The sensitivity analysis of microwave radiometer's brightness temperature and geophysical parameters

Qiang Sun; Daren Lu

doi:10.1117/12.619873

12 May 2005 The sensitivity analysis of microwave radiometer's brightness temperature and geophysical parameters

Qiang Sun, Daren Lu

Proceedings Volume 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies; (2005) https://doi.org/10.1117/12.619873
Event: Optical Technologies for Atmospheric, Ocean, and Environmental Studies, 2004, Beijing, China

Abstract

In 2000 Frank Wentz and Thomas Meissner described a model function for the microwave radiometer's brightness temperature of the ocean and intervening atmosphere. The oceanic and atmospheric parameters are the sea surface temperature the near-surface wind speed the columnar water vapor and the columnar cloud liquid water. We analyzed the sensitivity between the geophysical parameters and the microwave radiometer's brightness temperature with the model function. First we find that the sensitive bands of the sea surface temperature are 6.93GHz v-pol and 10.65GHz v-pol; the sensitive bands ofthe near-surface wind speed are 6.93GHz h-pol, 10.65GHz h-pol, 18.7GHz h-pol, 23.8GHz h-pol, and 36.5GHz h-pol; the sensitive bands of the columnar water vapor are 18.7GHz v-pol, 18.7GHz h-pol, 23.8GHz v-pol, 23.8GHz h-pol, 36.5GHz v-pol and 36.5GHz h-pol; the sensitive bands of the columnar cloud liquid water are 36.5GHz v-pol and 36.5GHz h-pol. Second we find that the brightness temperature is sensitive to incidence angle variations. One-degree error in specifying incidence angle produces a 2.5K error in brightness temperature. The 2.5K errors in brightness temperature produce 5K errors in sea surface temperature and 4.5m/s error in near-surface wind speed. Third we find that brightness temperature is not sensitive to the sea surface salinity in the 6 to 37 GHz band.

Citation Download Citation

Qiang Sun and Daren Lu "The sensitivity analysis of microwave radiometer's brightness temperature and geophysical parameters", Proc. SPIE 5832, Optical Technologies for Atmospheric, Ocean, and Environmental Studies, (12 May 2005); https://doi.org/10.1117/12.619873

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available