NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
MODIS Solar Diffuser: Modelled and Actual PerformanceThe Moderate Resolution Imaging Spectroradiometer (MODIS) instrument's solar diffuser is used in its radiometric calibration for the reflective solar bands (VIS, NTR, and SWIR) ranging from 0.41 to 2.1 micron. The sun illuminates the solar diffuser either directly or through a attenuation screen. The attenuation screen consists of a regular array of pin holes. The attenuated illumination pattern on the solar diffuser is not uniform, but consists of a multitude of pin-hole images of the sun. This non-uniform illumination produces small, but noticeable radiometric effects. A description of the computer model used to simulate the effects of the attenuation screen is given and the predictions of the model are compared with actual, on-orbit, calibration measurements.
Document ID
20010016270
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Waluschka, Eugene
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Xiong, Xiao-Xiong
(Science Systems and Applications, Inc. Seabrook, MD United States)
Esposito, Joe
(Science Systems and Applications, Inc. Seabrook, MD United States)
Wang, Xin-Dong
(Science Systems and Applications, Inc. Seabrook, MD United States)
Krebs, Carolyn
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available