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A Method of Spectral Position Correction for Infrared Hyperspectral Data of Meteorological Satellites

A technology of meteorological satellites and correction methods, which is applied in the field of hyperspectral data, can solve problems such as huge computing loads, and achieve the effect of meeting real-time application requirements

Active Publication Date: 2022-04-19
郭强
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Problems solved by technology

For hyperspectral detectors of polar-orbiting meteorological satellites with 4 or 9 detectors, the calculation amount required for correction processing is acceptable; but for similar remote sensors like GIIRS working in geostationary orbit, due to its The number of probes will reach 10 2 -10 3 magnitude, such a huge amount of computation is unacceptable

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  • A Method of Spectral Position Correction for Infrared Hyperspectral Data of Meteorological Satellites
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  • A Method of Spectral Position Correction for Infrared Hyperspectral Data of Meteorological Satellites

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[0033] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments, and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the associated listed items.

[0034]The present invention starts from the physical principle of spectral resampling, utilizes the frequency-domain sampling and time-domain restoration characteristics of discrete Fourier transform, and realizes spectral deviation correction by adjusting the numbe...

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Abstract

The invention discloses a method for correcting spectral positions of meteorological satellite infrared hyperspectral data, which comprises the following steps: pre-correction processing, which is to construct a new spectral data sequence A available for correction according to the input spectral deviation to be corrected, with a length of N s ; Spectral position correction, for the array A, using a newly designed Fast Discrete Fourier Transform (FDFT) method, using a pair of FDFTs to obtain the complex array A' corrected by the spectral position; phase difference adjustment, correcting A' by Small phase changes caused by spectral position correction; adopting the technical scheme of the present invention, the corrected long-wave and mid-wave infrared spectral position accuracy is better than 10ppm, compared with the results of reference instruments or numerical weather forecast fields, it is not absolute position accuracy, and has obtained international Recognized by authoritative organizations, it meets the application of numerical weather prediction, and the timeliness of processing meets the requirements of real-time applications.

Description

technical field [0001] The invention relates to the field of hyperspectral data, in particular to a method for correcting spectral positions of meteorological satellite infrared hyperspectral data. Background technique [0002] Space-borne infrared atmospheric remote sensing with high spectral resolution provides unprecedented observation methods for modern numerical weather prediction, atmospheric environment monitoring, and climate change research. The interferometric atmospheric vertical sounder based on Fourier transform (or Michelson interferometric) spectroscopy technology is the main development direction of the current international three-dimensional vertical atmospheric detection. At present, there are 6 Michelson interferometers in the infrared band in orbit around the world, 2 in the United States and 2 in Europe, both mounted on polar-orbiting weather satellites; 2 in China, and 1 in polar-orbiting and geostationary weather satellites. Among them, the GIIRS (Geo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/02G01J3/45
CPCG01J3/0297G01J3/0275G01J3/45Y02A90/10
Inventor 郭强王新
Owner 郭强
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