PDS_VERSION_ID = PDS3
DATA_SET_ID = "LP-L-ENG-6-COMMAND-V1.0"
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2013-01-28
NOTE = "ERRATA.TXT reflects any known deficiencies
with files contained on this volume."
END_OBJECT = TEXT
END
Users are encouraged to provide comments back to the PPI Node of the PDS
if errors or omissions are found either in data or in documentation.
Please send comments by e-mail or U.S. mail to the PPI Node PDS Operator:
Email pds_operator@igpp.ucla.edu
Telephone (310) 206-6073
U.S. Mail PDS Operator
c/o Dr. Raymond Walker
3845 Slichter Hall
UCLA - IGPP
Los Angeles, CA 90095-1567
ERRATA
This file contains a list of all deficiencies and irregularities that are
known to exist at the time of production of this volume.
DATA\COMMAND\1998\152_181JUN\C9817516.TAB is missing the
"DSN_STATION_NUMBER".
Non-standard practices
The PDS standards do not specify where to store the required MD5
checksum file for a volume. We have placed it in the root directory of
the volume with the file name "CHECKSUMS.TXT". This may be considered
invalid by some verifiers.
===========================================================================
This dataset was originally part of a CD volume set containging several
different Lunar Prospector datasets across several volumes. The following
is the original errata for that volume set:
This document contains the original errata for the Lunar
Prospector Level 0 data, together with some new comments added later.
The PDS originally released the Level 0 data on a set of 19 CDs
named LP_0001 through LP_0019. In the original release, the errata
were sorted by CD volume and included errata for all the Level 0
data sets. The Lunar Prospector data have since been divided into
separate volumes with one data set per volume.
To simplify the presentation and to keep the errata organized,
we have left the errata in their original arrangement. Therefore, the
errata list still mentions CD volumes, and comments are grouped
according to CD volume. Since the original CDs contained multiple
data sets, the list below may refer to files not on the present volume.
COMMENTS ON LUNAR PROSPECTOR LEVEL 0 DATA
The listing below contains a cumulative set of comments and errors
concerning the Lunar Prospector Level 0 data archive.
I. General comments
1. The PDS standards do not specify where to store the required MD5
checksum file for a volume. We have placed it in the root directory
of the volume with the file name "CHECKSUMS.TXT". This may be considered
invalid by some verifiers.
2. Merged telemetry files
In most cases, the first record of a merged telemetry file is the
same as the last record of the previous file. There are, however,
cases where there are time gaps between two merged telemetry files
and, thus, no overlapping records. There are also a few cases where
two files do not have these overlapping records.
3. PDS catalog objects
The catalog objects on this volume for the five science
instruments are somewhat brief. This is because at the time that the
volume was released, published papers about the instruments were not
available. When the Lunar Prospector Science Teams publish instrument
papers, the catalog objects will be revised and expanded. The revised
catalog objects will be included on later volumes.
Several of the Lunar Prospector catalog object files have been
updated for Level 0 volume LP_0013 to include information about
significant events in the Primary and Extended Missions. The revised
catalog files include the mission, spacecraft, and data set files.
Several of the Lunar Prospector catalog object files have been
updated again for Level 0 volume LP_0019 to include information about
significant events for the complete Primary and Extended Missions.
The revised catalog files include the mission and data set files.
4. Uplink command files
Occasionally a given command is listed twice by the software that
generates the command files. This can be detected because the two
commands are identical (same command and same transmit time).
However, these duplicate commands were only transmitted once to the
spacecraft.
5. Spacecraft clock
The LP spacecraft clock or frame counter increments once every 2
seconds. It is stored in a 24-bit register. This means that the
clock will reset to zero after about 33.5 million seconds or about one
year. The LP spacecraft clock reset on January 30, 1999 at about
12:09 UTC, which was early in the Extended Mission. Level 0 data
files containing the reset clock counter are found on volumes LP_0013
and above.
II. Comments on volume LP_0001
1. ATTITUDE.TAB file on volume LP_0001
Attitude determinations from 1/7/98 through 1/15/98 are based on
Sun sensor data only. Determinations starting on 1/16/98 are based on
a combination of Sun sensor data, Earth-Moon limb sensor data, and the
definitive ephemeris.
2. Uplink command files on volume LP_0001
In command file C9802342.TAB on volume LP_0001, the MERHTROFF
command transmitted at 1998-01-23T00:49:53 did not execute on the
spacecraft because the command format was incorrect due to a
configuration error in the command system at the Mission Control
Center.
III. Comments on volume LP_0003
1. ATTITUDE.TAB file on volume LP_0003
Attitude determinations from 3/1/98 through 3/3/98 are based on a
combination of Sun sensor and Earth-Moon limb sensor data.
Determinations from 3/4/98 through 3/31/98 are based only on Sun
sensor data due to poor Earth-Moon limb sensor geometry
2. File names for sun pulse and merged telemetry files on volume
LP_0003
PDS file names for the sun pulse and merged telemetry files are
based on the date and hour for the start of the file. On volume
LP_0003 there was two sun pulse and merged telemetry files that began
in the same hour (hour 19 of 3/20/98). To avoid having files with the
same name, the start hour used for one set was 19, whereas hour 20 was
used for the second set. The files involved are:
s9807919.b m9807919.b
s9807920.b m9807920.b
IV. Comments on volume LP_0004
1. ATTITUDE.TAB file on volume LP_0004
Attitude determinations from 4/1/98 through 4/12/98 and for
4/16/98 are based only on Sun sensor data due to poor Earth-Moon limb
sensor geometry. Determinations for other times in April 1998 are
based on a combination of Sun sensor and Earth-Moon limb sensor data.
2. Uplink command files on volume LP_0004
The commands listed in file C9811346.TAB did not reach the
spacecraft due to a configuration error in the command system.
V. Comments on volume LP_0005
1. ATTITUDE.TAB file on volume LP_0005
Attitude determinations from 5/3/98 through 4/9/98 are based only
on Sun sensor data because of Earth interference with the Earth-Moon
limb sensor. Also determinations for 5/31/98 are based only on Sun
sensor data due to poor Earth-Moon limb sensor geometry.
Determinations for other times in May 1998 are based on a combination
of Sun sensor and Earth-Moon limb sensor data.
2. Revised format for MAG/ER data starting with volume LP_0005
On May 14, 1998, commands were sent to the Lunar Prospector
spacecraft to reprogram onboard data processing and formatting in the
MAG/ER instrument. The new data format is described in the
MAGERFMT.PDF file found in the DOCUMENT directory. This file is a
revision of Appendix G (LP MAG/ER Telemetry Format) of the Level 0
Data Product SIS document found in the LVL0SIS.PDF file.
VI. Comments on volume LP_0006
1. ATTITUDE.TAB file on volume LP_0006
Attitude determinations from 6/1/98 through 6/30/98 are based
only on Sun sensor data due to poor Earth-Moon limb sensor geometry.
2. Uplink command file C9815961.TAB on volume LP_0006
In command file C9815961.TAB, the command "GHV1LEV, 206" was
transmitted multiple times due to a command system configuration error
at the mission control center. The command was transmitted three
times incorrectly (and one of those commands is duplicated in the
command file). The command system was reconfigured and the command
transmitted at 20:46:24.7 was accepted by the spacecraft.
VII. Comments on volume LP_0007
1. ATTITUDE.TAB file on volume LP_0007
Attitude determinations from 7/1/98 through 7/31/98 are based
only on Sun sensor data due to poor Earth-Moon limb sensor geometry.
VIII. Comments on volume LP_0008
1. ATTITUDE.TAB file on volume LP_0008
Attitude determinations from 8/1/98 through 8/31/98 are based
only on Sun sensor data due to poor Earth-Moon limb sensor geometry.
2. Sun pulse file s9823322.b
The sun pulse file s9823322.b (and its label) is not included on
volume LP_0008. This file covers the time period of 1998-08-21T22:21
to 1998-08-23T03:12 UTC. The spacecraft was in eclipse during this
time and the spacecraft spin rate solutions are still being analyzed.
This sun pulse file will be included on a later volume.
IX. Comments on volume LP_0009
1. ATTITUDE.TAB file on volume LP_0009
Attitude determinations from 9/1/98 through 9/30/98 are based
only on Sun sensor data.
2. Sun pulse file s9826610.b
The sun pulse file s9826610.b (and its label) is not included on
volume LP_0009. This file covers the time period of 1998-09-23T10:13
to 1998-09-23T16:36 UTC. The spacecraft spin rate solutions are still
being analyzed. This sun pulse file will be included on a later
volume.
3. Uplink command files C9826116.TAB, C9826746.TAB, and
C9827027.TAB
Several command files on volume LP_0009 contain commands that
were not received by the spacecraft. In C9826116.TAB the spacecraft
did not receive the two pairs of XMTON and EXEC commands between
15:05:00 and 15:10:11 because the DSS antenna was not pointing at the
spacecraft. In C9826746.TAB the XMTON and EXEC commands between
06:24:00 and 06:24:02 and 08:22:00 and 08:22:02 were not received by
the spacecraft because of a DSS problem. In C9827027.TAB the
spacecraft did not receive two pairs of XMTON and EXEC commands
between 03:10:00 and 03:15:28 because of an uplink failure at the
station.
X. Comments on volume LP_0010
1. ATTITUDE.TAB file on volume LP_0010
Attitude determinations from 10/1/98 through 10/31/98 are based
only on Sun sensor data.
XI. Comments on volume LP_0011
1. ATTITUDE.TAB file on volume LP_0011
Attitude determinations from 11/1/98 through 11/30/98 are based
only on Sun sensor data.
2. Uplink command files C9830542.TAB, and C9830642.TAB
Two command files on volume LP_0011 contain commands that were
not properly executed by the spacecraft. In C9830542.TAB the first 4
commands between 11:10:17 and 12:00:34 were delayed because of a
command system failure. In C9830642.TAB the six commands between
09:36:00 and 09:55:50 did not work.
XII. Comments on volume LP_0012
1. ATTITUDE.TAB file on volume LP_0012
Attitude determinations from 12/1/98 through 12/31/98 are based
only on Sun sensor data.
XIII. Comments on volume LP_0013
1. ATTITUDE.TAB file on volume LP_0013
Attitude determinations from 1/1/99 through 1/31/99 are based
only on Sun sensor data.
2. Sun pulse file s9902903.b
Sun pulse file s9902903.b (and its label) is not included on
volume LP_0013. This file covers the time period of 1999-01-29T03:16
to 1999-01-29T08:51 UTC. The spacecraft was in eclipse during this
time and the spacecraft spin rate solutions are still being analyzed.
This sun pulse file will be included on a later volume.
3. Uplink command file C9903146.TAB
This command file on volume LP_0013 contains two commands that
were not properly received by the spacecraft. The two commands
between 16:53:39 and 16:53:41 did not get into the spacecraft.
XIV. Comments on volume LP_0014
1. ATTITUDE.TAB file on volume LP_0014
Attitude determinations from 2/1/99 through 2/28/99 are based
only on Sun sensor data.
2. Sun pulse file s9905611.b
Sun pulse file s9905611.b (and its label) is not included on
volume LP_0014. This file covers the time period of 1999-02-25T11:37
to 1999-02-25T15:40 UTC. The spacecraft was in eclipse during this
time and the spacecraft spin rate solutions are still being analyzed.
This sun pulse file will be included on a later volume.
XV. Comments on volume LP_0015
1. ATTITUDE.TAB file on volume LP_0015
Attitude determinations from 3/1/99 through 3/31/99 are based
only on Sun sensor data.
2. Missing sun pulse files
The following sun pulse files are not included on volume LP_0015.
s9907708.b
s9907815.b
s9907913.b
s9908015.b
s9908019.b
s9908314.b
s9908318.b
These sun pulse files will be included on a later volume.
3. Uplink command files on volume LP_0015
In command file C9906146.TAB, the spacecraft received only the
last four commands because the DSS had wrong settings. In command
file C9906316.TAB, the spacecraft did not receive the first two
commands. In command file C9908066.TAB, commands three through six
were not received by the spacecraft. In command file C9908916.TAB,
the spacecraft did not accept the command at 1999-03-30T04:36:23.500.
XVI. Comments on volume LP_0016
1. ATTITUDE.TAB file on volume LP_0016
Attitude determinations from 4/1/99 through 4/30/99 are based
only on Sun sensor data.
2. Missing sun pulse files
The following sun pulse files are not included on volume LP_0016.
s9911100.b
s9912019.b
These sun pulse files will be included on a later volume.
XVII. Comments on volume LP_0017
1. ATTITUDE.TAB file on volume LP_0017
Attitude determinations from 5/1/99 through 5/31/99 are based
only on Sun sensor data.
2. Missing sun pulse files
The following sun pulse files are not included on volume LP_0017.
s9912101.b
s9912517.b
These sun pulse files will be included on a later volume.
3. Uplink command files on volume LP_0017
In command file C9914966.TAB, the commands at 21:11:02.000 and
21:14:22.200 were executed on the spacecraft. In command file
C9915066.TAB, the first four commands did not get into the spacecraft.
XVIII. Comments on volume LP_0018
1. ATTITUDE.TAB file on volume LP_0018
Attitude determinations from 6/1/99 through 6/30/99 are based
only on Sun sensor data.
2. Missing sun pulse files
The following sun pulse files are not included on volume LP_0018.
s9915221.b
s9916716.b
These sun pulse files will be included on a later volume.
3. Uplink command file on volume LP_0018
In command file C9918146.TAB, the commands between 14:35:15.000
and 14:37:20.600 were resent to the spacecraft to allow verification
of each command. When these commands were resent between 14:40:22.900
and 14:51:29.000 they were not properly confirmed by the spacecraft.
The sequence of commands were correctly received and confirmed by the
spacecraft when they were sent a third time starting at 14:58:33.800.
XIX. Comments on volume LP_0019
1. ATTITUDE.TAB file on volume LP_0019
Attitude determinations from 7/1/99 through 7/31/99 are based
only on Sun sensor data.
2. Sun pulse files missing from previous volumes
A. Seventeen sun pulse files that were missing from previous
level 0 volumes are included on volume LP_0019 in the directory
SUNPULSE/DXXX. In addition, this directory contains a replacement for
the sun pulse file S9812114.B that is also on volume LP_0005. The
version on volume LP_0019 should be used.
B. Sun pulse data are only valid when the spacecraft spin rate
is less than 15 rpm. During the final phase of the mission in
preparation for the spacecraft impact, the spin rate was increased to
about 24 rpm. Therefore, there are no sun pulse data for this high
spin rate period, which started on 7/29/99 and continued until the end
of mission on 7/31/99.
3. Position file P99212.DAT on volume LP_0019
The height above the surface parameter (HGT) is invalid for times
between 9:21 and 10:10 (end of file) for the position file P99212.DAT.
This is during the final descent to impact into the surface. The HGT
values appear to be relative to a sphere with radius of 1500 km for
this time period as opposed to the nominal lunar radius value of 1738
km.
4. Ephemeris and position files missing from volume LP_0001
Ephemeris and position files for the cruise and orbit insertion
phases of the mission were not on the first level 0 data volume.
These data were recovered and included on volume LP_0019 in the
GEOMETRY directory. Data for most of the cruise and orbit insertion
phases are contained in these extra files. However, there are gaps in
the data around the times of spacecraft maneuvers. In addition, the
time sampling for position file P98009.DAT is once an hour instead of
the normal once a minute sampling.
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