TY - GEN
T1 - Validation of Bidirectional Reflectance Models Using the First Scene Acquired by the CHRIS Sensor over the Jornada Experimental Range
AU - Chopping, Mark
AU - Su, Lihong
AU - Schmugge, Thomas
AU - Rango, Albert
PY - 2003
Y1 - 2003
N2 - Multi-angular reflectance data over desert grasslands and shrublands in the USDA, ARS Jornada Experimental Range near Las Cruces, New Mexico, were obtained by the Compact High Resolution Imaging Spectrometer flown on the PROBA satellite on August 5, 2002. An experimental satellite-borne sensor, the CHRIS, is one of the few sources of consistent multi-angular reflectance data on kilometer scales, providing up to five looks at a given target within the space of a few minutes. Two images acquired at different sun-target-sensor geometries were used to examine the validity of a simplified geometric-optical model (SGM) of bidirectional reflectance which incorporates a priori, empirical knowledge of the scattering properties of the underlying soil. The model is based on principles of geometric-optics while providing a mechanism for encapsulating volume scattering effects. It has been subjected to sensitivity studies and tested using a radiosity-based method, with simulations driven by detailed plant maps and measurements of the optical properties of plants and soils. However, up to this point it has only been tested against multi-angular data acquired from the air by tilting a digital multispectral camera; work here using data from the CHRIS sensor extends and corroborates the results presented in the previous studies.
AB - Multi-angular reflectance data over desert grasslands and shrublands in the USDA, ARS Jornada Experimental Range near Las Cruces, New Mexico, were obtained by the Compact High Resolution Imaging Spectrometer flown on the PROBA satellite on August 5, 2002. An experimental satellite-borne sensor, the CHRIS, is one of the few sources of consistent multi-angular reflectance data on kilometer scales, providing up to five looks at a given target within the space of a few minutes. Two images acquired at different sun-target-sensor geometries were used to examine the validity of a simplified geometric-optical model (SGM) of bidirectional reflectance which incorporates a priori, empirical knowledge of the scattering properties of the underlying soil. The model is based on principles of geometric-optics while providing a mechanism for encapsulating volume scattering effects. It has been subjected to sensitivity studies and tested using a radiosity-based method, with simulations driven by detailed plant maps and measurements of the optical properties of plants and soils. However, up to this point it has only been tested against multi-angular data acquired from the air by tilting a digital multispectral camera; work here using data from the CHRIS sensor extends and corroborates the results presented in the previous studies.
UR - https://www.scopus.com/pages/publications/0242625265
M3 - Conference contribution
AN - SCOPUS:0242625265
SN - 0780379292
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 4425
EP - 4427
BT - IGARSS 2003
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2003 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2003
Y2 - 21 July 2003 through 25 July 2003
ER -