NEAR Data Problems

This page describes known and discovered problems with the final NEAR deliveries as of June 11, 2003.

MSI - Multi-Spectral Imager Data   (Volume names beginning with "NI")

Level 1B

• VOLDESC.CAT does contain all DATA_SET_IDs on the disk but the catalog file msifilds.cat, does describe CALIB/BANDPASS files only for level 2 CAL MSI data.

Level 2

• The DATA_SET_ID in the top-level CALIB files may not be correct.

• There is no TARGET_NAME in the CALIB file labels.

• VOLDESC.CAT does not contain all the DSIDs on the volume.

• In the DOCUMENT directory, the MSIDEFINITIONS.TXT file has both an attached and a detached label.

• The required volume index files do not have the correct name.

Level 3

• VOLDESC.CAT has too many DSIDs - more than on the actual volume..

• Required index files have the wrong names.

• NOTE: The BROWSE directory contains junk files apparently left over from data preparation.

NLR - Laser Ranger Finder Data   (Volume names beginning with "NL")

Level 1B

• The NLCOLL_1001/AAREADME.TXT file was apparently cloned from MSI. It contains several references to the MSI collection and the volume directory structures look like MSI's.

Levels 2 and 3

• The NLCOLL_3001/AAREADME.TXT file was apparently cloned from MSI. It contains several references to the MSI collection and the volume directory structures look like MSI's.

• NOTE: Level 2 and 3 data are contained on the same physical volumes. The data reside in high-level directories called /level2/ and /level3/ instead of the PDS standard /data/ directory.

NIS - Infrared Spectrometer Data   (Volume names beginning with "NN")

Level 1B

No known problems in the data files.

Levels 2 and 3

• No known problems in the data files.

• NOTE: Labels contain non-SI values in some of the UNIT fields (for example, "MILLIAMPERE", "DEGREE CELSIUS").

• NOTE: Duration times are misleading. Duration includes data spectra, instrument rest, and dark spectra (if darks were interleaved). PDS-SBN calculated the exposure time for data spectra only and added it to new Level 2 data products on the NXCOLL_3001 CD: /NNEROS_2003, the revised NIXEL database, /NNEROS_2004, the NIXEL data split by UTC, and /NNEROS_2005, the NIXEL data split by mission subphase.

MAG - Magnetometer Data   (Volume names beginning with "NM")

Level 1B

No known problems in the data files.

Level 2
• Data set catalog file "magl2ds.cat" on each of the mission phase volumes on /NMCOLL_3001/ contain a typo in a REFERENCE_KEY_ID value: "ANDERSONETAL2001" is erroneously spelled "ANDERS0NETAL2001" (i.e., with a zero rather than an 'O' in the author's name).

XRS/GRS - X-Ray/Gamma-Ray Spectrometer Data   (Volume names beginning with "NX")

Levels 1B, 2, and 3

No known problems in the data files.

Radio Science Data   (Volume names beginning with "NR")

Levels 1B through 5
No known problems in the data files.

SPICE Data   (Volume names beginning with "NG")

• The text instrument kernel for NLR, /DATA/IK/NLR04.TI, has PC line terminators of carriage returns and linefeeds. It should have Unix line terminators of linefeeds only. This kernel will only work under a PC environment. PDS-SBN archives SPICE kernel data files to be used under a UNIX environment. See the NEAR SPICE aareadme file.