Preflight and Vicarious Calibration of Artemis

Thome, Kurtis J.; Biggar, Stuart F.; Anderson, Nikolaus; Czapla-Myers, Jeffrey S.; Lockwood, Ronald B.; Miller, Sawyer; Cooley, T.; Chrien, Thomas G.; Schiller, Stephen; Silny, John F.; Glennon, Mary Ann

doi:10.1109/igarss.2008.4778840

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…The accuracy of the reflectance-based method has improved over time as equipment and procedures are upgraded, in many instances as low as 1.5%-2.5% uncertainty [5]. The manned vicarious calibrations provided by RSG have been helpful to numerous satellite and airborne systems [6][7][8].…”

Section: Introductionmentioning

confidence: 98%

Design and calibration of field deployable ground-viewing radiometers

et al. 2013

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Three improved ground-viewing radiometers were built to support the Radiometric Calibration Test Site (RadCaTS) developed by the Remote Sensing Group (RSG) at the University of Arizona. Improved over previous light-emitting diode based versions, these filter-based radiometers employ seven silicon detectors and one InGaAs detector covering a wavelength range of 400-1550 nm. They are temperature controlled and designed for greater stability and lower noise. The radiometer systems show signal-to-noise ratios of greater than 1000 for all eight channels at typical field calibration signal levels. Predeployment laboratory radiance calibrations using a 1 m spherical integrating source compare well with in situ field calibrations using the solar radiation based calibration method; all bands are within ±2.7% for the case tested.

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Section: Introductionmentioning

confidence: 98%

Design and calibration of field deployable ground-viewing radiometers

et al. 2013

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“…[1][2][3][4][5][6][7][8][9][10][11][12] The Remote Sensing Group (RSG) of the College of Optical Sciences at the University of Arizona has provided preflight and post-launch vicarious radiometric calibration data to national and commercial satellite operators for 25 + years. 13,14 Post-launch radiometric calibration techniques include in situ measurements at suitable test sites, which include Railroad Valley, Nevada, USA. The reflectance-based approach has typically been used by many groups involved in radiometric calibration, and it requires making surface reflectance and atmospheric measurements for a given time of interest.…”

Section: Introductionmentioning

confidence: 99%

Directional reflectance studies in support of the Radiometric Calibration Test Site (RadCaTS) at Railroad Valley

Czapla-Myers

Coburn

Thome

et al. 2018

Earth Observing Systems XXIII

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The Radiometric Calibration Test Site (RadCaTS) is a suite of commercial and custom instruments used to make measurements of the surface reflectance and atmosphere throughout the day at Railroad Valley, Nevada. It was developed in response to the need for daily radiometric calibration data for the vast array of Earth-observing sensors on orbit, which is continuously increasing as more nations and private companies launch individual environmental satellites as well as large constellations. The current suite of instruments at RadCaTS includes five ground-viewing radiometers (GVRs), four of which view the surface in a nadir-viewing configuration. Many sensors such as those on Landsat-7 and Landsat-8 view Railroad Valley within 3° of nadir, while others such as those on Sentinel-2A and -2B, RapidEye, Aqua, Suomi NPP, and Terra can view Railroad Valley at off-nadir angles. Past efforts have shown that the surface bidirectional reflectance distribution function (BRDF) has minimal impact on vicarious calibration uncertainties for views <10°, but the desire to use larger view angles has prompted the effort to develop a BRDF correction for data from RadCaTS. The current work investigates the application of Railroad Valley BRDF data derived from a BRF camera developed at the University of Arizona in the 1990s (but is no longer in use) to the current RadCaTS surface reflectance measurements. Also investigated are early results from directional reflectance studies using a mobile spectro-goniometer system during a round-robin field campaign in 2018. This work describes the preliminary results, the effects on current measurements, and the approach for future measurements.

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“…The Remote Sensing Group of the College of Optical Sciences at the University of Arizona has been directly involved in the preflight and post-launch radiometric calibration of Earth-observing sensors for over 30 years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14] In the past, various in situ measurement techniques were used to determine the top-of-atmosphere (TOA) spectral radiance for sensors under test, 1,6 but the reflectance-based approach has been the main field technique for the past 15 years. 7 It requires ground personnel to make measurements of the surface reflectance and atmosphere during a given time of interest (e.g.…”

Section: Introductionmentioning

confidence: 99%