Publications
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Using the Sonoran Desert test site to monitor the long-term radiometric stability of the Landsat TM/ETM+ and Terra MODIS sensors
Pseudo-invariant ground targets have been extensively used to monitor the long-term radiometric calibration stability of remote sensing instruments. The NASA MODIS Characterization Support Team (MCST), in collaboration with members from the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center, has previously demonstrated the use of pseudo-invariant ground sites for t
Authors
A. Angal, X. Xiong, T. Choi, G. Chander, A. Wu
An assessment of African test sites in the context of a global network of quality-assured reference standards
The Committee on Earth Observation Satellites (CEOS) Infrared and Visible Optical Sensors (IVOS) subgroup members established a set of CEOS-endorsed globally distributed reference standard test sites for the postlaunch calibration of space-based optical imaging sensors. This paper discusses the top five African pseudo-invariant sites (Libya 4, Mauritania 1/2, Algeria 3, Libya 1, and Algeria 5) tha
Authors
G. Chander, X. Xiong, A. Angal, T. Choi
Summary of current radiometric calibration coefficients for Landsat MSS, TM, ETM+, and EO-1 ALI sensors
This paper provides a summary of the current equations and rescaling factors for converting calibrated Digital Numbers (DNs) to absolute units of at-sensor spectral radiance, Top-Of-Atmosphere (TOA) reflectance, and at-sensor brightness temperature. It tabulates the necessary constants for the Multispectral Scanner (MSS), Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+), and Advanced Lan
Authors
G. Chander, B. L. Markham, D. L. Helder
Intra-annual NDVI validation of the Landsat 5 TM radiometric calibration
Multispectral data from the Landsat 5 (L5) Thematic Mapper (TM) sensor provide the backbone of the extensive archive of moderate‐resolution Earth imagery. Even after more than 24 years of service, the L5 TM is still operational. Given the longevity of the satellite, the detectors have aged and the sensor's radiometric characteristics have changed since launch. The calibration procedures and parame
Authors
G. Chander, D.P. Groeneveld
Updated radiometric calibration for the Landsat-5 thematic mapper reflective bands
The Landsat-5 Thematic Mapper (TM) has been the workhorse of the Landsat system. Launched in 1984, it continues collecting data through the time frame of this paper. Thus, it provides an invaluable link to the past history of the land features of the Earth's surface, and it becomes imperative to provide an accurate radiometric calibration of the reflective bands to the user community. Previous cal
Authors
D. L. Helder, B. L. Markham, K. J. Thome, J. A. Barsi, G. Chander, R. Malla
Evaluation and comparison of the IRS-P6 and the landsat sensors
The Indian Remote Sensing Satellite (IRS-P6), also called ResourceSat-1, was launched in a polar sun-synchronous orbit on October 17, 2003. It carries three sensors: the highresolution Linear Imaging Self-Scanner (LISS-IV), the mediumresolution Linear Imaging Self-Scanner (LISS-III), and the Advanced Wide-Field Sensor (AWiFS). These three sensors provide images of different resolutions and coverag
Authors
G. Chander, M.J. Coan, P. L. Scaramuzza
L5 TM radiometric recalibration procedure using the internal calibration trends from the NLAPS trending database
From the Landsat program's inception in 1972 to the present, the earth science user community has benefited from a historical record of remotely sensed data. The multispectral data from the Landsat 5 (L5) Thematic Mapper (TM) sensor provide the backbone for this extensive archive. Historically, the radiometric calibration procedure for this imagery used the instrument's response to the Internal Ca
Authors
G. Chander, Md. O. Haque, E. Micijevic, J. A. Barsi
Development of landsat-5 thematic mapper internal calibrator gain and offset table
The National Landsat Archive Production System (NLAPS) has been the primary processing system for Landsat data since U.S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) started archiving Landsat data. NLAPS converts raw satellite data into radiometrically and geometrically calibrated products. NLAPS has historically used the Internal Calibrator (IC) to calibrate the
Authors
J. A. Barsi, G. Chander, E. Micijevic, B. L. Markham, Md. O. Haque
Radiometric cross-calibration of the Terra MODIS and Landsat 7 ETM+ using an invariant desert site
A methodology for long-term radiometric cross-calibration between the Terra Moderate Resolution Imaging Spectroradiometer (MODIS) and Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) sensors was developed. The approach involves calibration of near-simultaneous surface observations between 2000 and 2007. Fifty-seven cloud-free image pairs were carefully selected over the Libyan desert for this s
Authors
T. Choi, A. Angal, G. Chander, X. Xiong
Landsat continuity: Issues and opportunities for land cover monitoring
Initiated in 1972, the Landsat program has provided a continuous record of earth observation for 35 years. The assemblage of Landsat spatial, spectral, and temporal resolutions, over a reasonably sized image extent, results in imagery that can be processed to represent land cover over large areas with an amount of spatial detail that is absolutely unique and indispensable for monitoring, managemen
Authors
M.A. Wulder, Joanne C. White, S.N. Goward, J. G. Masek, J. R. Irons, M. Herold, W.B. Cohen, Thomas R. Loveland, C. E. Woodcock
Preliminary radiometric calibration assessment of ALOS AVNIR-2
This paper summarizes the activities carried out in the frame of the data quality activities of the Advanced Visible and Near Infrared Radiometer type 2 (AVNIR-2) sensor onboard the Advanced Land Observing Satellite (ALOS). Assessment of the radiometric calibration of the AVNIR-2 multi-spectral imager is achieved via three intercomparisons to currently flying sensors over the Libyan desert, during
Authors
M. Bouvet, P. Goryl, G. Chander, R. Santer, S. Saunier
Radiometric recalibration procedure for landsat-5 thematic mapper data
The Landsat-5 (L5) satellite was launched on March 01, 1984, with a design life of three years. Incredibly, the L5 Thematic Mapper (TM) has collected data for 23 years. Over this time, the detectors have aged, and its radiometric characteristics have changed since launch. The calibration procedures and parameters have also changed with time. Revised radiometric calibrations have improved the radio
Authors
G. Chander, E. Micijevic, R. W. Hayes, J. A. Barsi