An Improved Algorithm for the Operational Calibration of the High-Resolution Infrared Radiation Sounder

Author:

Cao Changyong1,Jarva Kenneth2,Ciren Pubu3

Affiliation:

1. NOAA/NESDIS/Center for Satellite Applications and Research, Camp Springs, Maryland

2. Science and Technology Corporation, Greenbelt, Maryland

3. QSS Group, Inc., Lanham, Maryland

Abstract

Abstract Radiance data from the High-Resolution Infrared Radiation Sounder (HIRS) have been used routinely in both direct radiance assimilation for numerical weather prediction and climate change detection studies. The operational HIRS calibration algorithm is critical for producing accurate radiance to meet the user’s needs, and it has significant impacts on products at all levels. Since the HIRS does not calibrate every scan line, the calibration coefficients between calibration cycles have to be interpolated based on a number of assumptions. In the more than 25-yr history of operational HIRS calibration, several interpolation methods have been used and, unfortunately, depending on which method is used, these algorithms can produce HIRS level 1b radiance data with significant differences. By analyzing the relationship between the instrument self-emission and gain change during filter temperature fluctuations, in this paper a significant flaw in the previous operational calibration algorithm (version 3) is identified. This caused calibration errors greater than 0.5 K and periodically degraded the HIRS radiance data quality of NOAA-15, -16, and -17 between 1998 and 2005. A new HIRS calibration algorithm (version 4) is introduced to improve the calibration accuracy, along with better indicators for instrument noise in the level 1b data. The new algorithm has been validated in parallel tests before it became operational at NOAA/National Environmental Satellite Data and Information Service (NESDIS). Test results show that significant improvements in calibration accuracy can be achieved especially for NOAA-15/HIRS. Several areas of further calibration improvements are also identified. The new algorithm has been used for all operational satellites at NOAA/NESDIS since 28 April 2005.

Publisher

American Meteorological Society

Subject

Atmospheric Science,Ocean Engineering

Reference7 articles.

1. Cao, C., M.Weinreb, and S.Kaplan, 2004: Verification of the HIRS spectral response functions for more accurate atmospheric sounding. Proc. Conf. on Characterization and Radiometric Calibration for Remote Sensing, Logan, UT, Utah State University, CD-ROM.

2. Inter-satellite calibration of the High Resolution Infrared Radiation Sounders on NOAA-15, -16, and -17 from Simultaneous Nadir Overpass Observations.;Cao;J. Atmos. Oceanic Technol.,2005

3. Goodrum, G., K. B.Kidwell, and W.Winston, 2000: NOAA KLM User’s Guide. Department of Commerce, Washington, DC. [Available online at http://www2.ncdc.noaa.gov/docs/klm/.].

4. ITT , 1996: High Resolution Infrared Radiation Sounder HIRS/4 Technical Description. ITT Aerospace/Communications Division, Contract NAS5-30384, Doc. 8168948, 183 pp.

5. ITT , 1998: High Resolution Infrared Radiation Sounder HIRS/3 Instrument Manual and Alignment/Calibration Handbook & Optical Data. ITT Aerospace/Communications Division, Contract NAS5-30384, Doc. 8162669, 706 pp.

Cited by 16 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3