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FY2010 - FY2011 Re-processing Information


A re-calibration of the 30" integrating sphere used to radiometrically calibrate the MASTER V/SWIR bands was showing a loss of intensity in the shorter wavelengths. This sphere, which was calibrated regularly by the Goddard EOS calibration team, had been historically quite stable. It became apparent that the BaSO4 coating was deteriorating, causing it to "yellow" (it has been replaced). Please do not hesitate to contact us for further explanation or discussion.

Port 1 (VIS)
Channel Center µm % Change*
1 0.47 -7.3%
2 0.51 -6.1%
3 0.55 -5.4%
4 0.59 -5.1%
5 0.67 -4.6%
6 0.71 -4.3%
7 0.75 -4.2%
8 0.81 -4.1%
9 0.87 -4.1%
10 0.91 -3.9%
11 0.96 -3.5%
Port 2 (SWIR)
Channel Center µm % Change*
12 1.61 -1.0%
13 1.66 -0.9%
14 1.72 -0.9%
15 1.77 -1.1%
16 1.83 -1.3%
17 1.88 -1.9%
18 1.93 -3.8%
19 1.98 -1.8%
20 2.08 0.1%
21 2.16 0.2%
22 2.21 0.5%
23 2.26 0.7%
24 2.33 -0.3%
25 2.40 3.3%**
* Source uncertainly is +/- 2%, per GSFC
** The SRF for band 25 extends beyond the 2400nm upper limit of the NIST source that NASA-GSFC uses to calibrate the Ames integrating sphere; combined with increased atmospheric attenuation in this region, there is a larger uncertainly in this band.

Affected Flights

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