1. HDAC Report R. Reulke and H. U. Keller UVIS Team – Meeting Boulder, 23
HDAC Report R.Reulke and H. U.Keller UVIS Team – Meeting Boulder, 23. June 2008

2. HDAC long-term Evaluation HDAC sensitivity change between 2003 and 2008
HDAC-sensitivity 2008: 20 cts/s/R

3. HDAC long-term Evaluation HDAC sensitivity change between 2003 and 2008
planet & moons (blue), stars (green)

4. HDAC long-term evaluation
Tools and input
Hot-Model evaluation and adaptation
Sun activity changes

5. HDAC long-term development Hot-Model “fit”
Hot-Model follows HDAC signal change as a function of S/C - position and view direction
Ly-a radiation from LASP Interactive Solar IRradiance Datacenter or LISIRD website
(Wavelength Range: to nm)
Constant model-factor during
confirmation of sensitivity

13. HDAC medium-term plans Hot-Model “fit”
Do physics
looking for a PhD student
update hot model
Improve cleanliness of HDAC data (contamination by stars and moons)
Continue to monitor sensitivity
crosscheck with spectrometer
Crosscheck modulation measurements to look at status
Improve hydrogen model
Look for hydrogen in Saturnian system