CN110011725B - Relay satellite tracking method and device - Google Patents
Relay satellite tracking method and device Download PDFInfo
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- CN110011725B CN110011725B CN201910379044.2A CN201910379044A CN110011725B CN 110011725 B CN110011725 B CN 110011725B CN 201910379044 A CN201910379044 A CN 201910379044A CN 110011725 B CN110011725 B CN 110011725B
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- 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
- H04B7/18513—Transmission in a satellite or space-based system
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Abstract
The invention provides a relay satellite tracking method and a device, which relate to the technical field of space-based measurement and control and comprise the steps of establishing an SSA link with a target terminal; receiving the current position returned by the target terminal through the SSA link; generating an antenna correction parameter according to the current position and a preset position of a target terminal; and sending the antenna correction parameters to the relay satellite so that the relay satellite performs antenna pointing correction. The invention can acquire the actual position of the target terminal by establishing the SSA link, and finally enables the antenna to point to the actual position of the target terminal according to the deviation between the actual position and the preset position, thereby solving the problem of inaccurate pointing of the antenna and realizing the stable high-speed transmission of signals.
Description
Technical Field
The invention relates to the technical field of space-based measurement and control, in particular to a relay satellite tracking method and a relay satellite tracking device.
Background
The relay satellite is one kind of communication satellite, is mainly used for data transmission and features great data transmission amount. The relay satellite can provide data relay and measurement and control service for spacecrafts such as satellites and spacecrafts, and the use benefit and the emergency capability of various satellites are greatly improved. The existing tracking method can well meet the tracking requirement of a spacecraft target, but risks exist or even the targets are not available for various non-spacecraft targets, for example, the targets are particularly suitable for a ship-borne target, the running track and the posture of the ship-borne target have randomness and are often separated from a preset track, and the stable transmission of signals is influenced.
Disclosure of Invention
In view of this, the present invention provides a relay satellite tracking method and apparatus, which can meet the communication requirement that the operation trajectory and the attitude of a ship-borne target and the like have random targets, and ensure stable transmission of signals.
In a first aspect, an embodiment of the present invention provides a relay satellite tracking method, including: establishing an S-band Single Address (SSA) link with a target terminal; receiving the current position returned by the target terminal through the SSA link; generating an antenna correction parameter according to the current position and a preset position of a target terminal; and sending the antenna correction parameters to the relay satellite so that the relay satellite performs antenna pointing correction.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the step of establishing an SSA link with a target terminal includes: sending a forward SSA link establishment signal to a target terminal; receiving a network access application fed back by a target terminal according to a forward link establishment signal; and carrying out identity recognition on the target terminal according to the network access application, and establishing an SSA link according to an identity recognition result.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where before the step of establishing an SSA link with the target terminal, the method further includes: generating a control parameter according to a preset position of a target terminal; and sending the control parameters to the relay satellite so that the antenna of the relay satellite points to the preset position of the target terminal.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the step of generating an antenna correction parameter according to a current location and a predetermined location of a target terminal includes: calculating a difference between the current position and a predetermined position of the target terminal; and if the difference is larger than the preset threshold, generating an antenna correction parameter according to the difference.
With reference to the first aspect or any one of its possible implementation manners, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where after the step of sending the antenna correction parameter to the relay satellite so that the relay satellite performs the antenna pointing correction, the method further includes: and controlling the relay satellite to establish a Ka link with the target terminal.
In a second aspect, an embodiment of the present invention further provides a relay satellite tracking apparatus, including: the SSA link module is used for establishing an SSA link with a target terminal; the position module is used for receiving the current position returned by the target terminal through the SSA link; the parameter module is used for generating antenna correction parameters according to the current position and the preset position of the target terminal; and the correction module is used for sending the antenna correction parameters to the relay satellite so as to enable the relay satellite to perform antenna pointing correction.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the SSA link module is further configured to: sending a forward SSA link establishment signal to a target terminal; receiving a network access application fed back by a target terminal according to a forward link establishment signal; and carrying out identity recognition on the target terminal according to the network access application, and establishing an SSA link according to an identity recognition result.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the SSA link module is further configured to: generating a control parameter according to a preset position of a target terminal; and sending the control parameters to the relay satellite so that the antenna of the relay satellite points to the preset position of the target terminal.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the parameter module is further configured to: calculating a difference between the current position and a predetermined position of the target terminal; and if the difference is larger than the preset threshold, generating an antenna correction parameter according to the difference.
With reference to the second aspect or any one of its possible implementations, an embodiment of the present invention provides a fourth possible implementation of the second aspect, where the apparatus further includes a Ka link module, configured to: and controlling the relay satellite to establish a Ka link with the target terminal.
The embodiment of the invention has the following beneficial effects: the embodiment of the invention provides a relay satellite tracking method and a device, wherein an SSA link between the relay satellite tracking method and a target terminal is established, the characteristic that the coverage range of an S frequency band of the relay satellite is large can be utilized, the current position of the target terminal returned by the target terminal through the SSA link is received, a correction parameter between the current position and a preset position is calculated, and the relay satellite is controlled to correct the antenna pointing direction through the correction parameter. The embodiment of the invention can acquire the actual position of the target terminal by establishing the SSA link, and finally enable the antenna to point to the actual position of the target terminal according to the deviation between the actual position and the preset position, thereby solving the problem of inaccurate pointing of the antenna and realizing the stable high-speed transmission of signals.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a relay satellite tracking method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an implementation of a relay satellite tracking method according to an embodiment of the present invention;
fig. 3 is a block diagram of a relay satellite tracking device according to an embodiment of the present invention;
fig. 4 is another structural block diagram of a relay satellite tracking device according to an embodiment of the present invention.
Icon:
31-SSA link module; 32-a position module; 33-a parameter module; 34-a correction module; 35-Ka link module.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, two modes of tracking a target by an inter-satellite antenna of a relay satellite mainly comprise program tracking and self-tracking. Under a program tracking mode, a theoretical running track of a target user is injected into a relay satellite in advance, and an inter-satellite antenna of the relay satellite adjusts a frame angle according to the injected track information during task execution; in the self-tracking mode, a user target transmits data transmission or beacon signals returning to a Ka frequency band to a relay satellite, and an inter-satellite antenna servo system of the relay satellite automatically adjusts a frame angle according to received signals and a difference level. The former requires that the moving track of the user target is known, the track prediction accuracy is high enough, and the prediction timeliness is timely enough, and the latter requires that the power of the data transmission or beacon signal transmitted by the user target terminal is high enough and stable. The two modes can be used together in actual tasks, and program tracking is often used as an initial boot and backup means of self-tracking.
Although program tracking and self-tracking can well meet the tracking requirements of spacecraft targets, risks exist or even are unavailable for various non-spacecraft targets, especially for shipborne targets. First, the trajectory of a ship-borne target is random and tends to deviate from a predetermined trajectory, making it difficult to track using a program. Secondly, due to the complexity of environmental factors such as ocean currents and weather in the marine environment, the attitude of the ship-borne target has randomness, so that the relay terminal antenna can possibly shield the relay satellite path, and in addition, the Ka link is seriously influenced by rain attenuation, and the inter-satellite antenna of the relay satellite cannot ensure that data transmission or beacon signals with stable power transmitted by the ship-borne target are received, so that the self-tracking mode is difficult to use.
Based on the above, the relay satellite tracking method and the relay satellite tracking device provided by the embodiment of the invention can realize that the relay satellite supports a new shipborne target mode by utilizing the advantages of large coverage area of the S frequency band and high transmission rate of the Ka frequency band of the relay satellite system aiming at the problem that the shipborne target track can be changed in real time according to the task condition. The embodiment of the invention provides a relay satellite Ka inter-satellite antenna pointing control strategy based on real-time position information guidance, and an antenna tracking mode of guiding the Ka frequency band by an S frequency band is used, so that the problem of antenna pointing tracking caused by deviation of a preset track and an actual track of a ship platform is solved, and the flexibility of the ship platform is greatly improved.
For the convenience of understanding the present embodiment, a detailed description will be first given of a relay satellite tracking method disclosed in the present embodiment.
Example 1
An embodiment 1 of the present invention provides a relay satellite tracking method, which is described in a flowchart of a relay satellite tracking method shown in fig. 1, and includes the following steps:
step S102, an SSA link with the target terminal is established.
Before a task starts, relay satellite state setting is firstly carried out, wherein the relay satellite state setting comprises setting of a forward return SSA transponder center frequency, a satellite-ground frequency and a gain gear, and setting of a transponder working frequency, a satellite-ground frequency and a gain gear of a forward return Ka-band Single Address (KSA). When the relay satellite state is set, the data transmission task configuration of the ground station is carried out, and the forward return SSA link only uses a system channel and does not use terminal equipment of the ground station, so that only an intermediate frequency switch matrix and a radio frequency link need to be configured; the forward KSA link uses middle and low speed data transmission terminals, the return KSA link uses high speed data transmission terminals, and the default speed gear (forward data rate 10Mbps, return data rate 150Mbps) can be configured.
The target terminal may be a ship platform. And establishing an SSA link with the target terminal according to the preset position of the target terminal. The predetermined position may be obtained from a predetermined track file, and the predetermined track file is the operation track planning information of the target terminal predetermined by the user. The predetermined track file is stored in advance in a storage device of the relay satellite system ground station. The SSA link uses the S frequency band for communication, and has the advantage of large coverage.
And step S104, receiving the current position returned by the target terminal through the SSA link.
After the SSA link is established, the target terminal can automatically return the current position of the target terminal through the SSA link in real time.
And step S106, generating antenna correction parameters according to the current position and the preset position of the target terminal.
Since there may be a difference between the predetermined position in the predetermined trajectory and the actual position of the target terminal, after receiving the current position of the target terminal through the SSA link, a correction parameter is generated according to the difference between the current position and the predetermined position.
And step S108, transmitting the antenna correction parameters to the relay satellite so that the relay satellite performs antenna pointing correction.
The correction parameters include a correction instruction and a control script. After the relay satellite receives the correction parameters, the antenna pointing direction correction is carried out according to the correction parameters so that the antenna points to the current position of the target terminal, and therefore stable transmission of signals between the satellite and the target terminal is guaranteed.
The embodiment of the invention provides a relay satellite tracking method, which can receive the current position of a target terminal returned by the target terminal through an SSA link by utilizing the characteristic of large S-band coverage range of the relay satellite through establishing the SSA link with the target terminal, calculate a correction parameter between the current position and a preset position, and control the relay satellite to correct the antenna pointing direction through the correction parameter. The embodiment of the invention can acquire the actual position of the target terminal by establishing the SSA link, and finally enable the antenna to point to the actual position of the target terminal according to the deviation between the actual position and the preset position, thereby solving the problem of inaccurate pointing of the antenna and realizing the stable high-speed transmission of signals.
In order to ensure that the target terminal can stably return the current position, the step of establishing an SSA link with the target terminal includes:
(1) and sending a forward SSA link establishment signal to the target terminal.
Referring to the implementation flow diagram of the relay satellite tracking method shown in fig. 2, a ground station of a relay satellite system sends a forward SSA link establishment signal to a target terminal, and the target terminal is provided with an SSA signal receiving device for receiving the SSA link establishment signal.
(2) And receiving the network access application fed back by the target terminal according to the forward link establishment signal.
And the target terminal locks the signal after receiving the SSA link establishment signal and automatically sends a return link establishment signal to the relay satellite system, wherein the return link establishment signal comprises a network access application. And the ground station of the relay satellite system receives the network access application.
(3) And carrying out identity recognition on the target terminal according to the network access application, and establishing an SSA link according to an identity recognition result.
And judging whether the target terminal is a legal user or not according to the network access application, wherein the identity recognition result is that the user is legal or illegal, and if the identity recognition result is that the user is legal, establishing an SSA link with the target terminal. Referring to the implementation flow diagram of the relay satellite tracking method shown in fig. 2, the relay satellite system may receive the GPS position information, the rate step information, and the link state information sent by the target terminal through the SSA link.
In order to facilitate the fast establishment of the SSA link, before the step of establishing the SSA link with the target terminal, the method further includes: generating a control parameter according to a preset position of a target terminal; and sending the control parameters to the relay satellite so that the antenna of the relay satellite points to the preset position of the target terminal.
And calculating the control parameters of the planet ground large loop according to the preset position of the target terminal at the catching and tracking starting moment, starting the control script of the planet ground large loop after the control parameters of the planet ground large loop are calculated, and pointing the antenna to the preset position of a certain ship platform. The control parameters include antenna control commands including pitch angle, azimuthal step pulse data and pulse interval, azimuth and pitch direction pulse number per cycle. The satellite-ground control script can be operated in an OBC satellite-ground control mode, and an antenna control instruction needs to be injected into the controller. After the star-ground control script is run, the interplanetary antenna moves to a predetermined position pointing to the target terminal.
In order to ensure accurate pointing of the inter-satellite antenna Ka beam, the process of generating the antenna correction parameter needs to be optimized, and therefore, the step of generating the antenna correction parameter according to the current position and the preset position of the target terminal includes: calculating a difference between the current position and a predetermined position of the target terminal; and if the difference is larger than the preset threshold, generating an antenna correction parameter according to the difference.
The preset threshold may be Ka half-power beamwidth. And if the difference between the current position and the preset position of the target terminal is greater than the Ka half-power beam width, generating an antenna correction parameter according to the difference. The antenna correction parameters comprise antenna correction instructions, and the relay satellite system controls the motion of the antenna according to the antenna correction instructions so as to ensure the accurate pointing of the Ka wave beam between the satellite and the target terminal.
In order to ensure that the shipborne target signal can realize high-speed return, the method further comprises the following steps of sending the antenna correction parameter to the relay satellite so as to enable the relay satellite to perform antenna pointing correction: and controlling the relay satellite to establish a Ka link with the target terminal.
Referring to the implementation flow diagram of the relay satellite tracking method shown in fig. 2, after the link establishment of the S link is completed, link state information is received to prepare for Ka high-speed link establishment, and after the antenna control is in place, the Ka band link establishment is performed. After the Ka link is established, the target terminal and the relay satellite system communicate through the KSA signal, and the Ka frequency band has the advantage of high transmission rate and can ensure high-speed transmission of the signal.
The embodiment of the invention provides a closed-loop tracking method for a relay satellite inter-satellite antenna SSA (single satellite antenna) to guide KSA (KSA), which solves the problem that a flight path of a ship-borne target can be changed in real time in a task process by utilizing the advantages of a relay satellite system that the S frequency band coverage is large and the Ka frequency band transmission rate is high, and greatly improves the flexibility of a ship platform.
Example 2
An embodiment 1 of the present invention provides a relay satellite tracking device, which refers to a structural block diagram of a relay satellite tracking device shown in fig. 3, and includes:
an SSA link module 31, configured to establish an SSA link with a target terminal; a location module 32, configured to receive a current location returned by the target terminal through the SSA link; a parameter module 33, configured to generate an antenna correction parameter according to the current position and a predetermined position of the target terminal; and the correction module 34 is configured to send the antenna correction parameter to the relay satellite, so that the relay satellite performs antenna pointing correction.
The SSA link module is further configured to: sending a forward SSA link establishment signal to a target terminal; receiving a network access application fed back by a target terminal according to a forward link establishment signal; and carrying out identity recognition on the target terminal according to the network access application, and establishing an SSA link according to an identity recognition result.
The SSA link module is further configured to: generating a control parameter according to a preset position of a target terminal; and sending the control parameters to the relay satellite so that the antenna of the relay satellite points to the preset position of the target terminal.
A parameter module further to: calculating a difference between the current position and a predetermined position of the target terminal; and if the difference is larger than the preset threshold, generating an antenna correction parameter according to the difference.
Referring to fig. 4, another block diagram of the relay satellite tracking device is shown, the device further includes a Ka link module 35 for: and controlling the relay satellite to establish a Ka link with the target terminal.
The implementation principle and the generated technical effect of the relay satellite tracking device provided by the embodiment of the invention are the same as those of the relay satellite tracking method embodiment, and for brief description, the corresponding contents in the relay satellite tracking method embodiment can be referred to where the embodiment of the relay satellite tracking device is not mentioned.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A relay satellite tracking method, comprising:
establishing an SSA link with the target terminal according to the preset position of the target terminal;
receiving the current position returned by the target terminal through the SSA link;
generating an antenna correction parameter according to the current position and the preset position of the target terminal;
sending the antenna correction parameters to a relay satellite so that the relay satellite performs antenna pointing correction;
and controlling the relay satellite to establish a Ka link with the target terminal.
2. The method of claim 1, wherein the step of establishing the SSA link with the target terminal comprises:
sending a forward SSA link establishment signal to a target terminal;
receiving a network access application fed back by the target terminal according to the forward link establishment signal;
and identifying the identity of the target terminal according to the network access application, and establishing an SSA link according to an identity identification result.
3. The relay satellite tracking method according to claim 1, wherein the step of establishing the SSA link with the target terminal is preceded by the step of:
generating a control parameter according to the preset position of the target terminal;
and sending the control parameters to the relay satellite so that the antenna of the relay satellite points to the preset position of the target terminal.
4. The relay satellite tracking method according to claim 1, wherein the step of generating antenna correction parameters according to the current position and the predetermined position of the target terminal comprises:
calculating a difference between the current position and a predetermined position of the target terminal;
and if the difference is larger than a preset threshold value, generating the antenna correction parameter according to the difference.
5. A relay satellite tracking device, comprising:
the SSA link module is used for establishing an SSA link with the target terminal according to the preset position of the target terminal;
the position module is used for receiving the current position returned by the target terminal through the SSA link;
the parameter module is used for generating antenna correction parameters according to the current position and the preset position of the target terminal;
the correction module is used for sending the antenna correction parameters to a relay satellite so as to enable the relay satellite to perform antenna pointing correction;
and the Ka link module is used for controlling the relay satellite to establish a Ka link with the target terminal.
6. The relay satellite tracking device of claim 5, wherein the SSA link module is further configured to:
sending a forward SSA link establishment signal to a target terminal;
receiving a network access application fed back by the target terminal according to the forward link establishment signal;
and identifying the identity of the target terminal according to the network access application, and establishing an SSA link according to an identity identification result.
7. The relay satellite tracking device of claim 5, wherein the SSA link module is further configured to:
generating a control parameter according to the preset position of the target terminal;
and sending the control parameters to the relay satellite so that the antenna of the relay satellite points to the preset position of the target terminal.
8. The relay satellite tracking device of claim 5, wherein the parameter module is further configured to:
calculating a difference between the current position and a predetermined position of the target terminal;
and if the difference is larger than a preset threshold value, generating the antenna correction parameter according to the difference.
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