PDS_VERSION_ID                   = PDS3
RECORD_TYPE                      = STREAM

OBJECT                           = DATA_SET
DATA_SET_ID                      = "LP-L-6-EPHEMERIS-V1.0"

OBJECT                           = DATA_SET_INFORMATION
DATA_SET_NAME                    = "LP MOON SPACECRAFT EPHEMERIS V1.0"
START_TIME                       = 1998-01-05
STOP_TIME                        = UNK
DATA_OBJECT_TYPE                 = "FILE"
DATA_SET_RELEASE_DATE            = 1998-06-01
PRODUCER_FULL_NAME               = "ALAN B. BINDER"
DETAILED_CATALOG_FLAG            = "N"
DATA_SET_COLLECTION_MEMBER_FLG   = "N"
DATA_SET_DESC                    = "

Data Set Overview
=================
 
The Lunar Prospector ephemeris data set consists of spacecraft
position and velocity determinations as a function of time in
Moon-centered, Earth equator, mean of J2000 coordinates.  Tracking
data collected by ground stations are used by the Goddard Flight
Dynamics Analysis Branch (FDAB) to compute the Lunar Prospector orbit
ephemeris.  The Level 0 Data archive contains the ephemeris type known
as the 'definitive ephemeris', which is based on an updated lunar
gravity model [FDAB1997].

Each file in the ephemeris data set covers approximately 24 hours.
 
Science Objectives 
================== 

The Lunar Prospector science objectives relevant to this data set are
to map the Moon's surface composition and its magnetic field, and to
determine the frequency and location of gas release events.  A special
emphasis of the science objectives is to search for polar water ice
deposits [BINDERETAL1998].  The spacecraft ephemeris data are used to
locate where on the Moon science data were acquired.  "
 
 CONFIDENCE_LEVEL_NOTE           = "
 
Confidence Level Overview
=========================

The Lunar Prospector definitive orbit ephemeris files, processed with
the updated lunar gravity model, are accurate to within +/- 1 km in
position and +/- 1 m/sec in velocity [FDAB1997].

Data Coverage and Quality
=========================

Ephemeris data exist for the entire Lunar Prospector Primary Mission.  "
 
END_OBJECT                       = DATA_SET_INFORMATION
 
 OBJECT                           = DATA_SET_TARGET
 TARGET_NAME                      = MOON
 END_OBJECT                       = DATA_SET_TARGET
 
 OBJECT                           = DATA_SET_HOST
 INSTRUMENT_HOST_ID               = LP
 INSTRUMENT_ID                    = ENG
 END_OBJECT                       = DATA_SET_HOST
  
 OBJECT                           = DATA_SET_REFERENCE_INFORMATION
 REFERENCE_KEY_ID                 = "BINDERETAL1998"
 END_OBJECT                       = DATA_SET_REFERENCE_INFORMATION

 OBJECT                           = DATA_SET_REFERENCE_INFORMATION
 REFERENCE_KEY_ID                 = "FDAB1997"
 END_OBJECT                       = DATA_SET_REFERENCE_INFORMATION
  
END_OBJECT                        = DATA_SET
END