| huangshan |
2008-08-12 11:26 |
Summary rw58bkh6
This study is a detailed follow-up to two previous studies concerning stray light in the EO-1 ky[FNgQ3n
telescope (see EO-1 Stray Light Analysis Reports 1 and 2). Following coating of the EO-1 flight ;B!&( 50e
mirrors, the BRDF was measured by SSG, then re-measured by Schmitt Measurement Systems. ](3=7!!J
The stray spectral radiance from the Stray Radiation Scene described in the LANDSAT 7 ?|{P]i?)'
specification was recalculated using the Schmitt BRDF measurements and a simple spreadsheet WG1x:,-
calculation. This calculation assumes the Point Source Transmittance (PST) is rotationally %}2 s74D*Z
symmetric, and does an integration over the Stray Radiation Scene. w 8T#~Dc
To refine this estimate of stray radiance, ray-trace simulations were done using TracePro to better 'Kc;~a
predict the PST. The PST was used to calculate the stray spectral radiance using a C++ computer (LQ*U3J]_
program written for this purpose. The stray spectral radiance was computed by integrating over i?||R|>;"'
the LANDSAT 7 Stray Radiation Scene, weighed by the PST.
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