Absolute Calibration of the MTVZA-GY Microwave Radiometer Atmospheric Sounding Channels

被引：8
|
作者：
Uspensky, A. B. [1 ]
Asmus, V. V. [1 ]
Kozlov, A. A. [1 ]
Kramchaninova, E. [1 ]
Streltsov, A. M. [2 ]
Chernyavsky, G. Ya. [2 ]
Cherny, I. V. [2 ]
机构：
[1] FGBU Planeta, Moscow, Russia
[2] NTTs Kosmonit, Moscow, Russia
来源：
IZVESTIYA ATMOSPHERIC AND OCEANIC PHYSICS | 2017年 / 53卷 / 09期
关键词：
microwave imager/sounder; absolute calibration; antenna and sensor brightness temperatures; radiative transfer model; emissivity; antenna pattern; radiosonde data; numerical weather prediction; TEMPERATURE;
D O I：
10.1134/S0001433817090316
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
The microwave MTVZA-GY imager/sounder is one of the key instruments onboard the Meteor-M N2 satellite (launched in July, 2014). The MTVZA-GY data assimilation in numerical weather prediction (NWP) schemes should provide a significant positive impact. The method of absolute calibration for MTVZA-GY atmospheric sounding channels is under discussion. Absolute calibration means converting the antenna temperatures, measured by the MTVZA-GY, to the sensor brightness temperatures and is performed using accurate radiance simulations for selected regions. The NWP products are used as input to the radiance simulation code together with the data on surface emissivity. For the sea surface, emissivity is calculated with a parameterized model. For the land surface, emissivity is specified using a public database. The results of absolute calibration of the MTVZA-GY temperature (52-57 GHz) and humidity (183.3 GHz) sounding channels are presented.
引用
收藏
页码：1192 / 1204
页数：13
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