Publications
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The use of the Sonoran Desert as a pseudo-invariant site for optical sensor cross-calibration and long-term stability monitoring
The Sonoran Desert is a large, flat, pseudo-invariant site near the United States-Mexico border. It is one of the largest and hottest deserts in North America, with an area of 311,000 square km. This site is particularly suitable for calibration purposes because of its high spatial and spectral uniformity and reasonable temporal stability. This study uses measurements from four different sensors,
Authors
A. Angal, Gyanesh Chander, Taeyoung Choi, Aisheng Wu, Xiaoxiong Xiong
Monitoring on-orbit calibration stability of the Terra MODIS and Landsat 7 ETM+ sensors using pseudo-invariant test sites
The ability to detect and quantify changes in the Earth's environment depends on sensors that can provide calibrated, consistent measurements of the Earth's surface features through time. A critical step in this process is to put image data from different sensors onto a common radiometric scale. This work focuses on monitoring the long-term on-orbit calibration stability of the Terra Moderate Reso
Authors
G. Chander, X.(J.) Xiong, T.(J.) Choi, A. Angal
Radiometric, geometric, and image quality assessment of ALOS AVNIR-2 and PRISM sensors
The Advanced Land Observing Satellite (ALOS) was launched on January 24, 2006, by a Japan Aerospace Exploration Agency (JAXA) H-IIA launcher. It carries three remote-sensing sensors: 1) the Advanced Visible and Near-Infrared Radiometer type 2 (AVNIR-2); 2) the Panchromatic Remote-Sensing Instrument for Stereo Mapping (PRISM); and 3) the Phased-Array type L-band Synthetic Aperture Radar (PALSAR). W
Authors
S. Saunier, P. Goryl, G. Chander, R. Santer, M. Bouvet, B. Collet, A. Mambimba, Aksakal S. Kocaman
Terrestrial reference standard sites for postlaunch sensor calibration
In an era when the number of Earth observation satellites is rapidly growing and measurements from satellite sensors are used to address increasingly urgent global issues, often through synergistic and operational combinations of data from multiple sources, it is imperative that scientists and decision-makers are able to rely on the accuracy of Earth observation data products. The characterization
Authors
P. M. Teillet, G. Chander
Geometric evaluation and validation of aerial and satellite data using Sioux Falls Geometric test range
No abstract available.
Authors
Aparajithan Sampath, Donald Moe, Jon Christopherson, Gregory L. Stensaas
A procedure for radiometric recalibration of Landsat 5 TM reflective-band data
From the Landsat program's inception in 1972 to the present, the Earth science user community has been benefiting 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 the L5 TM imagery used the detectors' response to the in
Authors
G. Chander, M.O. Haque, E. Micijevic, J. A. Barsi
An overview of sensor calibration inter-comparison and applications
Long-term climate data records (CDR) are often constructed using observations made by multiple Earth observing sensors over a broad range of spectra and a large scale in both time and space. These sensors can be of the same or different types operated on the same or different platforms. They can be developed and built with different technologies and are likely operated over different time spans. I
Authors
Xiaoxiong Xiong, Changyong Cao, Gyanesh Chander
Introduction to the special issue-Terrestrial reference standard test sites for postlaunch calibration
No abstract available.
Authors
Gyanesh Chander, P. M. Teillet
Using the Sonoran and Libyan Desert test sites to monitor the temporal stability of reflective solar bands for Landsat 7 enhanced thematic mapper plus and Terra moderate resolution imaging spectroradiometer sensors
Remote sensing imagery is effective for monitoring environmental and climatic changes because of the extent of the global coverage and long time scale of the observations. Radiometric calibration of remote sensing sensors is essential for quantitative & qualitative science and applications. Pseudo-invariant ground targets have been extensively used to monitor the long-term radiometric calibration
Authors
Amit Angal, Xiaoxiong Xiong, Tae-young Choi, Gyanesh Chander, Aisheng Wu
Assessment of the short-term radiometric stability between Terra MODIS and Landsat 7 ETM+ sensors
Short-term radiometric stability was evaluated using continuous ETM+ scenes within a single orbit (contact period) and the corresponding MODIS scenes for the four matching solar reflective visible and near-infrared (VNIR) band pairs between the two sensors. The near-simultaneous earth observations were limited by the smaller swath size of ETM+ (183 km) compared to MODIS (2330 km). Two sets of cont
Authors
Taeyoung Choi, Xiaoxiong Xiong, Gyanesh Chander, A. Angal
Cross-comparison of the IRS-P6 AWiFS sensor with the L5 TM, L7 ETM+, & Terra MODIS sensors
As scientists and decision makers increasingly rely on multiple Earth-observing satellites to address urgent global issues, it is imperative that they can rely on the accuracy of Earth-observing data products. This paper focuses on the crosscomparison of the Indian Remote Sensing (IRS-P6) Advanced Wide Field Sensor (AWiFS) with the Landsat 5 (L5) Thematic Mapper (TM), Landsat 7 (L7) Enhanced Thema
Authors
G. Chander, X. Xiong, A. Angal, T. Choi, R. Malla
SSTL UK-DMC SLIM-6 data quality assessment
Satellite data from the Surrey Satellite Technology Limited (SSTL) United Kingdom (UK) Disaster Monitoring Constellation (DMC) were assessed for geometric and radiometric quality. The UK-DMC Surrey Linear Imager 6 (SLIM-6) sensor has a 32-m spatial resolution and a ground swath width of 640 km. The UK-DMC SLIM-6 design consists of a three-band imager with green, red, and near-infrared bands that a
Authors
G. Chander, S. Saunier, M.J. Choate, P. L. Scaramuzza