GNSS occultation detection signal processing method

Abstract

The invention discloses a GNSS occultation detection signal processing method. The GNSS occultation detection signal processing method comprises the following steps: S1, receiving signals of a plurality of antennas; S2, respectively performing radio frequency processing on the antenna signals to change the antenna signals into digital signals; S3, respectively carrying out baseband processing on the digital signals to form baseband data; S4, preprocessing the baseband data, and removing invalid data; S5, respectively encoding the data to form measurement data; and S6, carrying out time sequence processing on the measurement data, and synthesizing the multiple pieces of measurement data under the same time sequence into one piece of data. According to the invention, the radio frequency processing, baseband processing and encoding processes of the signals are carried out separately, so that the coupling between the signals is reduced, and the reliability of signal processing is improved;invalid data is eliminated through preprocessing before encoding, so that the data processing burden is reduced, and the processing efficiency is improved; integration of multiple paths of differentsignals is completed through time sequence processing, data is judged and processed in a multiple mode, and the continuity of measurement data and the measurement precision are improved.

Description

technical field [0001] The invention belongs to the technical field of space detection, in particular to a GNSS occultation detection signal processing method. Background technique [0002] In recent years, GNSS has developed rapidly in countries all over the world. Among them, the aerospace industry has entered the process of commercialization in many fields, and the application of GNSS remote sensing technology has made breakthrough progress. GNSS remote sensing technology uses radio waves to propagate in the earth's atmosphere, or changes in signal amplitude, phase and other physical quantities after being reflected by ground objects, to invert meteorological elements such as the earth's atmosphere, ocean and soil. The retrieval products of GNSS occultation detection are ionosphere and atmospheric parameters. Ionospheric inversion products include ionospheric electron density profile and ionospheric scintillation index. Atmospheric inversion products include atmospheric ...

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Problems solved by technology

In the cosmic environment, due to the influence of the on-orbit single particle overturning and other reasons, the data will be abnormal and affect the accuracy of the detection results

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