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Long-term vicarious calibration efforts of MERIS at railroad valley playa (NV) - An update


Kneubühler, Mathias; Schaepman, Michael E; Thome, Kurt (2006). Long-term vicarious calibration efforts of MERIS at railroad valley playa (NV) - An update. In: 2nd Working Meeting on MERIS and AATSR Calibration and Geophysical Validation (MAVT-2006), Frascati (I), 20 March 2006 - 24 March 2006, online.

Abstract

The launch of ESA’s ENVISAT in March 2002 was followed by a commissioning phase for all ENVISAT instruments to verify the performance of the instruments and recommend possible adjustments of the calibration or the product algorithms before the data was widely distributed. Long-term activities to assess MERIS’ performance are ongoing. Several vicarious calibration (VC) experiments for MERIS were performed by the Optical Sciences Center, University of Arizona, and the Remote Sensing Laboratories, University of Zürich during summer 2002 and 2003 [13][14]. The purpose of such activities is the acquisition of in-situ measurements of surface and atmospheric conditions over a bright, uniform land target, preferably during the time of MERIS data acquisition. The experiments were performed on a well monitored reference calibration site (Railroad Valley Playa, Nevada, USA), which has previously been used to calibrate most relevant satellite instruments (e.g., MODIS, ETM+, ASTER, Hyperion). In-situ data were used to compute top-of-atmosphere (TOA) radiances which were compared to the MERIS TOA radiances (Level 1b full resolution product) to determine the in-flight radiometric response of the on-orbit sensor. In order to assess long-term radiometric performance of MERIS data, nine MERIS scenes acquired over Railroad Valley Playa during July to November 2004 were investigated. The accuracy of the 2004 vicarious calibration methodology were compared to the results of previous work on 2002/2003 data sets. In addition, spatial and temporal uniformity and radiometric temporal stability of the Playa test site, being important for long-term control of satellite sensor data, were investigated using numerous MERIS scenes dating between 2002 and 2004.

Abstract

The launch of ESA’s ENVISAT in March 2002 was followed by a commissioning phase for all ENVISAT instruments to verify the performance of the instruments and recommend possible adjustments of the calibration or the product algorithms before the data was widely distributed. Long-term activities to assess MERIS’ performance are ongoing. Several vicarious calibration (VC) experiments for MERIS were performed by the Optical Sciences Center, University of Arizona, and the Remote Sensing Laboratories, University of Zürich during summer 2002 and 2003 [13][14]. The purpose of such activities is the acquisition of in-situ measurements of surface and atmospheric conditions over a bright, uniform land target, preferably during the time of MERIS data acquisition. The experiments were performed on a well monitored reference calibration site (Railroad Valley Playa, Nevada, USA), which has previously been used to calibrate most relevant satellite instruments (e.g., MODIS, ETM+, ASTER, Hyperion). In-situ data were used to compute top-of-atmosphere (TOA) radiances which were compared to the MERIS TOA radiances (Level 1b full resolution product) to determine the in-flight radiometric response of the on-orbit sensor. In order to assess long-term radiometric performance of MERIS data, nine MERIS scenes acquired over Railroad Valley Playa during July to November 2004 were investigated. The accuracy of the 2004 vicarious calibration methodology were compared to the results of previous work on 2002/2003 data sets. In addition, spatial and temporal uniformity and radiometric temporal stability of the Playa test site, being important for long-term control of satellite sensor data, were investigated using numerous MERIS scenes dating between 2002 and 2004.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), not refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:24 March 2006
Deposited On:07 May 2013 09:55
Last Modified:03 Aug 2017 11:23
Publisher:European Space Agency * Communication Production Office
Series Name:ESA - SP
Number:615
ISSN:1609-042X
ISBN:92-9092-926-X
Official URL:https://earth.esa.int/workshops/mavt_2006/papers/13_kneub.pdf
Related URLs:https://earth.esa.int/workshops/mavt_2006/ (Organisation)

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