and the distance measurement result received from each of the plurality of secondary ground stations; And predicting the position of the satellite using the generated result data.

The generating of the schedule data may be adjusted so that the mission time for distance measurement performed by each of the primary ground station and the plurality of secondary ground stations does not overlap with each other.

The schedule data may include an ID assigned to each of the main ground station and a plurality of sub-ground stations, a start point of a task for distance measurement, a repetition number of tasks for distance measurement, and a task execution cycle for distance measurement. .

A method of measuring a distance to a satellite performed by an auxiliary ground station according to an embodiment of the present invention includes receiving schedule data for measuring a distance from the main ground station to the satellite; Performing distance measurement to the satellite using scenario data for controlling the distance measuring equipment included in the secondary ground station according to the received schedule data; And transmitting a measurement result of the distance to the satellite to the main ground station.

The schedule data may include an ID assigned to each of the main ground station and a plurality of sub-ground stations, a start point of a task for distance measurement, a repetition number of tasks for distance measurement, and a task execution cycle for distance measurement. .

The apparatus for measuring a distance to a satellite performed by a main ground station according to an embodiment of the present invention includes an antenna for measuring a distance to a satellite and a processor for processing data transmitted and received through the antenna, wherein the processor is the main For each of the ground stations and a plurality of sub-ground stations, schedule data for measuring the distance to the satellite is generated, the generated schedule data is transmitted to each of the plurality of sub-ground stations, and the main is determined according to the generated schedule data. The distance measurement to the satellite is performed using scenario data for controlling the antenna included in the ground station, and the distance measurement result to the satellite performed by each of the plurality of sub-ground stations is received according to the generated schedule data. The distance measurement result performed by the main ground station and the distance measurement result received from each of the plurality of sub-ground stations are merged to generate result data for the satellite, and the generated position data can be used to predict the position of the satellite. have.

According to an embodiment of the present invention, by providing an automated method of a distance measurement task between a ground station and a satellite required to determine a satellite orbit in a satellite control system using a plurality of ground stations, it is possible to accurately predict a satellite's orbit in a short time. .

1 is a diagram illustrating a conceptual diagram for measuring a distance to a satellite using a plurality of ground stations according to an embodiment of the present invention.
2 is a diagram illustrating a method of measuring a distance to a satellite performed by a main ground station according to an embodiment of the present invention.
3 is a diagram illustrating a conceptual diagram of generation of schedule data according to an embodiment of the present invention.
4 is a diagram illustrating a method of measuring a distance to a satellite performed by an auxiliary ground station according to an embodiment of the present invention.
5 is a diagram illustrating a schedule data registration procedure of a ground station according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an example of performing a task for distance measurement according to schedule data registered by a ground station according to an embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are exemplified only for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention These can be implemented in various forms and are not limited to the embodiments described herein.

Embodiments according to the concept of the present invention can be applied to various changes and can have various forms, so the embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosure forms, and includes changes, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various components, but the components should not be limited by the terms. The above terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be referred to as the second component, Similarly, the second component may also be referred to as the first component.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle. Expressions describing the relationship between the components, for example, "between" and "immediately between" or "directly adjacent to" should be interpreted similarly.

The terminology used herein is only used to describe specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "include" or "have" are intended to designate the presence of a feature, number, step, action, component, part, or combination thereof as described, one or more other features or numbers, It should be understood that the presence or addition possibilities of steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined herein. Does not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. The same reference numerals in each drawing denote the same members.

1 is a diagram illustrating a conceptual diagram for measuring a distance to a satellite using a plurality of ground stations according to an embodiment of the present invention.

The satellite 100 moving along the geostationary orbit in the sky far away from the ground has a phenomenon of moving out of the normal geostationary orbit over time. The ground station performs satellite control through communication with the satellite 100 and periodically measures the distance to the satellite 100 to predict the location of the satellite 100. At this time, if the predicted position of the satellite 100 is outside the normal geostationary orbit, the ground station may enter the satellite 100 into the normal geostationary orbit through a remote command.

In general, when the distance measurement from the main ground station 110 to the satellite 100 is performed, the distance from the plurality of sub-ground stations 120 to 122 is not performed. That is, since only a single ground station is used to measure the distance to the satellite, it takes a lot of time to accurately predict the position of the satellite, and the result also has a problem that is not precise.

However, in the present invention, the schedule data for the distance measurement mission from the main ground station 110 to the plurality of sub-ground stations 120 to 122 is transmitted through the Internet network 130, and the plurality of sub-ground stations 102 to 122 Each provides a method of predicting the position of the satellite 100 faster and more accurately by automatically measuring the distance to the satellite 100 based on the received schedule data.

At this time, the schedule data generated by the primary ground station 110 and transmitted to the plurality of secondary ground stations 120 to 122 is the mission time for distance measurement performed by the primary ground station 110 and the plurality of secondary ground stations 120 to 122, respectively. It can be created by adjusting not to overlap each other.

As described above, according to the present invention, the distance to the satellite 100 is measured by using the main ground station 110 and the plurality of sub-ground stations 120 to 122 to predict the position of the corresponding satellite 100 to obtain faster and more accurate results. have.

2 is a diagram illustrating a method of measuring a distance to a satellite performed by a main ground station according to an embodiment of the present invention.

The main ground station 110 may include an antenna for measuring the distance to the satellite 100 and a processor for processing data transmitted and received through the antenna.

In step 210, the main ground station 110 may generate schedule data for measuring the distance to the satellite 100 for each of the main ground station 110 itself and the plurality of sub-ground stations 120-122. At this time, since the distance measurement from the two ground stations to the satellite 100 cannot be performed at the same time, the main ground station 110 distributes the timing of starting the distance measurement between the ground stations so as not to overlap with each other so that the schedule data can be measured. Can be created.

The schedule data generated by the main ground station 110 includes IDs assigned to each ground station, the starting point of the task for distance measurement (Ts), the number of repetitions of the task for distance measurement (N), and the execution cycle of the task for distance measurement ( Tp).

In step 220, the main ground station 110 may transmit the schedule data to each of the plurality of sub-ground stations 120 to 122 through wireless or wired using the Internet network 130.

In step 230, the main ground station 110 may automatically measure the distance to the satellite 100 using scenario data for controlling the distance measuring equipment according to the generated schedule data. In this case, the scenario data includes data for checking and controlling the state of the corresponding distance measuring device at the time when the main ground station 110 starts the mission for distance measurement according to the schedule data.

The main ground station 110 may obtain distance information to the satellite 100 by performing distance measurement to the satellite 100 using scenario data according to the generated schedule data. In addition, the main ground station 110 may obtain information on azimuth and elevation angles, which are satellite tracking information collected from the antenna, which is controlled by using the scenario data. The main ground station 110 may generate result data for the satellite 100 of the main ground station 110 by using the distance information to the satellite 100 thus obtained and the azimuth and elevation angle of the antenna.

In step 240, the main ground station 110 may receive a distance measurement result to the satellite 100 performed by each of the plurality of sub-ground stations 120 to 122 according to the generated schedule data. At this time, the received distance measurement result may include information on azimuth and elevation angles, which are satellite tracking information collected from an antenna and distance information to the satellite 100 acquired by each of the sub-ground stations 120 to 122. have.

In step 250, the main ground station 110 is a distance measurement result from the main ground station 110 to the satellite 100 generated in step 230 and the distance received from each of the plurality of sub-ground stations 120-122. The measurement result may be merged to generate the final result data for the satellite 100.

In step 260, the main ground station 110 may predict the position of the satellite 100 using the final result data generated in step 250. Thereafter, when the predicted position of the satellite 100 is out of the normal satellite orbit, the main ground station 110 may return to the original satellite orbit through a remote command.

As described above, the present invention acquires distance measurement result data required for orbit prediction of the satellite 100 by using a plurality of ground stations instead of a single ground station, and automates the task for distance measurement, thereby accurately correcting the satellite 100 in a short time. You can predict the trajectory.

3 is a diagram illustrating a conceptual diagram of generation of schedule data according to an embodiment of the present invention.

The processor of the main ground station 110 may generate schedule data so that the main ground station 110 and the plurality of sub-ground stations 120 to 122 do not overlap each other to perform distance measurement to the satellite 100.

To this end, the processor starts the task of measuring the distance to the satellite 100 from each of the main ground stations 110 and the plurality of sub-ground stations 120-122, Ts 310, Ts' 320,. Ts'' 330 may be determined, and the execution time Tp for repeating the task of measuring the distance for each ground station may be determined.

At this time, the processor, when the start of the mission for the distance measurement of the primary ground station 110, Ts (310) is determined, as shown in Equation 1 below, the start of the mission for the distance measurement of the secondary ground station 1 (120) Ts' ( 320).

[Equation 1]

Ts' = Ts + Td + Tr

That is, the start time Ts' 320 for the distance measurement task of the secondary ground station 1 120 is the execution time Td of the distance measurement task at the start time Ts 310 for the distance measurement task of the main ground station 110 and the main ground station After the distance measurement task of (110) is completed, it becomes a value obtained by adding the preparation time Tr required for starting the distance measurement task at the secondary ground station 1 (120).

Similarly, the starting point Ts" 330 for the ranging task of the secondary ground station N 122 may be determined. At this time, the starting point Ts" 330 for the ranging task of the last auxiliary ground station N 122 may be determined as the main ground station ( It should be determined as the time point before the next distance measurement task of 110) starts, which can be expressed as Equation 2 below.

[Equation 2]

Ts"< Ts + Tp-(Td + Tr)

4 is a diagram illustrating a method of measuring a distance to a satellite performed by an auxiliary ground station according to an embodiment of the present invention.

Each of the plurality of secondary ground stations 120 to 122 may include an antenna for measuring a distance to the satellite 100 and a processor for processing data transmitted and received through the antenna.

In step 410, each of the plurality of secondary ground stations 120 to 122 may receive schedule data for measuring a distance from the primary ground station 110 to the satellite 100. At this time, each of the sub-stations 120 to 122 may compare the ground station ID included in the schedule data with its own ground station ID to receive matching schedule data.

In step 420, each of the plurality of sub-ground stations 120 to 122 may automatically measure the distance to the satellite 100 using scenario data that controls the distance measuring equipment according to the received schedule data. . At this time, the scenario data includes data for confirming and controlling the state of the corresponding distance measuring equipment at a time when each of the plurality of secondary ground stations 120 to 122 starts a mission for distance measurement according to the schedule data. .

Each of the plurality of secondary ground stations 120 to 122 may obtain distance information to the satellite 100 by performing distance measurement to the satellite 100 using scenario data according to the generated schedule data. In addition, each of the plurality of sub-ground stations 120 to 122 may acquire information on azimuth and elevation angles, which are satellite tracking information collected from an antenna, which is controlled using scenario data. Each of the plurality of sub-ground stations 120 to 122 uses the distance information to the satellite 100 thus obtained and the azimuth and altitude angle of the antenna to each satellite 100 of the plurality of sub-ground stations 120 to 122. You can generate result data for.

In step 420, each of the plurality of secondary ground stations 120 to 122 may transmit the generated result data to the primary ground station 110. At this time, the result data for the distance measurement to be transmitted is information about the azimuth and elevation angle, which is the satellite tracking information collected from the antenna and the distance information to the satellite 100 acquired by each of the sub-ground stations 120 to 122, respectively. It can contain.

5 is a diagram illustrating a schedule data registration procedure of a ground station according to an embodiment of the present invention.

When the schedule data for measuring the distance to the satellite 100 is generated by the processor of the main ground station 110, each ground station can register the generated schedule data to perform distance measurement.

First, in step 510, each of the plurality of secondary ground stations 120 to 122 may receive schedule data for measuring a distance from the primary ground station 110 to the satellite 100. At this time, each of the sub-ground stations 120 to 122 may select and receive matching schedule data by comparing the ground station ID included in the schedule data with its own ground station ID as in step 520.

If each of the plurality of sub-ground stations 120 to 122 has received schedule data matching its own ground station ID, it is possible to register the received schedule data to perform a task for distance measurement.

To this end, each of the plurality of secondary ground stations 120 to 122 may initialize the count value i to 0 in order to sequentially register schedule data with time in step 530.

In step 540, each of the plurality of secondary ground stations 120 to 122 compares the number of repetitions (N) of the task for distance measurement included in the schedule data, the count, and the value i, so that the count value i is for distance measurement. The task schedule can be registered until the number of repetitions of the task is less than N.

Specifically, each of the plurality of secondary ground stations 120 to 122 sequentially increases the count i to register the mission schedule as in step 550 when the count value i is smaller than the number of repetitions (N) of the mission for distance measurement. It is possible to determine when to start performing a distance measurement task. At this time, the start time of performing the task schedule for the i-th distance measurement may be expressed as Equation 3 below.

[Equation 3]

Ti = Ts + Tp*(i-1)

Thereafter, each of the plurality of sub-ground stations 120 to 122 may register a task for distance measurement at a start point of time corresponding to the count value i, as in step 560.

At this time, when the count value i is equal to or greater than the number of repetitions (N) of the task for distance measurement in the process of registering the task schedule, each of the plurality of auxiliary ground stations 120 to 122 may complete registration of the task schedule.

The process of registering such a mission schedule may be performed in the same manner in the case of the main ground station 110.

6 is a view showing an example of performing a task for distance measurement according to schedule data registered by a ground station according to an embodiment of the present invention.

When the registration of the mission schedule for distance measurement is completed through the process of FIG. 5, each ground station may wait until the start time of the first registered mission schedule, as in step 610.

If it is determined that the current time is the start point of the first registered mission schedule, each ground station automatically measures the distance to the satellite 100 by using scenario data controlling the distance measuring equipment in step 620. Result data can be generated. In this case, the scenario data includes data for checking and controlling the state of the corresponding distance measuring device at the time when the main ground station 110 starts the mission for distance measurement according to the schedule data.

Thereafter, in step 630, each ground station may set the count value i to 1 to start the next registered mission schedule.

In step 640, each ground station compares the number of repetitions (N) of the task for distance measurement included in the schedule data with the count value i, and the count value i is less than the number of repetitions (N) of the task for distance measurement. Until the task for distance measurement can be performed through the registered task schedule, and when all task schedules are performed, the task for distance measurement can be completed.

At this time, the execution time for each ground station to perform the registered mission schedule is determined as the time obtained by adding the execution period (Tp) of the distance measurement task multiplied by the count value i to the starting point (Ts) of the distance measurement task. Can.

Thereafter, each ground station may determine whether the current time is the start time of the next registered task schedule, as in step 650, when the count value i is smaller than the number of times of repetition of the task for distance measurement (N).

If the current time is determined to be the start time of the next registered mission schedule, each ground station increases the count value i as in step 660 to designate the number of the registered mission schedule, and the designated mission as in step 670. A distance measurement task corresponding to a number of schedules can be performed.

At this time, when there is no mission schedule to be performed, each ground station uses distance information to the satellite 100 obtained by performing a distance measurement mission and information on azimuth and elevation angles, which are satellite tracking information collected from an antenna. To generate the result data, a plurality of sub-ground stations 120 to 122 may transmit the generated result data to the main ground station 110.

As described above, the present invention acquires distance measurement result data required for orbit prediction of the satellite 100 by using a plurality of ground stations instead of a single ground station, and automates the task for distance measurement, thereby accurately correcting the satellite 100 in a short time. You can predict the trajectory.

The device described above may be implemented with hardware components, software components, and/or combinations of hardware components and software components. For example, the devices and components described in the embodiments include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors (micro signal processors), microcomputers, field programmable gate arrays (FPGAs). , A programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions, may be implemented using one or more general purpose computers or special purpose computers. The processing device may run an operating system (OS) and one or more software applications running on the operating system. In addition, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of understanding, a processing device may be described as one being used, but a person having ordinary skill in the art, the processing device may include a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that may include. For example, the processing device may include a plurality of processors or a processor and a controller. In addition, other processing configurations, such as parallel processors, are possible.

The software may include a computer program, code, instruction, or a combination of one or more of these, and configure the processing device to operate as desired, or process independently or collectively You can command the device. Software and/or data may be interpreted by a processing device or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodied in the transmitted signal wave. The software may be distributed on networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the medium may be specially designed and constructed for the embodiments or may be known and usable by those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specifically configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described by a limited embodiment and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques are performed in a different order than the described method, and/or the components of the described system, structure, device, circuit, etc. are combined or combined in a different form from the described method, or other components Alternatively, even if replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

100: satellite
110: main ground station
120: secondary ground station 1
121: secondary ground station 2
122: secondary ground station N
130: Internet network

Claims (10)

In the method of measuring the distance to a satellite performed by the main ground station,
Generating schedule data for measuring a distance to the satellite for each of the primary ground station and the plurality of secondary ground stations;
Transmitting the generated schedule data to each of the plurality of secondary ground stations;
Performing distance measurement to the satellite using scenario data for controlling distance measuring equipment included in the main ground station according to the generated schedule data;
Receiving a result of measuring a distance to the satellite performed by each of the plurality of sub-ground stations according to the generated schedule data;
Generating result data for the satellite by merging the distance measurement result performed by the primary ground station and the distance measurement result received from each of the plurality of secondary ground stations; And
Predicting the orbit of the satellite using the generated result data
Including,
The step of generating the schedule data,
The start time for the distance measurement task of the primary ground station, the execution time for the primary ground station to perform the distance measurement task, the execution cycle for the next distance measurement task of the primary ground station, and the preparation time for the distance measurement task of the secondary ground stations Create the schedule data using
The starting point for the distance measurement task of the last ground station among the plurality of sub-ground stations is determined by a time point before the next distance measurement task of the main ground station is started. According to claim 1,
The step of generating the schedule data,
The distance measuring method of adjusting so that the mission time for the distance measurement performed by each of the primary ground station and the plurality of secondary ground stations does not overlap with each other. According to claim 1,
The schedule data,
A distance measurement method comprising at least one of an ID assigned to each of the main ground station and a plurality of sub-ground stations, a start time of a task for distance measurement, a number of repetitions of a task for distance measurement, and a performance cycle of a task for distance measurement . According to claim 3,
The scenario data,
A distance measuring method in which the main ground station checks the state of the distance measuring device at the start of a task for measuring distance included in the schedule data, and includes data for controlling the distance measuring device. In the method of measuring the distance to the satellite performed by the secondary ground station,
Receiving schedule data for measuring a distance from the main ground station to the satellite;
Performing distance measurement to the satellite using scenario data for controlling the distance measuring equipment included in the secondary ground station according to the received schedule data; And
Transmitting a distance measurement result to the satellite to the main ground station
Including,
The schedule data,
The start time for the distance measurement task of the primary ground station, the execution time for the primary ground station to perform the distance measurement task, the execution cycle for the next distance measurement task of the primary ground station, and the preparation time for the distance measurement task of the secondary ground stations Is created on the basis of,
A starting method for a distance measuring task of the last ground station among a plurality of sub-ground stations is determined by a time point before the next distance measuring task of the main ground station is started. The method of claim 5,
The schedule data,
The distance measuring method adjusted so that the mission time for the distance measurement performed by each of the primary ground station and the plurality of secondary ground stations does not overlap with each other. The method of claim 5,
The schedule data,
A distance measurement method comprising at least one of an ID assigned to each of the main ground station and a plurality of sub-ground stations, a start time of a task for distance measurement, a number of repetitions of a task for distance measurement, and a performance cycle of a task for distance measurement . The method of claim 7,
The scenario data,
Each of the plurality of sub-ground stations checks the state of the distance measuring device at the start of a task for measuring distance included in the schedule data, and includes a method for controlling the distance measuring device. An antenna for measuring distance information from the main ground station to the satellite; And
Processor for predicting the orbit of the satellite based on the distance information received through the antenna
Including,
The processor,
The satellite is generated by generating schedule data for measuring the distance to the satellite for each of the primary ground station and the plurality of secondary ground stations, and using scenario data to control the antenna included in the primary ground station according to the generated schedule data. The distance measurement to the satellite is performed, and the distance measurement result to the satellite performed by the main ground station and the distance measurement result to the satellite measured by the schedule data are measured by the plurality of sub-ground stations, respectively. Predict the orbit,
The schedule data,
The start time for the distance measurement task of the primary ground station, the execution time for the primary ground station to perform the distance measurement task, the execution cycle for the next distance measurement task of the primary ground station, and the preparation time for the distance measurement task of the secondary ground stations Is created on the basis of,
The starting point for the distance measurement task of the last ground station among the plurality of sub-ground stations is determined as a time point before the next distance measurement task of the main ground station is started. The method of claim 9,
The schedule data,
The mission time for the distance measurement performed by each of the main ground station and the plurality of sub-ground stations is adjusted so as not to overlap with each other, and the ID given to each of the main ground station and the plurality of sub-ground stations, the start time of the task for distance measurement, A distance measuring device including at least one of the number of repetitions of a task for distance measurement and a performance cycle of a task for distance measurement.

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