Manual target for measuring downward atmospheric long-wave radiation and method for producing same

Abstract

The invention provides a manual target for measuring downward atmospheric long-wave radiation and a method for producing the same. The manual target comprises a target body, a temperature-measuring system, and a master control system. The temperature-measuring system is connected with the target body and measures the temperature of the target body. The master control system is connected with the temperature-measuring system and displays and stores measured temperature data. The target body is N-row M-column target array formed by seamlessly splicing N*M child targets. The manual target is convenient to transport. Inconvenience of transporting the manual targets at a large scale is avoided. The manual target increases the measurement precision of downward atmospheric long-wave radiation values, decreases measurement errors, is greatly reduced in cost, satisfies ground close-quarter measurement, and is suitable for infrared load calibration on aerial work platforms, airborne platforms, and balloon platforms.

Description

technical field [0001] The invention relates to the technical field of remote sensing, in particular to an artificial target for atmospheric downlink long-wave radiation measurement and a manufacturing method thereof. Background technique [0002] The thermal infrared (8-14 μm) radiation received by satellite sensors mainly comes from the surface's own radiation, atmospheric upgoing long-wave radiation, and atmospheric downgoing long-wave radiation. Atmospheric transmittance, atmospheric up-going and down-going long-wave radiation together constitute the influence of the atmosphere on thermal infrared remote sensing. Atmospheric downgoing long-wave radiation refers to the part of the atmosphere's own radiation and scattered long-wave radiation reaching the ground downward. In the field of quantitative thermal infrared remote sensing, atmospheric downgoing long-wave radiation is one of the key factors in the retrieval of surface temperature and emissivity. In addition, as o...

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Problems solved by technology

[0004] Among the above-mentioned atmospheric downgoing long-wave radiation acquisition methods, the first method has the problem that the sounding balloon will deviate from the destination due to the influence of the wind during its ascent, and it usually takes about 1 hour for the sounding balloon to detect the entire atmosphere, while the satellite / aircraft Earth observation is instantaneous, and it is difficult to meet the synchronization requirements; the main defect of method 2 and method 3 is that the empirical statistical relationship and the inversion method have large errors, and it is difficult to meet the quantitative application requirements of thermal infrared remote sensing; method 4 can Instantaneously obtain high-precision atmospheric downgoing long-wave radiation, but as we all know, the diffuse reflection gold plate used in the current test process is small in size (~10cm) and very expensive, which can only meet the short-distance (~1m) measurement on the ground

With the rapid development of my country's earth observation technology, the requirements for alternative calibration of aviation and aerospace remote sensing load sites are getting higher and higher. In the past, the diffuse reflection gold plate with a small area cannot meet the application needs.

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