The exernal differential positioning system passde the acceptance of an aerospace instinture
On December 22, 2023, the external differential positioning system developed by our company passed the product acceptance organized by a certain aerospace institute. During the acceptance test, the real-time differential positioning accuracy of the external differential positioning system was 2.1m, and the post-differential positioning accuracy was 8.5mm.
system composition
The external differential positioning system is a high-precision positioning system for a certain test base of the army. The system consists of a base station, base station antenna, real-time differential software and post-differential software.
The base station is installed on the rack of the ground measurement and control station. It can receive signals from satellite systems such as GPS, Beidou, GLONASS, etc., output positioning information and original observation information such as pseudorange, carrier phase, signal-to-noise ratio, etc., and store the information in the data recorder in the base station. After the experiment, the data is downloaded for subsequent differential positioning.
In order to ensure the accuracy of the observations of the differential base station, the satellite receiving antenna uses a choke antenna, which is installed on a matching tripod. When in use, ensure that there are no obstructions around the antenna.
In the field test at the test base, a satellite navigation receiver is installed on the flying target. The positioning data and raw observation data of the satellite navigation receiver are transmitted to the telemetry receiving equipment of the ground measurement and control station through the telemetry link. The ground telemetry receiving equipment extracts the data and sends it to the computer.
The external measurement real-time differential software is run on the computer. The software can simultaneously read the positioning and original observation data of the flight target and the base station, complete data analysis, data storage, real-time differential analysis, etc., and transmit the processed positioning and speed measurement results to the center through the network port;
After the flight test, the external measurement real-time differential software reads the positioning and observation data of the base station and the flight target from the computer hard disk or from the base station recorder and completes the post-differential analysis to obtain high-precision position information of the flight target.
system feature
The system is supplied to a certain aerospace institute and is used by the military, which has very high requirements on the reliability and stability of the product.High reliability and stability
The differential reference station equipment developed by the company is a mature off-the-shelf product and has been used in the external test systems of multiple test bases. The stability and reliability of the equipment have been verified by many years of practical application.
Choke ring antenna for base station
The base station antenna adopts a high-precision choke antenna compatible with multiple satellite systems. The antenna phase center is stable and has strong anti-interference ability. The pre-filter can effectively suppress strong interference signals out of the band. It has lightning protection, waterproof and dustproof design.
External test differential software completes independent intellectual property rights
The external test differential software is completely independently developed and designed by the company, and can be customized according to the user's requirements for software processes, interface operations, differential positioning parameters, differential data processing, etc. During the development process, the company's software engineers coordinated and communicated with the overall units and users many times to determine the overall design framework and process of the software.
system parameters
1. Differential analysis supports GPS dual-frequency and Beidou dual-frequency;
2Real-time differential positioning data update rate: support 20Hz;
3. Real-time differential positioning accuracy: 2m (PDOP≤4, 1σ, baseline less than 50km);
4. Post-differential positioning accuracy: (PDOP≤4, 1σ, baseline less than 50km):
-Post-pseudo-range differential positioning accuracy: 2m
- Post-event carrier phase positioning accuracy: 5cm
conclusion
The company is able to customize products according to the application environment of the user unit, especially in missile-borne, airborne and other application fields, and develop products in a targeted manner according to special conditions such as installation conditions, electromagnetic environment, and structural layout. Satellite navigation and positioning products based on Beidou, GPS, GLONASS, and Galileo satellite systems are one of the company's product lines. The company's satellite navigation and positioning products include aircraft-borne/missile-borne high-dynamic satellite receivers, high-precision differential positioning systems, high-precision attitude and direction measurement systems, anti-interference antennas, timing equipment, etc. The
company's main customers are industrial sectors such as aerospace, China Electronics, China Shipbuilding, and weapons. In recent years, the company has designed its products for the civilian market at a low cost, reducing costs as much as possible while ensuring product performance and reliability, and providing customers with higher quality and more cost-effective products and services.
Welcome to visit the company's website www.zkzw.cc [1] to view the company's main product introduction.