PDS_VERSION_ID         = PDS3
RECORD_TYPE            = STREAM
OBJECT                 = TEXT
  PUBLICATION_DATE     = 2016-12-19
  INTERCHANGE_FORMAT   = ASCII
  NOTE                 = "Errata for the Mars Exploration Rover 2
                          Operations Mosaics."
END_OBJECT             = TEXT
END


This document describes errors concerning the MER2 Operations Mosaics image 
archive. Please keep checking back for updates as it is currently under
construction.


1. Missing keywords from header in PDS label

The following mosaics have key camera model and projection data keywords 
missing from the header in the PDS label. However, the VICAR label is fine.

mera navcam site0089 2nn297sel89cylaip1807l000m2.img 
mera navcam site0089 2nn298sel89cylaip1665l000m3.img 
mera navcam site0089 2nn298sel89vrtaip1665l000m3.img 
mera navcam site0091 2nn310sel91cyl00p0645l000m3.img 
mera navcam site0091 2nn310sel91vrt00p0645l000m3.img 
mera navcam site0091 2nn311sel91cylc4p0625l000m3.img 
mera pancam site0023 2pp087ilf23cyl00p2367l777m2.img 


2. START_AZIMUTH and STOP_AZIMUTH

The values for START_AZIMUTH and STOP_AZIMUTH are not always correct in 
describing the azimuth range of the mosaic for data acquired before Sol 700, 
for both the PDS and VICAR labels. Alternatively, the LEFTAZ and RIGHTAZ 
keyword values in the VICAR label should be used.


3. PRODUCT_ID and FILENAME mismatch

Mosaics in the archive consist of both "machine generated" and "analyst 
generated" products.  In the early days, the process for filename versioning 
and PRODUCT_ID versioning to distinguish between the "machine" and "analyst" 
generated products wasn't always consistent. When OPGS reprocessed the 
archive mosaics, this mismatch was corrected.  However, mosaics for sols 
<1,000 were not reprocessed, thus a handful of filename/PRODUCT_ID mismatches 
still exist in the archive.


4. Possible error in .LIS files

Some .LIS files have possibly obsoleted entries for the source products and 
therefore should not be considered reliable. As these files are not required
archive products, there will be little to no attempt to correct them due to 
limited resources.

5. Dark browse images

Some browse images within the EXTRAS sub-drectory may be too dark. This could
be due to an older version of the software that produces the JPGs.

6. Product size smaller than label indicates

Some mosaics from Sols 1801-2610 are smaller than the label indicates. When 
the mosaics were renamed, to remove the # character, they appear to have been 
truncated in the process of file name changing.

7. Incorrect file names

The following mosaic products are incorrecly named:

2NN515ILFABCYPP0P0715L000M2 - should be site AB (111) pos 70
->  2NN515ILFABCYP70P0715L000M2
2NN515ILFABCYPP0P0715R000M2 - should be site AB (111) pos 70 
->  2NN515ILFABCYP70P0715R000M2
2NN740ILFAMCYL08P0715L000M2 - should be site AN pos o8 (letter o, not zero)
->  2NN740ILFANCYLO8P0715L000M2
2NN740ILFAMCYP08P0715L000M2 - should be site AN pos o8 (letter o, not zero)
->  2NN740ILFANCYPO8P0715L000M2
2NN740ILFAMCYP08P0715R000M2 - should be site AN pos o8 (letter o, not zero)
->  2NN740ILFANCYPO8P0715R000M2
2NN740ILFAMPOL08P0715L000M2 - should be site AN pos o8 (letter o, not zero)
->  2NN740ILFANPOLO8P0715L000M2
2NN740ILFAMVRT08P0715L000M2 - should be site AN pos o8 (letter o, not zero)
->  2NN740ILFANVRTO8P0715L000M2
2PP777ILFAPCYLFGB2383L222M2 - should be pos GB seq P2383
->  2PP777ILFAPCYLGBP2383L222M2

8. Missing headers
 
The following mosaic products are missing headers:

mera navcam site0089 2nn297sel89cylaip1807l000m2.img
mera navcam site0089 2nn298sel89cylaip1665l000m3.img
mera navcam site0089 2nn298sel89vrtaip1665l000m3.img
mera navcam site0091 2nn310sel91cyl00p0645l000m3.img
mera navcam site0091 2nn310sel91vrt00p0645l000m3.img
mera navcam site0091 2nn311sel91cylc4p0625l000m3.img
mera pancam site0023 2pp087ilf23cyl00p2367l777m2.img

9. Sol numbers above 999

For MER mosaics after sol 999, the sol number is forced into the three 
digits allocated in the filename using a three digit alphanumeric. 
Unfortunately, the same three digit value is assigned to PLANET_DAY_NUMBER 
in the label, so what should be an integer value is not always one.

Example: mosaic 2MMD60ILFAWPER00P2936M222M2 has PLANET_DAY_NUMBER = D60.


10. Octothorpes in filename related fields

Products with filenames containng underscores, "_", were originally created 
with octothorpes, "#", but as the octothorpe is not a valid PDS character 
within a filename, they were changed to underscores instead. 
This correction, however, did not carry through to filename related fields, 
e.g. PRODUCT_ID, within the attached PDS label. Hence, the filename of the
file will not match the filename within the label in these cases.