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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 9, issue 3 | Copyright
Atmos. Meas. Tech., 9, 955-962, 2016
https://doi.org/10.5194/amt-9-955-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 08 Mar 2016

Research article | 08 Mar 2016

Imager-to-radiometer in-flight cross calibration: RSP radiometric comparison with airborne and satellite sensors

Joel McCorkel1, Brian Cairns2, and Andrzej Wasilewski2,3 Joel McCorkel et al.
  • 1NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 2NASA Goddard Institute for Space Studies, New York, NY, USA
  • 3Trinovim LLC, New York, NY, USA

Abstract. This work develops a method to compare the radiometric calibration between a radiometer and imagers hosted on aircraft and satellites. The radiometer is the airborne Research Scanning Polarimeter (RSP), which takes multi-angle, photo-polarimetric measurements in several spectral channels. The RSP measurements used in this work were coincident with measurements made by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS), which was on the same aircraft. These airborne measurements were also coincident with an overpass of the Landsat 8 Operational Land Imager (OLI). First we compare the RSP and OLI radiance measurements to AVIRIS since the spectral response of the multispectral instruments can be used to synthesize a spectrally equivalent signal from the imaging spectrometer data. We then explore a method that uses AVIRIS as a transfer between RSP and OLI to show that radiometric traceability of a satellite-based imager can be used to calibrate a radiometer despite differences in spectral channel sensitivities. This calibration transfer shows agreement within the uncertainty of both the various instruments for most spectral channels.

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The transfer and maintenance of international radiometric standards to satellite remote-sensing instruments is a labor-intensive and costly one. The goal is to provide specific examples for calibration implementation for a potential instrument mission and, with this, advance debate on the roles that the various satellite calibration techniques play in providing the best radiometric standards for Earth-observing sensors.
The transfer and maintenance of international radiometric standards to satellite remote-sensing...
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