DIFB_TEMPS
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o Mention in the dataset.cat that all temperatures are in degrees Celsius.

o MISSING_CONSTANT value should be changed to "-999.999" from "1.E32".

o Change the definition of the first column in the temperature tables to 
  indicate that the first column is, in fact, the day-of-year and fractional
  day.  Also mention the actual year.

o If possible, add diagram(s) showing where the sensors were located.

o Stephanie and Don H. will consult and make sure the tables we have are the
  20-minute average tables we were expecting.

o Consider adding simple plots to the documentation directory showing the
  temperature profile for each sensor or group of sensors.

o In the catinfo.txt file, the HRII.CAT file refers to the MRI, and the
  file for MRI is not included at all.

o Check refs in reference.cat.  Some are repetitive (AHEARNETAL2005), some
  are published in Icarus 2007 and need updates, and KLAASENETAL2006 needs
  to be updated to 2007.  Need to find every mention of these references
  in all files (example dataset.cat, deep_impact.cat, etc.) and use the
  correct REFERENCE_KEY_ID for them.


The following are outstanding questions for the data provider (Don Hampton)
which should be answered before these data are archived:
==========================================================================
- Do the 100-byte image headers include any of the TIB temperatures
  found in the tables you provided?  Or, do those values come only
  from the instruments' electronics telemetry boards?

- HRI CCD A & B sensor(s):  Are these physically two different sensors
  or are the measurements from one physical sensor sent to both side A
  and B of the TIB?

- MRI CCD A & B sensor(s):  Are these physically two different sensors
  or are the measurements from one physical sensor sent to both side A
  and B of the TIB?

- HRI TEL A & B sensor(s):  Are these physically two different sensors
  or are the measurements from one physical sensor sent to both side A
  and B of the TIB?

- Is the HRI SIM Prism 1 sensor for the CaF2 prism?

- Is the HRI SIM Prism 2 sensor for the ZnSe prism?

- Which panels are solar wings 1 and wing 2?  Looking directly at
  the instrument platform with up in the direction of the HGA and
  down looking out the ITS instrument, is the wing on the left or
  right called wing 1 for these temperatures?

- Which directions are +/-Z in the definitions for the four solar
  wing temps?   Does +Z point to the sun or the target (generally),
  assuming Z is normal to the flat panels.

- Was the sensor for the beamsplitter attached to TIB side A or B?
  One spreadsheet I have, ?, states A but the DI Thermal Control
  Subsystem Description report (DI-INST-THR-030-REVA) states B.

- Do we know why some of the paired temps, such as MRI CCD A and B
  varied by as much as one deg C during flight?