Detector Temperatures

The temperatures of the 8 detectors are crucial parameters responsible for data quality. They have to stay within pre-defined limits to allow to apply on-ground calibration results to in-flight measurement data.

On-board, the temperatures are controlled via trim heaters (TC) which can be adjusted to yield the required temperatures. The current TC settings and their history can be found under Thermal History. Monitoring of the detector temperatures occurs on a weekly basis for all detectors. Thus the requirements of the operational procedure P-I-N-401 (RRU_Monitoring) as described in the IOM is fulfilled.

The weekly monitoring generates plots of average temperature per orbit spanning an interval of 100 orbits. Up to orbit 7664, two detectors form one plot (detectors 1&2 have index 1, 3&4 index 2, 5&6 index 3, 7&8 index 4). From orbit 7665 onwards all detectors can be accessed via a single webpage. The plots indicate the limits of each detector as horizontal lines. Whenever the HK telemetry covers more than 90% of an orbit, the data points are displayed as red dots, coverage < 90% is outlined as green dots. The vertical bar at each data point illustrates the variability of a parameter over an orbit as it links the minimum and the maximum value in that orbit.

Operational detector temperature monitoring started in January 2003. The temperatures for the year 2002 are displayed in the summary graphs which can be accessed detectorwise below. Individual years are distinguished via the colour coding. Spikes are due to phases with decontaminations (up) or modes lower than MEASUREMENT (down). The red horizontal lines are the specified temperature limits.

Select year: 2012 / 2011 / / 2010 / 2009 / 2008 / 2007 / 2006 / 2005 / 2004 / 2003
Display detector: detector 1 / detector 2 / detector 3 / detector 4 / detector 5 / detector 6 / detector 7 / detector 8