SRE-02-13
12/5/2013
MESSENGER MASCS UVVS Calibration Update - PDS 11
Prepared by: Aimee Merkel (LASP) and the MASCS team

Observations of Spica and Sirius by the UVVS are used to correct errors in 
the ground calibration for FUV, MUV and VIS channels. Motivated by 
differences we see in our observations compared to observations of Spica 
with the UVS on the Venus Express mission, a more careful analysis of the 
original Spica data was performed in September 2013. The result is a small 
adjustment (~15%) to the radiometric sensitivity of the short wavelength 
portion of the FUV channel. The adjustment to the FUV channel is included in 
PDS delivery 11.