Landing Index Evaluation Method of Extraterrestrial Object Soft Landing Detector under the Condition of Low Sampling Frequency

Abstract

The present invention is a landing index evaluation method for an extraterrestrial celestial body soft landing detector under the condition of low sampling frequency. Calculation; (2) The local extracelestial body soft landing detector meets the landing conditions, and the landing index described in step (1) is stored at a certain frequency and a certain number of cycles; (3) The ground confirms that the soft landing detector has safely soft landed outside the ground After the celestial body, download the landing index data stored by the soft landing detector; (4) The ground analyzes and evaluates the downloaded landing index data, if the landing index meets the soft landing task index issued by the detector as a whole Requirements, the landing index is judged to be qualified; otherwise, the landing index is judged to be unqualified, realizing the acquisition of the landing state on the planet at the moment of landing, and providing a reliable technical means for the final landing state determination and landing performance evaluation.

Description

technical field [0001] The invention relates to a landing index evaluation method under the condition of low sampling frequency of an extraterrestrial celestial body soft landing detector, which is suitable for the landing index evaluation in the soft landing process of extraterrestrial celestial bodies such as the moon, Mars, and asteroids, and belongs to the field of spacecraft design. Background technique [0002] Because extraterrestrial celestial bodies are far away from the earth, the configuration resources of ground deep space stations are insufficient, and at the same time, they are limited by the level of telemetry bandwidth. The telemetry downlink adopts the frame division and frequency division downlink strategy. Therefore, for extraterrestrial celestial body soft landing probes, there are problems such as long delay in telemetry data downloading, low data sampling frequency, and related telemetry in different telemetry frames. For the landing transient telemetry ...

AI Technical Summary

Problems solved by technology

At the same time, landing on the back of the moon also brought new problems. Since the back of the moon always faces away from the earth and is blocked by the moon body, the ground station cannot communicate directly with the probe. The rate is low (telemetry cycle takes 24s), and on-orbit telemetry is scarce; on the other hand, due to the limitation of the telemetry system, the telemetry time on the satellite cannot be aligned, that is, different telemetry frames are placed in different telemetry frames, resulting in inability to correlate key telemetry analyze

These factors make it impossible for the ground to fully analyze the momentary state of the probe's landing through telemetry data.

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