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ELS Recalibration Lin Gilbert, MSSL, 17 th Nov 2010 PowerPoint Presentation
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ELS Recalibration Lin Gilbert, MSSL, 17 th Nov 2010

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ELS Recalibration Lin Gilbert, MSSL, 17 th Nov 2010

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  1. ELS Recalibration Lin Gilbert, MSSL, 17th Nov 2010

  2. All ELS data for the Cassini mission has been reprocessed • It now has • U3 upgrades • New calibrations The usual browse plot website has these updates http://www.mssl.ucl.ac.uk/planetary/missions/ Cassini/cassiniplots/cassiniplots.php Username cassini Password CassELS!

  3. Moments will need further updating • ELS background model to be updated • Extra error measures to be added Calibration files have been issued They are available on request from lkg@mssl.ucl.ac.uk

  4. Since the recalibration there have been 8 gain tests • Plot the ELS thresholds over time to check accuracy • Gain tests come in two parts • The second part is preferred • It accumulates counts over long periods • Of the 8 tests • second part usable once (shown in purple) • first part usable 5 times (shown in red) This was due to fluctuations in the ambient plasma There is no way to improve the situation

  5. Data profiles from all gain tests since 1st July 2010