Acquisition method of sea ice density based on scanning microwave radiometer of Haiyang-2 satellite

Abstract

The invention relates to the technical field of satellite communication and particularly relates to an acquisition method for sea ice concentration on the basis of the Ocean No. II satellite scanning microwave radiometer. The acquisition method for the sea ice concentration on the basis of the Ocean II satellite scanning microwave radiometer comprises the following steps: according to a first brightness temperature data of a typically characteristic area, a brightness temperature characteristic value is obtained; the typical characteristic area comprises a characteristic area of one-year ice, a characteristic area of multiyear ice and characteristic area of sea water; the first brightness temperature data is acquired through the Ocean II satellite scanning microwave radiometer; according to the brightness temperature characteristic value and a second brightness temperature data of a monitored area, dynamic brightness temperature characteristic value of the monitored area is acquired; the second brightness temperature data is acquired through the Ocean No. II satellite scanning microwave radiometer; according to the dynamic brightness temperature characteristic value of the monitored area, the dynamic sea ice concentration of the monitored area is acquired. The acquisition method for sea ice concentration on the basis of the Ocean II satellite scanning microwave radiometer overcomes the technical problem that the sea ice concentration of a correspondingly monitored area cannot be acquired on the basis of the data acquired by the Ocean II satellite in the prior art.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a sea ice density acquisition method based on the Haiyang No. 2 satellite scanning microwave radiometer. Background technique [0002] Sea ice density is the main parameter to describe polar sea ice, which is defined as the percentage of sea ice coverage per unit area. At present, the data used for sea ice density inversion mainly come from the spaceborne microwave radiometer. As a passive microwave sensor, the radiometer can distinguish sea ice from sea water by combining the observed brightness temperature in different bands and different polarization modes. The US Snow and Ice Data Center has provided polar sea ice density data with a spatial resolution of 25km obtained by spaceborne microwave radiometers since 1978, and the data of multiple microwave radiometers are used to invert this long-term series product, Such as SMMR (Scanning Multi-frequency Microwave...

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Problems solved by technology

[0004] Most of the existing methods in the world use the 89GHz brightness temperature data of the spaceborne radiometer to obtain the sea ice density in the monitoring area, but the HY-2 satellite microwave scanning radiometer does not have this band; the existing brightness temperature data based on the lower frequency band The sea ice density acquisition methods are all based on foreign spaceborne radiometers and cannot be directly applied to HY-2 satellites

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