PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 80 OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2001-02-16 NOTE = "N/A" END_OBJECT = TEXT END Voyager Radio Science Archive Saturn Open-Loop Raw Data (VG2-S-RSS-1-ROCC-V1.0) ERRATA.TXT R.A. Simpson Stanford University ============================================================================== INTRODUCTION ============================================================================== This file contains an accumulation of corrections and notes for the Voyager 2 Saturn Radio Science Open-Loop (Occultation) Raw Data Set. ============================================================================== CORRECTIONS AND NOTES ============================================================================== ALLVOLS Labels for files in the BROWSE directory state that the lower right panel is an extract of the first few lines of the source ODR PDS label. In fact, it is the complete ODR PDS label. Users of Adobe Illustrator may encounter problems displaying files in the BROWSE directory. Cause of the problem is not known, but it appears to be connected with the manner in which the four original figures were combined into a single PostScript file. By hand editing the four-panel PostScript files, one user was able to extract the individual figures and successfully display those using Illustrator. Other methods of looking at the BROWSE files (such as ghostview or sending the files to a PostScript printer) have worked successfully for a number of other users. BODIES_TABLE in GEOMETRY/CRS32_1A.CRS is filled with values equal to 0. Although one might have hoped for better, this is how the file was provided to science teams by the Voyager Project. VG_2343 PREPPOWER plot was not generated in BROWSE/C3SL01AA.PS1; instead, two copies of the PREPLOOK plot are shown. Reason for this error is not known; but often it occurs when the volume of data to be plotted is overestimated and the program runs into an end-of-file before generating the plot. The overestimation can result from loss of data between the first and last time tags. VG_2348 At least one record was lost due to deterioration of the original C5XL16 magnetic tape. ODR/C5XL16AA.ODR and ODR/C5XL16BB.ODR are the two file 'fragments' of good data that were recovered. C5XL16AA.ODR contains about 23 seconds of data; C5XL16BB.ODR contains about 75 seconds. VG_2350 Data from original tape C5SR09 are fragmented into five files (C5SR09AA.ODR through C5SR09EE.ODR) with a single 5056-byte record lost between each pair of files. Users should substitute data from C4SR10 on volume VG_2362. No plots were generated in BROWSE/C5SR09BB.PS1 or BROWSE/C5SR09CC.PS1; no PREPLOOK plots were generated in BROWSE/C5SR09DD.PS1 and BROWSE/C9SR09EE.PS1. Data from C5XR30 ended unexpectedly at 07:09:41 rather than continuing to 07:10:00. The reason for the anomaly is not known; the remaining 19 seconds of data have been lost. There was no corresponding data from Recorder B. VG_2353 PREPPOWER plot was not generated in BROWSE/C0SR01AA.PS (see VG_2343) VG_2355 The following tapes/files could not be located when the archive was constructed. Users should substitute data from VG_2343 as indicated: VG_2355 VG_2343 Start Time Missing Data Equivalent Data ---------- ------------ --------------- 05:13:20 C2XR15 C3XR03 05:15:00 C2XR16 C3XR04 05:16:40 C2XR17 C3XR05 05:18:20 C2XR18 C3XR06 PREPPOWER plot was not generated in BROWSE/C2SR02AA.PS (see VG_2343) PREPPOWER plot was not generated in BROWSE/C2SR03AA.PS (see VG_2343) VG_2356 The following tapes/files could not be located when the archive was constructed. Users should substitute data from VG_2344 as indicated: VG_2356 VG_2344 Start Time Missing Data Equivalent Data ---------- ------------ --------------- 05:20:00 C2XR19 C3XR07 05:21:40 C2XR20 C3XR08 05:25:00 C2XR22 C3XR10 05:26:40 C2XR23 C3XR11 05:33:20 C2XR27 C3XR15 05:35:00 C2XR28 C3XR16 05:36:40 C2XR29 C3XR17 Data from original tape C2SL02 are fragmented into two files (C2SL02AA.ODR and C2SL02BB.ODR) with a single 5056-byte record lost between them. Users should substitute data from C3SL02 on volume VG_2344. PREPPOWER plot was not generated in BROWSE/C2SR10AA.PS (see VG_2343) VG_2357 PREPPOWER plot was not generated in BROWSE/C4SR01AA.PS (see VG_2343) VG_2358 Data from original tape C4SR03 are fragmented into two files (C4SR03AA.ODR and C4SR03BB.ODR) with a single 5056-byte record lost between them. Users should substitute data from C5SR02 on volume VG_2346. VG_2361 Data from original tape C4XL28 are fragmented into four files (C4XL28AA.ODR through C4XL28DD.ODR) with a single 5056-byte record lost between each pair. Users should substitute data from C5XL25 on volume VG_2350. The PREPLOOK and PREPPOWER plots were not generated in BROWSE/C4XL28BB.PS1 or BROWSE/C4XL28CC.PS1. In both cases, the data volume in the file was less than one second. PREPPOWER plot was not generated in BROWSE/C4SL10AA.PS (see VG_2343) PREPPOWER plot was not generated in BROWSE/C4SR10AA.PS (see VG_2343) VG_2362 Data from original tape C6XR14 are fragmented into two files (C6XR14AA.ODR and C6XR14BB.ODR) with a single 5056-byte record lost between each pair. Users should substitute data from C7XR11 on volume VG_2351. VG_2363 X-band calibration data on these volumes may be of limited value. thru It appears that the X-band signals on both RCP and LCP were VG_2368 being clipped at or before the analog-to-digital conversion. Histograms of sample values show sample values only between about 70 and 180 (the possible range is 0 to 255); power spectra show sidebands around the carrier. The data acquired later (from Saturn) do NOT show such artifacts, so a simple conclusion is that the calibration was not executed correctly whereas the Saturn observations are OK. VG_2363 PREPPOWER plot was not generated in BROWSE/C8SL01AA.PS (see VG_2343) VG_2364 Record 3557 in original file C8XR10 had only 805 bytes. This record was removed. The remaining data have been split into files C8XR10AA.ODR and C8XR10BB.ODR; labels for each were constructed by hand. C8SL04 is missing from the sequence; there is no record, however, that such a tape was ever created, so there is no corresponding file in the archive. Users needing coverage of this test time should use C9SL04AA.ODR. VG_2369 The following files in the DOCUMENT directory should be considered placeholders. Real figures were never incorporated into the document: OP2SF202.PS OP2SF503.PS OP2SF505.PS