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Characterization of modis and seawifs solar diffuser on-orbit degradation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | McClain, C. R. Angal, A. Sun, J. Xiong, X. Eplee Jr., R. E. Patt, F. S. |
| Copyright Year | 2009 |
| Description | MODIS has 20 reflective solar bands (RSB), covering the VIS, NIR, and SWIR spectral regions. They are calibrated on-orbit using a solar diffuser (SD) panel, made of space-grade Spectralon. The SD bi-directional reflectance factor (BRF) was characterized pre-launch by the instrument vendor reference to the NIST reflectance standard. Its on-orbit degradation is tracked by an on-board solar diffuser stability monitor (SDSM). The SeaWifS on-orbit calibration strategy uses monthly lunar observations to monitor the long-term radiometric stability of the instrument and applies daily observations of its solar diffuser (an aluminum plate coated with YB71 paint) to track the short-term changes in the instrument response. This paper provides an overview of MODIS and SeaWiFS SD observations, applications, and approaches used to track their on-orbit degradations. Results from sensors are presented with emphasis on the spectral dependence and temporal trends of the SD degradation. Lessons and challenges from the use of SD for sensor on-orbit calibration are also discussed. |
| File Size | 53002 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110006380 |
| Archival Resource Key | ark:/13960/t1tf4sb4f |
| Language | English |
| Publisher Date | 2009-08-03 |
| Access Restriction | Open |
| Subject Keyword | Imaging Spectrometers Degradation Stability Calibrating Spectral Bands Bidirectional Reflectance Launching Modis Radiometry Sea-viewing Wide Field-of-view Sensor Ntrs Nasa Technical Reports ServerĀ (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |