Paper Info
Title
Calibration and Validation of Feng Yun-3-D Microwave Humidity Sounder II
Abstract
On November 15, 2017, the fourth satellite, Feng Yun-3D (FY-3D), of the new generation of Chinese polar orbit meteorological satellites was successfully launched into orbit. As one of the key payloads, the second-generation Microwave Humidity Sounder (MWHS II) has 15 channels for observing atmospheric temperature and moisture. In the ground data processing system, the calibration is completed for every scanning period, and then, brightness temperature (TB) data are obtained with calibration coefficients. In order to analyze the performance of MWHS II, one year of in-orbit data are used to monitor the trend of internal blackbody target temperature, instrument temperature, calibration counts, and automatic gain control (AGC), and the results indicate whether the instrument is working well. The instrument noise equivalent differential temperature (NEDT) is calculated, and the value satisfies the design requirements. Two methods are used to validate FY-3D MWHS II measurements. One is the simultaneous nadir overpass (SNO) approach: in this method, ATMS is chosen as the reference sensor, and the standard deviations for five humidity sounding channels are all less than 1.3 K. In the alternate approach, a comparison of the observed and simulated TB of MWHS II is carried out between FY-3C and FY-3D. The results also demonstrate a consistent performance between the two instruments.
Year
DOI
Venue
2020
10.1109/LGRS.2019.2957403
IEEE Geoscience and Remote Sensing Letters
Keywords
DocType
Volume
Calibration,Feng Yun-3D (FY-3D),second-generation Microwave Humidity Sounder (MWHS II),validation
Journal
17
Issue
ISSN
Citations 
11
1545-598X
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Yang Guo121.86
Jieying He2109.68
Songyan Gu302.37
Naimeng Lu4306.21