Satellite data transmission antenna tracking test system and method

Abstract

The application provides a satellite data transmission antenna tracking test system and method, comprising a data transmission antenna rotation simulator, an attitude and orbit control dynamics device, a GNSS simulator, a measurement and control link device, a telemetry analysis device and a tracking deviation measurement device, and can test the correctness of the cooperation of the on-board computer, the mechanism driver and other on-board devices to realize the data transmission antenna tracking algorithm, and obtain the deviation between the theoretical calculation result and the engineering measurement result of the data transmission antenna tracking algorithm, verify the index compliance of the tracking pointing deviation, and ensure that the satellite can accurately establish and maintain the communication link when transmitting data with the ground station after being launched into orbit.

Description

Technical Field

[0001] This invention relates to the field of spacecraft testing technology, and more specifically, to a satellite data transmission antenna tracking test system and method. Background Technology

[0002] During its flight in orbit, the remote sensing satellite transmits remote sensing data to the ground station via its onboard data transmission antenna. When the satellite enters the visible orbit segment of the ground station, the onboard computer runs a data transmission antenna tracking algorithm to control the data transmission antenna to point towards the ground station, establish a wireless transmission link with the ground station, and control the data transmission antenna to track the ground station during the visible orbit segment of the flight to maintain the wireless transmission link with the ground station.

[0003] With the development of space-to-ground communication technology and the increasing demand for massive data transmission, spaceborne data transmission antennas are evolving towards higher gain, higher precision pointing and tracking. Whether the spaceborne data transmission antenna can accurately track and point at the ground station is a crucial factor affecting space-to-ground data transmission. To ensure the effectiveness and reliability of the space-to-ground data transmission link during satellite flight, the engineering implementation effect of the data transmission antenna tracking algorithm needs to be verified during satellite ground testing. This includes verifying the correctness of the data transmission antenna tracking function and the tracking and pointing accuracy through the collaborative work of spaceborne equipment such as the spaceborne computer and mechanism actuator.

[0004] The invention patent with publication number CN106301511A discloses a satellite-borne data transmission antenna relay transmission system to the ground and its control method, which can increase the data transmission time between the satellite and the ground, thereby enabling a large amount of satellite data to be transmitted to the ground in a timely manner. The invention describes a method for relay tracking of ground stations by a data transmission antenna, but does not support the verification function of the data transmission antenna tracking algorithm and tracking effect.

[0005] Currently, no other similar technologies have been found or reported, and no other similar information has been collected domestically or internationally.

[0006] Therefore, a satellite data transmission antenna tracking and testing system is needed to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a satellite data transmission antenna tracking test system and method.

[0008] A satellite data transmission antenna tracking test system provided by the present invention includes: a data transmission antenna rotation simulator, an attitude and orbit control dynamics device, a GNSS simulator, a telemetry and control link device, a telemetry analysis device, and a tracking deviation calculation device;

[0009] The data transmission antenna rotation simulator is connected to the satellite, receives the numerical control antenna drive signal, and returns the rotation angle telemetry signal of the data transmission antenna.

[0010] The attitude and orbit control dynamics equipment is connected to the satellite and the GNSS simulator respectively to perform satellite dynamics and kinematic simulation calculations, and to send flight parameters to the GNSS simulator;

[0011] The GNSS simulator is connected to the satellite, generates navigation simulation signals based on flight parameters, and sends them to the satellite;

[0012] The telemetry and control link equipment is connected to the satellite, processes the satellite downlink telemetry signals, and outputs satellite telemetry frame data to the telemetry analysis equipment.

[0013] The telemetry analysis device is connected to the telemetry and control link device, analyzes satellite telemetry frame data, and transmits the telemetry analysis results to the tracking deviation calculation device.

[0014] The tracking deviation measurement device is connected to the telemetry analysis device, receives the telemetry analysis results, extracts the measured data during the data transmission antenna tracking process and compares it with the theoretical calculation data, calculates the tracking deviation and evaluates whether it meets the predetermined indicators.

[0015] Preferably, the data transmission antenna rotation simulator is used to simulate the mechanical rotation function of the on-board data transmission antenna in both the X and Y axes, and returns the telemetry signals of the rotation angles of the data transmission antenna in the X and Y axes.

[0016] Preferably, the attitude and orbit control dynamics device outputs excitation signals to the sensors of the satellite attitude and orbit control subsystem according to the initial simulation values ​​set by the user, and collects the output signals of the thrusters and reaction flywheel actuators of the satellite attitude and orbit control subsystem to perform satellite dynamics and kinematic simulation calculations, thereby realizing the simulation of the satellite's on-orbit flight process.

[0017] Preferably, the telemetry and control link equipment receives satellite downlink telemetry signals, performs power attenuation, downconversion, and demodulation processing on the satellite downlink telemetry signals, outputs satellite telemetry frame data, and sends the satellite telemetry frame data to the telemetry analysis equipment;

[0018] The telemetry analysis device receives satellite telemetry frame data and sequentially performs telemetry frame analysis, telemetry packet extraction, telemetry channel segmentation, and telemetry physical quantity conversion processing. It then sends the converted telemetry physical quantity data to the tracking deviation measurement device.

[0019] Preferably, the extraction of measured data during the data transmission antenna tracking process includes:

[0020] Based on the telemetry code, the telemetry data of "data transmission antenna operating mode", "data transmission antenna X-axis pointing angle", "data transmission antenna Y-axis pointing angle" and the corresponding "satellite system time" are retrieved from the satellite telemetry physical quantity data. The telemetry status of "data transmission antenna operating mode" is determined. When the telemetry status of "data transmission antenna operating mode" changes from "stop and hold" to "tracking mode", the telemetry values ​​of "data transmission antenna X-axis pointing angle", "data transmission antenna Y-axis pointing angle" and the corresponding "satellite system time" are continuously recorded until the telemetry status of "data transmission antenna operating mode" changes from "tracking mode" to "stop and hold", at which point the recording stops.

[0021] Preferably, the method for calculating the tracking deviation using the tracking deviation measuring device includes:

[0022] The measured data of the data transmission antenna tracking process and the theoretical calculation data of the data transmission antenna tracking algorithm program are aligned in time. The difference between the measured data and the theoretical calculation data at the same time is calculated to finally obtain the pointing time angle deviation sequence.

[0023] Preferably, the evaluation of whether the predetermined indicators are met includes:

[0024] The X-axis pointing angle deviation and Y-axis pointing angle deviation in the pointing time angle deviation sequence are compared with the data transmission antenna tracking accuracy index set by the user. If the X-axis pointing angle deviation and Y-axis pointing angle deviation are not greater than the data transmission antenna tracking accuracy index, the test is deemed to meet the requirements; otherwise, the test is deemed to fail to meet the requirements.

[0025] Preferably, the attitude and orbit control dynamics device sends satellite flight parameters to the GNSS simulator at set intervals; the GNSS simulator generates a navigation simulation signal in real time based on the received flight parameters, and the time in the navigation simulation signal is consistent with the time of the attitude and orbit control dynamics device; after receiving the navigation simulation signal, the satellite calculates the time and provides time synchronization to the satellite's central control computer, setting the satellite's onboard system time to be consistent with the time in the GNSS navigation simulation signal.

[0026] A test method for a satellite data transmission antenna tracking test system provided by the present invention includes:

[0027] Step S1: Power on the satellite and test system, set the initial simulation values ​​of the attitude and orbit control dynamics equipment. The initial simulation values ​​are consistent with the initial orbit parameters of the data transmission antenna tracking algorithm program for a certain ground station and a certain orbit segment.

[0028] In step S2, the GNSS simulator receives satellite flight parameters and generates corresponding navigation simulation signals. The satellite calculates the time based on the navigation simulation signals and synchronizes it with the satellite's onboard system time.

[0029] Step S3: Simultaneously start the closed-loop operation of the attitude and orbit control dynamics equipment and the wheel control flight mode of the satellite attitude and orbit control subsystem to begin the simulation of the on-orbit flight process of the satellite under test.

[0030] Step S4: Send a data transmission antenna tracking task program control command packet to the satellite master control computer. The start and end times of ground station and data transmission antenna tracking specified in the command packet are consistent with the start and end times of ground station and data transmission antenna tracking in step S1.

[0031] In step S4, the satellite master control computer executes the data transmission antenna tracking task according to the on-board system time program. During the task execution, the data transmission antenna tracks the ground station, and the data transmission antenna mechanism driver drives the X and Y axes of the data transmission antenna rotation simulator to rotate.

[0032] Step S5: After the execution of the data transmission antenna tracking task program control instruction package, the tracking deviation calculation device completes the recording of the measured data of the data transmission antenna tracking process, calculates the difference between the measured data and the theoretical calculation data of the pre-entered data transmission antenna tracking algorithm program, and generates the tracking deviation calculation result and the tracking deviation index compliance judgment result.

[0033] Preferably, during the data transmission antenna tracking test, all ground stations used during in-orbit flight are traversed, and a visible orbit segment is selected for each ground station to perform the tests in steps S1 to S5. If the tracking deviations generated by the test all meet the index requirements, it is determined that the data transmission antenna tracking function and program of the satellite under test meet the requirements; otherwise, it is determined that the data transmission antenna tracking function and program of the satellite under test do not meet the requirements.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This invention can test the correctness of the data transmission antenna tracking algorithm implemented by the collaborative work of onboard equipment such as onboard computers and mechanism drivers, and obtain the deviation between the theoretical calculation results and the engineering measurement results of the data transmission antenna tracking algorithm, verify the compliance of the tracking pointing deviation index, and ensure that the communication link can be accurately established and maintained when the satellite transmits data with the ground station after launch and entering orbit. Attached Figure Description

[0036] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 A block diagram of the components of a satellite data transmission antenna tracking test system. Detailed Implementation

[0038] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0039] This invention provides a satellite data transmission antenna tracking test system, referring to... Figure 1 As shown, the system specifically includes: a data transmission antenna rotation simulator, an attitude and orbit control dynamics device, a GNSS simulator, a telemetry and control link device, a telemetry analysis device, and a tracking deviation calculation device. The data transmission antenna rotation simulator simulates the mechanical rotation of the antenna and provides feedback on the rotation angle; the attitude and orbit control dynamics device simulates the satellite's on-orbit flight process and provides flight parameters to the GNSS simulator; the GNSS simulator generates navigation signals based on these parameters and sends them to the satellite's GNSS receiver; the telemetry and control link device processes downlink telemetry signals and outputs telemetry frame data; the telemetry analysis device analyzes these data and converts them into physical quantities; finally, the tracking deviation calculation device analyzes the deviation between the measured data and the theoretically calculated data, evaluates the tracking accuracy, and ensures that the satellite can accurately establish and maintain a data transmission link with the ground station after launch. This system is used to verify the correctness of the data transmission antenna tracking algorithm under the collaborative operation of onboard computers, mechanism actuators, and other equipment, and to ensure that a communication link can be accurately established and maintained with the ground station during on-orbit flight.

[0040] The following is a detailed explanation of this system:

[0041] Data transmission antenna rotation simulator: It is connected to the satellite data transmission antenna mechanism driver via a low-frequency cable. On the one hand, it receives the drive signal output by the satellite data transmission antenna mechanism driver to simulate the mechanical rotation function of the on-board data transmission antenna in the X and Y axes. On the other hand, it returns the telemetry signals of the rotation angle of the data transmission antenna in the X and Y axes to the on-board data transmission antenna drive controller.

[0042] Attitude and orbit control dynamics equipment: On the one hand, it connects to the satellite attitude and orbit control subsystem via a low-frequency cable, outputs excitation signals to the sensors of the satellite attitude and orbit control subsystem according to the user-set simulation initial values, and collects the output signals of the actuators such as the thrusters and reaction wheels of the satellite attitude and orbit control subsystem to perform satellite dynamics and kinematic simulation calculations, thereby realizing the simulation of the satellite's on-orbit flight process; on the other hand, it connects to the GNSS simulator via a local area network, and sends flight parameters such as satellite position, attitude, and corresponding time to the GNSS simulator in real time.

[0043] GNSS simulator: On the one hand, it connects to the attitude and orbit control dynamics equipment via a local area network and generates corresponding navigation simulation signals in real time based on the satellite position, attitude, and time sent by the attitude and orbit control dynamics equipment; on the other hand, it connects to the satellite GNSS receiver via a wired connection through an RF cable or via a wireless connection through an RF cable, a ground GNSS transmitting antenna, or a spaceborne GNSS receiving antenna, and sends navigation simulation signals to the satellite GNSS receiver.

[0044] Telemetry and control link equipment: It connects to the satellite telemetry and control transponder via a wired connection using an RF cable or via a wireless connection using an RF cable, a ground telemetry and control antenna, or a satellite telemetry and control antenna. It receives satellite downlink telemetry signals, performs power attenuation, downconversion, demodulation, and other processing on the satellite downlink telemetry signals, and then outputs satellite telemetry frame data. It also connects to the telemetry analysis equipment via a local area network to send the satellite telemetry frame data to the telemetry analysis equipment.

[0045] Telemetry analysis equipment: It connects to the telemetry and control link equipment and the tracking deviation calculation equipment via a local area network, receives satellite telemetry frame data sent by the telemetry and control link equipment, and performs processing such as telemetry frame parsing, telemetry packet extraction, telemetry channel segmentation and telemetry physical quantity conversion in sequence, and sends the converted telemetry physical quantity data to the tracking deviation calculation equipment.

[0046] Tracking deviation measurement equipment: It connects to the telemetry analysis equipment via a local area network, continuously receives satellite telemetry physical quantity data, extracts the measured data of the data transmission antenna tracking process, compares the measured data with the theoretical calculation data of the data transmission antenna tracking algorithm program, calculates the tracking deviation, and judges the compliance of the tracking deviation with the index.

[0047] In this invention, the tracking deviation measurement device extracts the measured data of the data transmission antenna tracking process as follows: Based on the telemetry code, it retrieves the telemetry values ​​of "data transmission antenna working mode," "data transmission antenna X-axis pointing angle," "data transmission antenna Y-axis pointing angle," and the corresponding "satellite system time" from the satellite telemetry physical quantity data. It then determines the telemetry state of the "data transmission antenna working mode." When the telemetry state changes from "stop and hold" to "tracking mode," it continuously records the telemetry values ​​of "data transmission antenna X-axis pointing angle," "data transmission antenna Y-axis pointing angle," and the corresponding "satellite system time" until the telemetry state changes from "tracking mode" to "stop and hold," at which point recording stops. The final measured data has the same format as the theoretical calculation data of the data transmission antenna tracking algorithm program, both being pointing time-angle sequences (t, X, Y) during the data transmission antenna tracking process, where t is the satellite system time, X is the data transmission antenna X-axis pointing angle, and Y is the data transmission antenna Y-axis pointing angle.

[0048] In one specific implementation, the tracking deviation calculation device calculates the tracking deviation by aligning the measured data of the data transmission antenna tracking process with the theoretical calculation data of the data transmission antenna tracking algorithm program according to time t, performing difference calculation on the measured data and theoretical calculation data at the same time, and finally obtaining the pointing time angle deviation sequence (t, ΔX, ΔY), where t is the satellite system time, ΔX is the absolute value of the difference between the measured value and the theoretical calculation value of the X-axis pointing angle of the data transmission antenna at the same time, and ΔY is the absolute value of the difference between the measured value and the theoretical calculation value of the Y-axis pointing angle of the data transmission antenna at the same time.

[0049] In one specific implementation, the process for the tracking deviation measurement device to determine the compliance of the tracking deviation is as follows: the X-axis pointing angle deviation ΔX and the Y-axis pointing angle deviation ΔY in the pointing time angle deviation sequence (t, ΔX, ΔY) are compared one by one with the data transmission antenna tracking accuracy index set by the user. If the X-axis pointing angle deviation ΔX and the Y-axis pointing angle deviation ΔY are both not greater than the data transmission antenna tracking accuracy index, then the test is determined to meet the requirements; if there is an X-axis pointing angle deviation ΔX or a Y-axis pointing angle deviation ΔY that is greater than the data transmission antenna tracking accuracy index, then the test is determined to not meet the requirements, and the out-of-tolerance pointing time angle deviation data (t, ΔX, ΔY) is extracted into a .csv file.

[0050] During the operation of this system, the time synchronization process is as follows: the attitude and orbit control dynamics equipment sends flight parameters such as satellite position, attitude, and corresponding time to the GNSS simulator every 100ms; the GNSS simulator generates a navigation simulation signal in real time based on the received flight parameters, and the time in the navigation simulation signal is consistent with the time of the attitude and orbit control dynamics equipment; the satellite GNSS receiver receives the navigation simulation signal generated by the GNSS simulator, calculates the time, and then performs time synchronization with the satellite master control computer, setting the satellite on-board system time to be consistent with the time in the GNSS navigation simulation signal, thereby achieving synchronization between the simulated time of the satellite's on-orbit flight process in the attitude and orbit control dynamics equipment and the on-board system time of the tested satellite.

[0051] This invention also provides a test method for a satellite data transmission antenna tracking test system, comprising the following steps:

[0052] Step S1: After the satellite and test system are powered on, set the initial simulation values ​​of the attitude and orbit control dynamics equipment. The initial simulation values ​​are consistent with the initial orbit parameters of the data transmission antenna tracking algorithm program for a certain ground station and a certain orbit segment.

[0053] Step S2: The GNSS simulator receives the satellite flight parameters sent by the attitude and orbit control dynamics device, generates the corresponding navigation simulation signal, and sends it to the satellite GNSS receiver. After the GNSS receiver calculates the time, it sends a GNSS timing command to synchronize the satellite on-board system time with the GNSS navigation simulation signal time and the attitude and orbit control dynamics device simulation time.

[0054] Step S3: Simultaneously start the closed-loop operation of the attitude and orbit control dynamics equipment and the wheel control flight mode of the satellite attitude and orbit control subsystem to begin the simulation of the on-orbit flight process of the satellite under test.

[0055] Step S4: Send a data transmission antenna tracking task program control command packet to the satellite master control computer. The start and end times of ground station and data transmission antenna tracking specified in the command packet are consistent with the start and end times of ground station and data transmission antenna tracking in the example described in step S1.

[0056] In step S4, the satellite master control computer executes the data transmission antenna tracking task according to the on-board system time program. During the task execution, the data transmission antenna tracks the ground station, and the data transmission antenna mechanism driver drives the X and Y axes of the data transmission antenna rotation simulator to rotate.

[0057] Step S5: After the execution of the data transmission antenna tracking task program control instruction package, the tracking deviation calculation device completes the recording of the measured data of the data transmission antenna tracking process, calculates the difference between the measured data and the theoretical calculation data of the pre-entered data transmission antenna tracking algorithm program, and generates the tracking deviation calculation result and the tracking deviation index compliance judgment result.

[0058] Based on the above method, when conducting data transmission antenna tracking tests, it is necessary to traverse all ground stations used during in-orbit flight. That is, for each ground station, a visible orbit segment is selected for testing steps S1 to S5. If the tracking deviations generated by the tests all meet the index requirements, it is determined that the data transmission antenna tracking function and program of the tested satellite meet the requirements.

[0059] The satellite data transmission antenna tracking test system and method provided in this invention can test the correctness of the data transmission antenna tracking algorithm implemented by the collaborative work of onboard equipment such as onboard computers and mechanism drivers, and obtain the deviation between the theoretical calculation results and the engineering measurement results of the data transmission antenna tracking algorithm, verify the compliance of the tracking pointing deviation index, and ensure that the communication link can be accurately established and maintained when the satellite transmits data with the ground station after launch and orbit.

[0060] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A test method for a satellite data transmission antenna tracking test system, characterized in that, include: Step S1: Power on the satellite and test system, set the initial simulation values ​​of the attitude and orbit control dynamics equipment. The initial simulation values ​​are consistent with the initial orbit parameters of the data transmission antenna tracking algorithm program for a certain ground station and a certain orbit segment. In step S2, the GNSS simulator receives the satellite flight parameters and generates the corresponding navigation simulation signal. The satellite calculates the time based on the navigation simulation signal and synchronizes it to the satellite's onboard system time. Step S3: Simultaneously start the closed-loop operation of the attitude and orbit control dynamics equipment and the wheel control flight mode of the satellite attitude and orbit control subsystem to begin the simulation of the on-orbit flight process of the satellite under test. Step S4: Send a data transmission antenna tracking task program control command packet to the satellite master control computer. The start and end times of ground station and data transmission antenna tracking specified in the command packet are consistent with the start and end times of ground station and data transmission antenna tracking in step S1. Step S5: The satellite master control computer executes the data transmission antenna tracking task according to the on-board system time program. During the task execution, the data transmission antenna tracks the ground station and drives the X and Y axes of the data transmission antenna rotation simulator to rotate via the data transmission antenna mechanism driver. Step S6: After the execution of the data transmission antenna tracking task program control instruction package, the tracking deviation calculation device completes the recording of the measured data of the data transmission antenna tracking process, calculates the difference between the measured data and the theoretical calculation data of the pre-entered data transmission antenna tracking algorithm program, and generates the tracking deviation calculation result and the tracking deviation index compliance judgment result. The satellite data transmission antenna tracking test system includes: a data transmission antenna rotation simulator, an attitude and orbit control dynamics device, a GNSS simulator, a telemetry and control link device, a telemetry analysis device, and a tracking deviation calculation device; The data transmission antenna rotation simulator is connected to the satellite, receives the numerical control antenna drive signal, and returns the rotation angle telemetry signal of the data transmission antenna. The attitude and orbit control dynamics equipment is connected to the satellite and the GNSS simulator respectively to perform satellite dynamics and kinematics simulation calculations, and to send flight parameters to the GNSS simulator; The GNSS simulator is connected to the satellite, generates navigation simulation signals based on flight parameters, and sends them to the satellite; the time in the navigation simulation signals is consistent with the time of the attitude and orbit control dynamics equipment. The telemetry and control link equipment is connected to the satellite, processes the satellite downlink telemetry signals, and outputs satellite telemetry frame data to the telemetry analysis equipment. The telemetry analysis device is connected to the telemetry and control link device, analyzes satellite telemetry frame data, and transmits the telemetry analysis results to the tracking deviation calculation device. The tracking deviation measurement device is connected to the telemetry analysis device, receives the telemetry analysis results, extracts the measured data during the data transmission antenna tracking process and compares it with the theoretical calculation data, calculates the tracking deviation and evaluates whether it meets the predetermined indicators.

2. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, During the data transmission antenna tracking test, all ground stations used during in-orbit flight are traversed. For each ground station, a visible orbit segment is selected for testing steps S1 to S6. If the tracking deviations generated by the test all meet the index requirements, it is determined that the data transmission antenna tracking function and program of the satellite under test meet the requirements; otherwise, it is determined that the data transmission antenna tracking function and program of the satellite under test do not meet the requirements.

3. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, The data transmission antenna rotation simulator is used to simulate the mechanical rotation function of the on-board data transmission antenna in the X and Y axes, and returns the telemetry signals of the rotation angle of the data transmission antenna in the X and Y axes.

4. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, The attitude and orbit control dynamics equipment outputs excitation signals to the sensors of the satellite attitude and orbit control subsystem based on the initial simulation values ​​set by the user, and collects the output signals of the thrusters and reaction flywheel actuators of the satellite attitude and orbit control subsystem to perform satellite dynamics and kinematic simulation calculations, thereby realizing the simulation of the satellite's on-orbit flight process.

5. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, The telemetry and control link equipment receives satellite downlink telemetry signals, performs power attenuation, downconversion, and demodulation processing on the satellite downlink telemetry signals, and outputs satellite telemetry frame data, which is then sent to the telemetry analysis equipment. The telemetry analysis device receives satellite telemetry frame data and sequentially performs telemetry frame analysis, telemetry packet extraction, telemetry channel segmentation, and telemetry physical quantity conversion processing. It then sends the converted telemetry physical quantity data to the tracking deviation measurement device.

6. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, The measured data extracted during the data transmission antenna tracking process includes: Based on the telemetry code, the "data transmission antenna operating mode", "data transmission antenna X-axis pointing angle", "data transmission antenna Y-axis pointing angle" and the corresponding "satellite system time" telemetry values ​​are retrieved from the satellite telemetry physical quantity data. The telemetry status of the "data transmission antenna operating mode" is determined. When the telemetry status of the "data transmission antenna operating mode" changes from "stop and hold" to "tracking mode", the telemetry values ​​of the "data transmission antenna X-axis pointing angle", "data transmission antenna Y-axis pointing angle" and the corresponding "satellite system time" are continuously recorded until the telemetry status of the "data transmission antenna operating mode" changes from "tracking mode" to "stop and hold", at which point the recording stops.

7. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, The method for calculating the tracking deviation using the tracking deviation measurement device includes: The measured data of the data transmission antenna tracking process and the theoretical calculation data of the data transmission antenna tracking algorithm program are aligned in time. The difference between the measured data and the theoretical calculation data at the same time is calculated to finally obtain the pointing time angle deviation sequence.

8. The satellite data transmission antenna tracking test method according to claim 7, characterized in that, The assessment of whether the predetermined indicators are met includes: The X-axis pointing angle deviation and Y-axis pointing angle deviation in the pointing time angle deviation sequence are compared with the data transmission antenna tracking accuracy index set by the user. If the X-axis pointing angle deviation and Y-axis pointing angle deviation are not greater than the data transmission antenna tracking accuracy index, the test is deemed to meet the requirements; otherwise, the test is deemed to fail to meet the requirements.

9. The satellite data transmission antenna tracking test method according to claim 1, characterized in that, The attitude and orbit control dynamics device sends satellite flight parameters to the GNSS simulator at set intervals; the GNSS simulator generates navigation simulation signals in real time based on the received flight parameters, and the time in the navigation simulation signals is consistent with the time of the attitude and orbit control dynamics device; after receiving the navigation simulation signals, the satellite calculates the time and provides time synchronization to the satellite's central control computer, setting the satellite's onboard system time to be consistent with the time in the GNSS navigation simulation signals.

Images