Deep Impact General:
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 o In deep_impact.cat, "approach sun angle" should be "phase angle on approach".

 o Add note to the data set catalog descriptions for raw data regarding the
   large number of "UNK" values for, e.g., geometry information in the raw 
   file labels.

 o In dataset.html pages, expand acronyms in the titles

 o See if there's some way to either document or mitigate the fact that the
   DI data/ directory trees from different data sets look identical in their
   tar files.

 o In the dataset.cat files for the reduced data, verify that there is a 
   clear statement that the data are not cleaned.

 o Add note to dataset.cat and instrument catalog files about dropout of
   1/3 of a line because of frame transfer.

 o Day of year directory should be determined identically in corresponding
   raw and reduced data sets (currently, one is day of downlink and the
   other is day of observation).

 o Nick Mastrodemus' email in personnel.cat is not correct.