Interference time delay observed quantity acquisition method and system applied to small-bandwidth signal
By designing the signal band widening factor and corrected delay model, the problem of low interference delay measurement accuracy of spacecraft with small bandwidth signals is solved, and high-precision interference delay calculation is achieved.
Patent Information
- Application Number
- CN202510662888.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, for spacecraft that does not have dedicated radio beacons and only transmits small bandwidth signals, the interference delay measurement accuracy obtained by traditional methods is low.
The signal band broadening factor of the target spacecraft is designed, a delay model based on the baseline is constructed, and the delay model is corrected through the signal band broadening factor and the sub-integrated mutual power spectrum to calculate the interference delay.
It has achieved the improvement of interference delay measurement accuracy for spacecraft that do not have dedicated radio beacons, and has high application value.
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Figure CN120491189A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of deep space exploration technology, and in particular to a method and system for acquiring interferometric time delay observation quantities applied to small-bandwidth signals. Background Art
[0002] Very Long Baseline Interferometry (VLBI) is a technical means to obtain high-precision angular position information of the detector, supporting the determination of the detector's orbit.
[0003] In traditional methods, the accuracy of delay measurements is directly related to the signal bandwidth. Theoretical analysis shows that larger signal bandwidths result in higher delay accuracy, while smaller signal bandwidths result in lower delay accuracy. Therefore, interferometric measurements of spacecraft targets typically utilize dedicated beacon signals to obtain effective measurements, while minimizing the use of low-bandwidth signals such as carrier waves and telemetry. Consequently, for spacecraft without dedicated radio beacons or emitting only low-bandwidth signals, the accuracy of interferometric delay measurements obtained using traditional methods is low. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to address the deficiencies of the existing technology and specifically provide a method and system for obtaining interferometric delay observations for small bandwidth signals, as follows:
[0005] 1) In the first aspect, the present invention provides a method for obtaining interferometric delay observations for small-bandwidth signals. The specific technical solution is as follows:
[0006] Designing a signal bandwidth broadening factor corresponding to a transmission signal of a target spacecraft, wherein the target spacecraft is a spacecraft that transmits only a small-bandwidth signal;
[0007] Build a baseline-based latency model;
[0008] Based on the signal bandwidth broadening factor, the baseline-based delay model is modified to obtain a target delay model;
[0009] The interference delay of the target spacecraft is calculated according to the target delay model.
[0010] The beneficial effects of the interferometric delay observation method for obtaining small bandwidth signals provided by the present invention are as follows:
[0011] The present invention can determine the interference delay of a spacecraft that does not have a dedicated radio beacon and only transmits a small-bandwidth signal, and has high application value.
[0012] On the basis of the above solution, the method for obtaining interference delay observation quantity applied to small bandwidth signals of the present invention can be further improved as follows.
[0013] Furthermore, it also includes:
[0014] Obtain a sub-integrated cross-power spectrum between a master station and a slave station of the target spacecraft.
[0015] Furthermore, based on the signal bandwidth broadening factor, the baseline-based delay model is modified to obtain a target delay model, including:
[0016] Based on the signal bandwidth expansion factor and the sub-integrated cross-power spectrum, the baseline-based delay model is modified to obtain a target delay model.
[0017] Furthermore, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed, including:
[0018] According to the nominal frequency characteristics of the target spacecraft's transmission signal and the time delay model of the target spacecraft relative to the master station, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed.
[0019] 2) In a second aspect, the present invention further provides an interferometric delay observation acquisition system for small-bandwidth signals, the specific technical solution of which is as follows:
[0020] It includes design module, time delay model building module, correction module and interference delay acquisition module;
[0021] The design module is used to design a signal bandwidth broadening factor corresponding to a transmission signal of a target spacecraft, wherein the target spacecraft is a spacecraft that only transmits a small bandwidth signal;
[0022] The delay model building module is used to: build a delay model based on the baseline;
[0023] The correction module is used to: correct the baseline-based delay model based on the signal bandwidth broadening factor to obtain a target delay model;
[0024] The interference delay acquisition module is used to calculate the interference delay of the target spacecraft according to the target delay model.
[0025] On the basis of the above solution, the interferometric time delay observation quantity acquisition system for small bandwidth signals of the present invention can be further improved as follows.
[0026] Furthermore, it also includes a sub-integrated mutual power spectrum acquisition module, which is used to: acquire the sub-integrated mutual power spectrum between the master station and the slave station of the target spacecraft.
[0027] Furthermore, the correction module is specifically configured to correct the baseline-based delay model based on the signal bandwidth broadening factor and the sub-integrated cross-power spectrum to obtain a target delay model.
[0028] Furthermore, the design module is specifically used to:
[0029] According to the nominal frequency characteristics of the target spacecraft's transmission signal and the time delay model of the target spacecraft relative to the master station, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed.
[0030] 3) In a third aspect, the present invention also provides an electronic device, comprising a processor coupled to a memory, wherein the memory stores at least one computer program, and the at least one computer program is loaded and executed by the processor so that the electronic device implements any of the above-mentioned methods for obtaining interference delay observation quantities for small-bandwidth signals.
[0031] 4) In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the above-mentioned methods for obtaining interference delay observation quantities for small-bandwidth signals.
[0032] It should be noted that the beneficial effects achieved by the technical solutions of the second to fourth aspects of the present invention and the corresponding possible implementation methods can be found in the above-mentioned technical effects of the first aspect and its corresponding possible implementation methods, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments of the present invention:
[0034] Figure 1 Schematic diagram of a flow chart of a method for obtaining interferometric delay observations applied to small-bandwidth signals according to an embodiment of the present invention;
[0035] Figure 2 is a data diagram of the spectrum characteristics of the transmitted signal;
[0036] Figure 3 Schematic diagram of the obtained cross-power spectrum and interference fringes data;
[0037] Figure 4 Schematic diagram of the cross power spectrum data obtained using the method of the present invention;
[0038] Figure 5 Schematic diagram of the data of the time-delay observation quantity obtained by the method of the present invention;
[0039] Figure 6Schematic diagram of the structure of a system for acquiring interferometric time delay observations applied to small-bandwidth signals according to an embodiment of the present invention;
[0040] Figure 7 The figure is a schematic structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION
[0041] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0042] The following describes in detail the technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems using specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following embodiments of the present invention are described in conjunction with the accompanying drawings.
[0043] like Figure 1 As shown, a method for obtaining an interferometric delay observation quantity applied to a small bandwidth signal according to an embodiment of the present invention includes the following steps:
[0044] S1. Design a signal bandwidth broadening factor corresponding to the transmission signal of the target spacecraft, wherein the target spacecraft is a spacecraft that only transmits a small bandwidth signal;
[0045] S2, build a delay model based on the baseline;
[0046] S3. Based on the signal bandwidth broadening factor, modify the baseline-based delay model to obtain a target delay model;
[0047] S4. Calculate the interference delay of the target spacecraft according to the target delay model.
[0048] Optionally, in the above technical solution, it also includes: obtaining a sub-integrated mutual power spectrum between the master station and the slave station of the target spacecraft.
[0049] Optionally, in the above technical solution, in S3, based on the signal bandwidth broadening factor, the baseline-based delay model is corrected to obtain the target delay model, including:
[0050] Based on the signal bandwidth broadening factor and the sub-integrated cross-power spectrum, the baseline-based delay model is modified to obtain the target delay model.
[0051] Optionally, in S1, the signal bandwidth broadening factor corresponding to the transmission signal of the target spacecraft is designed, including:
[0052] According to the nominal frequency characteristics of the target spacecraft's transmission signal and the time delay model of the target spacecraft relative to the master station, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed.
[0053] The present invention is described by the following examples, which specifically include the following steps:
[0054] S101. Design a signal bandwidth broadening factor corresponding to the target spacecraft's transmitted signal based on the nominal frequency characteristics of the target spacecraft's transmitted signal and the target spacecraft's time delay model relative to the master station. The target spacecraft is a spacecraft that only transmits small-bandwidth signals, that is, the target spacecraft's transmitted signal is a small-bandwidth signal.
[0055] The nominal frequency characteristics of the target spacecraft's transmission signal are expressed by the following formula:
[0056] [f0,f0+B]
[0057] Where f0 represents the nominal starting frequency of the transmitted signal, in Hz; B represents the nominal bandwidth of the transmitted signal, in Hz.
[0058] Among them, the signal bandwidth broadening factor K corresponding to the target spacecraft's transmission signal is: f0 represents the nominal starting frequency of the transmitted signal, in Hz; B represents the nominal bandwidth of the transmitted signal, in Hz; the product of B and K is the expected effective interference fringe bandwidth, in Hz; T is the integration period, in seconds; and C2 is the quadratic coefficient of the time delay model of the target spacecraft relative to the master station.
[0059] S102: Build a baseline-based latency model, specifically including S1020 to S1021:
[0060] S1020. Obtain the geocentric time delay model τ of the master station A (t) and the geocentric time delay model τ of the slave station B (t):
[0061] τ A (t) = polyval(P A ,t)
[0062] τ B (t) = polyval(P B ,t)
[0063] Among them, the master station and the slave station represent the two stations for interferometric measurement, where the reference station is the master station and the other is the slave station; t is the time variable, P A The polynomial coefficients of the geocentric delay model of the master station, P BRepresents the polynomial coefficients of the geocentric delay model of the slave station, and polyval() represents polynomial calculation.
[0064] S1021, according to the geocentric time delay model τ of the master station A (t) and the geocentric time delay model τ of the slave station B (t), and obtain the baseline delay model τ(t):
[0065] τ(t)=polyval(polyfit(t+τ A (t),τ B (t)-τ A (t)),t)
[0066] Among them, polyfit() represents the least squares fitting calculation, t is the time variable, and polyval() represents the polynomial calculation.
[0067] S103, applying the traditional correlation processing method to obtain the sub-integrated cross-power spectrum between the master station and the slave station, denoted as Where N represents the number of sub-integrated power spectra, Represents the i-th sub-integrated power spectrum, M represents the number of data points of each integrated power spectrum, and m represents the index.
[0068] S104 : Based on the signal bandwidth broadening factor and the sub-integrated cross-power spectrum, modify the baseline-based delay model to obtain a target delay model.
[0069] The target delay model is: τ N (t) = τ(t) + ∫Ldt, ∫Ldt represents the integration of L, Φ is the signal mean phase sequence, f is the signal phase, diff() represents the difference, and T is the sub-integrated cross-power spectrum time series.
[0070] S105. Calculate the interference delay according to the target delay model. Specifically:
[0071] According to the target delay model, the interference delay τ is calculated N (t).
[0072] The technical effects of the present invention are verified through the following verification experiments:
[0073] Verification was performed using simulation data, where the downlink signal frequency band is X-Burton, and the effective signal bandwidth is only 8KHz, which is more than three orders of magnitude smaller than the dedicated beacon bandwidth. Figure 2 The nominal signal of the target downlink is shown.
[0074] After processing by the present invention, the time delay model comparison is corrected based on the sub-integrated power spectrum, such as Figure 3 and Figure 4The cross power spectrum and time delay observations obtained by the method of the present invention are shown as follows: Figure 4 and Figure 5 shown.
[0075] In the above embodiments, although the steps are numbered S1, S2, etc., these are only specific embodiments given by the present invention. Those skilled in the art may adjust the execution order of S1, S2, etc. according to actual conditions, which is also within the scope of protection of the present invention. It can be understood that in some embodiments, some or all of the above embodiments may be included.
[0076] like Figure 6 As shown, an interferometric delay observation acquisition system 200 for small bandwidth signals according to an embodiment of the present invention includes a design module 201, a delay model construction module 202, a correction module 203 and an interferometric delay acquisition module 204;
[0077] The design module 201 is used to design a signal bandwidth broadening factor corresponding to a transmission signal of a target spacecraft, wherein the target spacecraft is a spacecraft that only transmits a small bandwidth signal;
[0078] The delay model building module 202 is used to: build a delay model based on the baseline;
[0079] The correction module 203 is used to correct the delay model based on the baseline based on the signal bandwidth widening factor to obtain a target delay model;
[0080] The interference delay acquisition module 204 is used to calculate the interference delay of the target spacecraft according to the target delay model.
[0081] Optionally, in the above technical solution, a sub-integrated mutual power spectrum acquisition module is further included, and the sub-integrated mutual power spectrum acquisition module is used to: acquire the sub-integrated mutual power spectrum between the master station and the slave station of the target spacecraft;
[0082] Optionally, in the above technical solution, the correction module 203 is specifically configured to correct the baseline-based delay model based on the signal bandwidth broadening factor and the sub-integrated cross-power spectrum to obtain a target delay model.
[0083] Optionally, in the above technical solution, the design module 201 is specifically used to:
[0084] According to the nominal frequency characteristics of the target spacecraft's transmission signal and the time delay model of the target spacecraft relative to the master station, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed.
[0085] It should be noted that the beneficial effects of the interferometric time delay observation quantity acquisition system 200 applied to small bandwidth signals provided in the above embodiment are the same as the beneficial effects of the above method for acquiring interferometric time delay observation quantities applied to small bandwidth signals, and will not be repeated here. In addition, when implementing its functions, the system provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the system can be divided into different functional modules according to actual conditions to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.
[0086] Among them, the interferometric time delay observation quantity acquisition system applied to small bandwidth signals of the present invention can be a computer program (including program code) running in a computer device. For example, the interferometric time delay observation quantity acquisition system applied to small bandwidth signals of the present invention is an application software that can be used to execute the corresponding steps of the interferometric time delay observation quantity acquisition method applied to small bandwidth signals of the present invention.
[0087] In some embodiments, the interference time delay observation quantity acquisition system for small bandwidth signals of the present invention can be implemented by a combination of software and hardware. As an example, the interference time delay observation quantity acquisition system for small bandwidth signals of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the interference time delay observation quantity acquisition method for small bandwidth signals of the present invention. For example, the processor in the form of a hardware decoding processor can adopt one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field programmable gate arrays (FPGAs), or other electronic components.
[0088] The modules described in the embodiments of the present invention may be implemented in software or hardware, and the name of a module does not necessarily limit the module itself.
[0089] An electronic device according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, any one of the aforementioned methods for obtaining an interference time delay observation quantity applied to a small-bandwidth signal is implemented. That is, an electronic device according to an embodiment of the present invention may include, but is not limited to, a processor and a memory; the memory is used to store the computer program; and the processor is used to execute, by calling the computer program, the method for obtaining an interference time delay observation quantity applied to a small-bandwidth signal as shown in any one of the embodiments of the present invention.
[0090] In an alternative embodiment, an electronic device is provided, such as Figure 7 As shown, Figure 7 The electronic device 4000 shown includes: a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, for example, via a bus 4002. Optionally, the electronic device 4000 may further include a transceiver 4004, which can be used for data exchange between the electronic device and other electronic devices, such as data transmission and / or data reception. It should be noted that in actual applications, the number of transceivers 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present invention.
[0091] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. Processor 4001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
[0092] Bus 4002 may include a path for transmitting information between the above components. Bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. Bus 4002 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7In the figure, only one thick line is used to represent the bus 4002, but this does not mean that there is only one bus or one type of bus.
[0093] The memory 4003 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.
[0094] The memory 4003 is used to store application code (computer program) for executing the solution of the present invention, and is controlled by the processor 4001. The processor 4001 is used to execute the application code stored in the memory 4003 to implement the content shown in the above method embodiment.
[0095] Among them, the electronic device can also be a terminal device, and the terminal device can be any device that can install applications, including at least one of a smartphone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, a smart TV, and a smart car device.
[0096] It should be noted that Figure 7 The electronic device shown is only an example and should not limit the functions and scope of use of the embodiments of the present invention.
[0097] A computer-readable storage medium according to an embodiment of the present invention stores a computer program, which, when executed by a processor, implements any of the above-mentioned methods for obtaining interferometric delay observation quantities for small-bandwidth signals.
[0098] Alternatively, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, or the like.
[0099] In an exemplary embodiment, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform any of the aforementioned methods for obtaining interferometric delay observations for narrow-bandwidth signals.
[0100] Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).
[0101] It should be understood that the flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the methods and computer program products according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or can be implemented using a combination of dedicated hardware and computer instructions.
[0102] The computer-readable storage medium provided in the embodiment of the present invention may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EEPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or component.
[0103] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device executes the method shown in the above embodiment.
[0104] The above description is merely a preferred embodiment of the present invention and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in the present invention is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also includes other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned disclosed concepts. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in the present invention.
[0105] It should be noted that the terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects and to define a specific order or precedence. Where appropriate, the order used for similar objects may be interchanged, such that the embodiments of the present application described herein can be implemented in an order other than the order shown or described.
[0106] Those skilled in the art will appreciate that the present invention may be implemented as a system, method, or computer program product. Therefore, the present invention may be implemented in the following forms: entirely in hardware, entirely in software (including firmware, resident software, microcode, etc.), or in a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, the present invention may be implemented in the form of a computer program product embodied in one or more computer-readable media containing computer-readable program code.
[0107] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A method for obtaining interferometric delay observations for small bandwidth signals, characterized in that: include: Designing a signal bandwidth broadening factor corresponding to a transmission signal of a target spacecraft, wherein the target spacecraft is a spacecraft that transmits only a small-bandwidth signal; Build a baseline-based latency model; Based on the signal bandwidth broadening factor, the baseline-based delay model is modified to obtain a target delay model; The interference delay of the target spacecraft is calculated according to the target delay model.
2. The method for obtaining interferometric delay observations for small bandwidth signals according to claim 1, wherein: Also includes: Obtain a sub-integrated cross-power spectrum between a master station and a slave station of the target spacecraft.
3. The method for obtaining interferometric delay observations for small bandwidth signals according to claim 2, wherein: Based on the signal bandwidth broadening factor, the baseline-based delay model is modified to obtain a target delay model, including: Based on the signal bandwidth expansion factor and the sub-integrated cross-power spectrum, the baseline-based delay model is modified to obtain a target delay model.
4. The method for obtaining interferometric delay observations for small bandwidth signals according to any one of claims 1 to 3, characterized in that: Design the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal, including: According to the nominal frequency characteristics of the target spacecraft's transmission signal and the time delay model of the target spacecraft relative to the master station, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed.
5. A system for acquiring interferometric time delay observations for small bandwidth signals, characterized in that: It includes design module, time delay model building module, correction module and interference delay acquisition module; The design module is used to design a signal bandwidth broadening factor corresponding to a transmission signal of a target spacecraft, wherein the target spacecraft is a spacecraft that only transmits a small bandwidth signal; The delay model building module is used to: build a delay model based on the baseline; The correction module is used to: correct the baseline-based delay model based on the signal bandwidth broadening factor to obtain a target delay model; The interference delay acquisition module is used to calculate the interference delay of the target spacecraft according to the target delay model.
6. The interferometric delay observation acquisition system for small bandwidth signals according to claim 5, characterized in that: It also includes a sub-integrated mutual power spectrum acquisition module, which is used to obtain the sub-integrated mutual power spectrum between the master station and the slave station of the target spacecraft.
7. The interferometric delay observation acquisition system for small bandwidth signals according to claim 6, characterized in that: The correction module is specifically configured to correct the baseline-based delay model based on the signal bandwidth broadening factor and the sub-integrated cross-power spectrum to obtain a target delay model.
8. The interferometric delay observation acquisition system for small bandwidth signals according to any one of claims 5 to 7, characterized in that: The design module is specifically used for: According to the nominal frequency characteristics of the target spacecraft's transmission signal and the time delay model of the target spacecraft relative to the master station, the signal bandwidth broadening factor corresponding to the target spacecraft's transmission signal is designed.
9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for obtaining an interferometric time delay observation quantity applied to a small bandwidth signal as described in any one of claims 1 to 4 is implemented.
10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for obtaining an interference delay observation quantity applied to a small bandwidth signal according to any one of claims 1 to 4 is implemented.