Proceedings Paper
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Paper Abstract
The NASA/NOAA Visible Infrared Imager Radiometer Suite (VIIRS) instrument on‐board the Suomi National
Polar‐orbiting Partnership satellite was launched in October 2011. Assessment of VIIRS’ geometric performance
includes measurements of the sensor’s spatial response, band‐to‐band co‐registration (BBR), and geolocation accuracy
and precision.
The instrument sensor (detector) spatial response is estimated by line spread functions (LSFs) in the scan and track
directions. The LSFs are parameterized by dynamic field of view in the scan direction and instantaneous FOV in the
track direction, modulation transfer function for the 16 moderate resolution bands (M‐bands), and horizontal spatial
resolution for the five imagery bands (I‐bands). VIIRS BBR for the M and I bands is defined as the overlapped fractional
area of angular pixel sizes from the corresponding detectors in a band pair, including nested I‐bands into M‐bands, and
measured on-orbit using lunar and earth data. VIIRS geolocation accuracy and precision are affected by instrument
parameters, ancillary data (i.e., ephemeris and attitude), and thermally induced pointing variations with respect to orbital
position. These are being tracked by a ground control point matching program and corrected in geolocation parameter
lookup tables in the ground data processing software.
This on-orbit geometric performance assessment is an important aspect of the VIIRS sensor data record calibration and
validation process. In this paper, we will discuss VIIRS’ geometric performance based on the first seven‐month of
VIIRS' on-orbit earth and lunar data, and compare these results with the at‐launch performance based on ground test data
and numerical modeling results. Overall, VIIRS’ on-orbit geometric performance is very good and matches the prelaunch
performance, and is thus expected to meet the needs of both the long-term monitoring and operational
communities.
Paper Details
Date Published: 15 October 2012
PDF: 13 pages
Proc. SPIE 8510, Earth Observing Systems XVII, 851013 (15 October 2012); doi: 10.1117/12.929925
Published in SPIE Proceedings Vol. 8510:
Earth Observing Systems XVII
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)
PDF: 13 pages
Proc. SPIE 8510, Earth Observing Systems XVII, 851013 (15 October 2012); doi: 10.1117/12.929925
Show Author Affiliations
Robert E. Wolfe, NASA Goddard Space Flight Ctr. (United States)
Guoqing Lin, NASA Goddard Space Flight Ctr. (United States)
Innovim (United States)
Masahiro Nishihama, NASA Goddard Space Flight Ctr. (United States)
Sigma Space Corp. (United States)
Guoqing Lin, NASA Goddard Space Flight Ctr. (United States)
Innovim (United States)
Masahiro Nishihama, NASA Goddard Space Flight Ctr. (United States)
Sigma Space Corp. (United States)
Krishna P. Tewari, NASA Goddard Space Flight Ctr. (United States)
Innovim (United States)
Enrique Montano, NASA Goddard Space Flight Ctr. (United States)
Sigma Space Corp. (United States)
Innovim (United States)
Enrique Montano, NASA Goddard Space Flight Ctr. (United States)
Sigma Space Corp. (United States)
Published in SPIE Proceedings Vol. 8510:
Earth Observing Systems XVII
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)
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