Data acquisition unit for satellite-borne microwave radiometer and data acquisition method thereof

Abstract

The invention provides a data acquisition unit for a satellite-borne microwave radiometer and a data acquisition method thereof. The data acquisition unit comprises a control circuit part and a data acquisition circuit part, wherein the control circuit part controls a data acquisition circuit to acquire various scientific data according to ground control commands received by a timing sequence or a satellite set by a system; the data acquisition circuit part comprises two sets of data acquisition circuits which can be backed up with each other, and each set of data acquisition circuits comprises an isolation drive circuit, one or more than one muti-channel analog switch and an A/D (Analog to Digital) converter; and the data acquisition circuit part acquires the remote sensing data and the temperature data of the radiometer according to commands sent out by the control circuit. The invention not only avoids the disadvantage of lower reliability caused by single-channel acquisition but also can not make the weight, the volume and the power consumption of the system greatly increased by adopting the design that double sets of data acquisition channels can be backed up with each other. The data acquisition unit is a perfect combination of the advantages of two universal data acquisition units.

Description

technical field [0001] The invention relates to a data acquisition system, in particular to a data acquisition device and a data acquisition method for a spaceborne microwave radiometer. Background technique [0002] The space-borne microwave radiometer is a passive microwave remote sensor, which is used for all-day and all-weather observation of global atmospheric temperature and humidity, water vapor content, rainfall and other space weather data, as well as ocean surface temperature, ocean wind field, and soil humidity. It plays an important role in atmospheric detection and ocean observation. Since the microwave radiometer is a passive remote sensor, its sensitivity is very high; at the same time, as a spaceborne system, its volume, weight and power consumption are greatly limited, so the data acquisition of the spaceborne microwave radiometer The device is required to have the characteristics of high reliability, high resolution, small size, light weight, and low power...

AI Technical Summary

Problems solved by technology

Image 6 Shown is the structural diagram of this data acquisition device with multi-channel redundant design. Taking a 5-channel system as an example, each channel is equipped with a different A / D converter. Since each channel is self-contained, Independent of each other, so the failure of a single device will not affect other channels and will not cause the consequences of the failure of the entire system; but the problem brought by the multi-redundant design is that the circuit complexity increases and the number of devices doubles, which makes the system volume, Significantly increased weight and power consumption

Images