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MXR-30004-ARC WP 06/21
Table 3. WorldView-3 cavis absolute radiometric calibration adjustment factors and banded
top-of-atmosphere solar irradiance
The CAVIS absolute radiometric calibration is performed over the Saharan
Desert. The USGS Radiometric Calibration site "Libya4" in the Saharan desert
is used for monitoring the radiometric stability of the Maxar sensors, to provide
a winter use calibration site, and to perform absolute radiometric calibration
of large pixel sensors (WordView-3 CAVIS has a 30-m nadir pixel and cannot be
calibrated on our 20 x 20 m tarps). Imagery taken over the site that is calibrated
by our vicarious efforts in Colorado are used to create an empirical model
of expected top-of-atmosphere reflectance. Comparisons to other agency
instruments are performed over the secondary sites that include Libya4 and
Railroad Valley in Nevada, USA.
Version 2016v1.L4 Thuillier 2003
Band GAIN OFFSET E-Sun
Desert Clouds 1.377 0 1718.25
Aerosol-1 1.051 0 2001.13
Green 0.816 0 1831.3
Aerosol-2 0.869 0 1537.38
Water-1 0.849 0 955.658
Water-2 0.677 0 866.791
Water-3 0.819 0 807.875
NDVI-SWIR 0.842 0 460.196
Cirrus 1 0 361.412
Snow 0.897 0 230.349
Aerosol-3 1.081 0 89.1345
Aerosol-3 Parallax 1.076 0 89.1345
TRAINING THE NEXT
GENERATION OF SCIENTISTS
AND TECHNICIANS
Maxar is proud to invite students from the
Colorado Space Grant Consortium at the
University of Colorado in Boulder to work
in our main radiometric calibration facility.
Freshmen to graduate-level students
from many different majors are given the
opportunity to be a part of the scientific
process and learn what it is like to work in
a corporate aerospace environment.
ABSOLUTE RADIOMETRIC CALIBRATION
