Using AIRS and IASI data to evaluate absolute radiometric accuracy and stability for climate applications

Hartmut H. Aumann; Thomas S. Pagano

doi:10.1117/12.795225

6 September 2008 Using AIRS and IASI data to evaluate absolute radiometric accuracy and stability for climate applications

Hartmut H. Aumann, Thomas S. Pagano

Author Affiliations +

Proceedings Volume 7085, Atmospheric and Environmental Remote Sensing Data Processing and Utilization IV: Readiness for GEOSS II; 708504 (2008) https://doi.org/10.1117/12.795225
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

The creation of multi-decadal data sets for climate research requires better than 100 mK absolute calibration accuracy for the full range of spectral temperatures encountered under global conditions. Validation that this accuracy is achieved by the operational hyperspectral sounders from polar orbit is facilitated by comparing data from two instruments. Extreme radiometric calibration stability is critical to allow a long time series of noisy, but presumably long-term accurate truth measurements to be used for the validation of absolute accuracy at the 100 mK level. We use the RTGSST in the tropical oceans as ground truth. The difference between the AIRS derived sst2616 and the RTGSST based on six years of data shows a systematic cold bias of about 250 mK, but better than 4 mK/year stability. The double difference between AIRS and the RTGSST and IASI and the RTGSST with less than one year of data already allows statements at the 100 mK absolute level. It shows a 60 mK difference between the AIRS and the IASI calibration at 2616 cm^-1 and 300 K, with a statistically insignificant 20 mK shift in six months.

Citation Download Citation

Hartmut H. Aumann and Thomas S. Pagano "Using AIRS and IASI data to evaluate absolute radiometric accuracy and stability for climate applications", Proc. SPIE 7085, Atmospheric and Environmental Remote Sensing Data Processing and Utilization IV: Readiness for GEOSS II, 708504 (6 September 2008); https://doi.org/10.1117/12.795225

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