AAREADME.TXT:

1. Missing PDS_VERSION_ID line at top of label

2. ISO-9660 Level 2 standards are only allowed for directory and file naming.  All other aspects of the volume must follow Level 1.

3. For consistency with other data sets, I would prefer CATALOG file names of the forms MISSION.CAT, INSTHOST.CAT, INST.CAT, REF.CAT, and PERSON.CAT.

4. The description of [DATA]/[TRO] is incorrect; substitute: "Directory of troposphere calibration products"

5. Change the description of [DATA]/[DOCUMENT]/TRK_2_23.TXT to "SIS for media calibration data.

6. I am used to seeing "4800 Oak Grove Drive" included in JPL addresses; but perhaps that is not necessary.

7. The reader would appreciate a slight rewording at the top of this file indicating that this is an archive of RAW data and that no gravity signal from the comet has been detected in the tracking data.  There is such a statement in DATASET.CAT, but browsers will probably go to AAREADME.TXT first.


VOLDESC.CAT

1. RECORD_TYPE keyword missing at top.


CATALOG Directory:

1. The DSN is part of the "instrument host" but it is not mentioned in DIF.CAT.  CATINFO.TXT should note that DIF.CAT includes more than the spacecraft.

2. There are several technical questions/problems in DEEP_IMPACT.CAT; see the Word version in the TYPOS directory for details.


DATA Directory:

1. The EOP/*LBL file points toward DOCUMENT/TRK_2_21.ASC; the actual file name is TRK_2_21.TXT.

2. Similar problems with the ION/*.LBL and TRO/*.LBL pointers


DOCUMENT Directory:

1. The pointers in both *.LBL files point to *.ASC files whereas the files themselves have *.TXT extensions.

2. DOCINFO.TXT says SIS is a System (rather than Software) Interface Specification.  Both *.LBL files have the correct expansion.


INDEX Directory:

1. INDEX.LBL defines 9 columns in INDEX.TAB; but 7 of them are also keywords in the label. The usage appears to be correct; but this may be confusing to users who expect keywords to indicate constant values which would not then appear as columns.

2. Why is START_TIME a column but STOP_TIME is not?


DATA

1. Files are inscrutable, but consistent with what has been archived elsewhere in the discipline.

2. I converted the ODF binary files to ASCII, loaded the two-way Doppler data into Excel, and plotted the values versus time.  There appeared to be no obvious errors; but real use of the data would be facilitated by including (or pointing to) a summary log of spacecraft propulsion and reaction wheel activities (TCM's, DSM's, attitude changes, etc.).  Some of these are mentioned in the CATALOG files, but none of the lists appeared to be complete and none included estimates of the magnitude of the events.