Paper Info
Title
Radiometric calibration of G-LiHT's imaging spectrometer using GLAMR for satellite sensor intercalibration
Abstract
NASA Goddard's Lidar, Hyperspectral and Thermal Imager (G-LiHT) facilitates simultaneous measurements beneficial to variety of applications. Of the suite of "off-the shelf" instruments of G-LiHT, the Visible Near-Infrared (VNIR) Imaging Spectrometer acquires high resolution spectral measurements (1.5 nm resolution) from 0.4 to 1 mu m. Goddard Space Flight Center's Laser for Absolute Measurement of Response (GLAMR) was used to measure the absolute spectral response (ASR) of the G-LiHT's imaging spectrometer. Continuously tunable lasers coupled to an integrating sphere allow a radiance-based calibration for the detectors at reflective solar wavelengths. GLAMR measurements, covering a wavelength range from 0.58 to 0.99 mu m were acquired between July 30 to August 2, 2013. In order to account for the large field-of-view (50 degrees), G-LiHT was rotated in 2 degree increments so that the same area of the sphere is viewed by all detectors. Using this data along with the coincident Silicon trap radiometer measurements, the ASR was computed. The derived calibration parameters for G-LiHT's Imaging Spectrometer are to be transferred to near-simultaneous measurements of Landsat sensors. Calibration uncertainty of G-LiHT is 1-3% depending spectral region and transferring this traceability to coincident satellite sensors has 3-5% depending on spectral region.
Year
DOI
Venue
2015
10.1117/12.2188763
Proceedings of SPIE
Keywords
Field
DocType
lidar,sensors,calibration,lasers,silicon,spectrometers,near infrared,satellites
Radiometric calibration,VNIR,Imaging spectrometer,Integrating sphere,Remote sensing,Optics,Spectrometer,Hyperspectral imaging,Radiance,Physics,Radiometer
Conference
Volume
ISSN
Citations 
9607
0277-786X
0
PageRank 
References 
Authors
0.34
2
5
Name
Order
Citations
PageRank
Amit Angal17227.54
Joel McCorkel2157.86
Bruce D. Cook39314.69
Lawrence A. Corp43913.38
kurtis j thome5113.14