Establishing on-orbit calibration links among operational satellite radiometers for the implementation of GEOSS

Changyong Cao

doi:10.1117/12.683960

1 September 2006 Establishing on-orbit calibration links among operational satellite radiometers for the implementation of GEOSS

Changyong Cao

Author Affiliations +

Proceedings Volume 6301, Atmospheric and Environmental Remote Sensing Data Processing and Utilization II: Perspective on Calibration/Validation Initiatives and Strategies; 630102 (2006) https://doi.org/10.1117/12.683960
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Numerical weather prediction and climate change detection studies critically depend on accurate, reliable, and consistent satellite radiance data from multiple sensors onboard a constellation of satellites. The calibration consistency across international satellites is further challenged in the implementation of GEOSS (Global Earth Observation System of Systems). As a result, establishing on-orbit calibration links among operational satellite radiometers has become critical. This paper provides an overview of the current status and challenges in the on-orbit calibration traceability among operational satellite radiometers. It then proposes to develop an on-orbit calibration reference network to establish the calibration links. The Simultaneous Nadir Overpass method for intersatellite calibration is a key methodology for the network. Other methodologies including vicarious calibration, moon calibration, and airborne campaigns will also be used to support the network. Example applications of the network for operational satellite radiometers are demonstrated. By establishing an on-orbit calibration network that makes the calibration of similar radiometers traceable to each other, a quasi on-orbit calibration standard can be established in the long-term. The system will help us diagnose radiance biases for data assimilation and time series analysis. It will also bring together a world of radiometers to facilitate the implementation of GEOSS.

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Changyong Cao "Establishing on-orbit calibration links among operational satellite radiometers for the implementation of GEOSS", Proc. SPIE 6301, Atmospheric and Environmental Remote Sensing Data Processing and Utilization II: Perspective on Calibration/Validation Initiatives and Strategies, 630102 (1 September 2006); https://doi.org/10.1117/12.683960

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KEYWORDS

Calibration

Satellites

Radiometry

Infrared radiation

Meteorological satellites

Microwave radiation

MODIS

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