PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
START_TIME = 1997-09-12T00:00:00
STOP_TIME = 1999-03-27T23:59:59
DATA_SET_ID = "MGS-M-RSS-5-SDP-V1.0"
INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR"
TARGET_NAME = MARS
^LATEX_DOCUMENT = "AAS99328.TEX"
^PS_DOCUMENT = "AAS99328.PS"
DESCRIPTION = "
This PDS document is a description of the methods used and results
obtained in analyzing radio tracking data from the Mars Global Surveyor
spacecraft while it orbited Mars during selected periods from 1997 to
1999.
The paper was presented to the Astrodynamics Specialist Conference,
Girdwood, Alaska, 16-19 August 1999. Authors: F.G. Lemoine,
D.D. Rowlands, D.E. Smith, D.S. Chinn, D.E. Pavlis, S.B. Luthcke,
G.A. Neumann, and M.T. Zuber. Title: Orbit Determination for Mars
Global Surveyor During Mapping.
The abstract reads:
The Mars Global Surveyor (MGS) spacecraft reached its designated
low-altitude, and near-circular orbit about Mars after termination
of aerobraking on February 4, 1999. The Mars Orbiter Laser Altimeter
(MOLA) returned its first data from this low-altitude orbit on
March 1, 1999. The Doppler data acquired from the Deep Space Network
were used to determine the orbit of the MGS spacecraft, so that the
altimeter data could be used to map the topography of Mars. A
detailed nonconservative force model was implemented for MGS that
included articulation of the solar arrays. The tracking data in
February and March 1999 were used to improve the knowledge of the
Mars geopotential by developing MGM0964C20, a solution to 70x70 in
spherical harmonics. When the improved nonconservative force model
and the improved Mars gravity model, MGM0964C20, are applied in the
MGS orbit determination during the mapping orbit, the overlaps of
adjacent arcs in March 1999 show a consistency of 0.6 m in the radial
direction, and 2 meters in total position. We demonstrate that
altimeter crossovers from MOLA can be used to further improve the
orbit determination for these arcs resulting in an orbit overlap
consistency of 0.3 meters in the radial direction and 1.7 meters in
total position.
The document is presented in two formats: a PostScript file with
figures and a LaTeX file of text only.
LaTeX is a document preparation system developed by Leslie Lamport;
it is a collection of TeX modules. TeX is a document preparation
system developed by Donald Knuth. For further information, see books
such as 'LaTeX Line By Line' by Antoni Diller (John Wiley and Sons,
1993, 291 p.).
'PostScript' is a trademark of Adobe Systems Incorporated."
OBJECT = LATEX_DOCUMENT
DOCUMENT_NAME = "MGS ORBIT DETERMINATION - LATEX FORMAT"
PUBLICATION_DATE = 1999-08-16
DOCUMENT_TOPIC_TYPE = "GRAVITY FIELD DERIVATION"
INTERCHANGE_FORMAT = ASCII
DOCUMENT_FORMAT = TEXT
FILES = 1
DESCRIPTION = "
LaTeX version of a paper describing analysis of radio tracking and
altimetry data from Mars Global Surveyor in 1997-1999. This is a
single file with name AAS99328.TEX containing text only (no figures)
for the paper presented at the Astrodynamics Specialists Conference.
On some systems the characters in the extension will have to
be converted to lower case before the LaTeX software will work.
If the programs latex and dvips are available, the user should type
the following commands:
latex AAS99328
dvips -o AAS99328.ps AAS99328.dvi
lpr AAS99328.ps
Users without these programs should consult a system administrator for
advice on converting the LaTeX files.
The LaTeX file contains an unknown number of variable-length lines of
readable and printable ASCII characters. Lines are delimited by the
ASCII carriage-return (ASCII 13) line-feed (ASCII 10) pair."
END_OBJECT = LATEX_DOCUMENT
OBJECT = PS_DOCUMENT
DOCUMENT_NAME = "MGS ORBIT DETERMINATION - POSTSCRIPT FORMAT"
PUBLICATION_DATE = 1999-08-16
DOCUMENT_TOPIC_TYPE = "GRAVITY FIELD DERIVATION"
INTERCHANGE_FORMAT = BINARY
DOCUMENT_FORMAT = "POSTSCRIPT"
FILES = 1
DESCRIPTION = "
PostScript version of a paper describing analysis of radio tracking and
altimetry data from Mars Global Surveyor in 1997-1999. This is a
single file with name AAS99328.PS containing both text and figures
for the paper presented at the Astrodynamics Specialists Conference.
The PostScript file contains an unknown number of variable-length
lines of readable and printable ASCII characters. Lines are
delimited by the ASCII carriage-return (ASCII 13) line-feed (ASCII 10)
pair. Pagination is from front to back."
END_OBJECT = PS_DOCUMENT
END