Preliminary radiometric calibration assessment of ALOS AVNIR-2
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Abstract
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 the first year of operation. All three methodologies indicate a slight underestimation of AVNIR-2 in band 1 by 4 to 7 % with respect to other sensors radiometric scale. Band 2 does not show any obvious bias. Results for band 3 are affected by saturation due to inappropriate gain setting. Two methodologies indicate no significant bias in band 4. Preliminary results indicate possible degradations of the AVNIR-2 channels, which, when modeled as an exponentially decreasing functions, have time constants of respectively 13.2 %.year -1 , 8.8 %.year -1 and 0.1 %.year -1 in band 1, 2 and 4 (with respect to the radiometric scale of the MEdium Resolution Imaging Spectrometer, MERIS). Longer time series of AVNIR-2 data are needed to draw final conclusions.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Preliminary radiometric calibration assessment of ALOS AVNIR-2 |
| DOI | 10.1109/IGARSS.2007.4423393 |
| Year Published | 2008 |
| Language | English |
| Contributing office(s) | Earth Resources Observation and Science (EROS) Center |
| Description | 4 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | International Geoscience and Remote Sensing Symposium (IGARSS) |
| First page | 2673 |
| Last page | 2676 |
| Conference Title | 2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007 |
| Conference Location | Barcelona, Spain |
| Conference Date | Jun 23-28, 2007 |