Imager-to-radiometer in-flight cross calibration: RSP radiometric comparison with airborne and satellite sensors
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 me...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-03-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/9/955/2016/amt-9-955-2016.pdf |
| Summary: | 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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| ISSN: | 1867-1381 1867-8548 |