PDS_VERSION_ID                    = PDS3
LABEL_REVISION_NOTE               = "2015-12-15 K. Jha, original"
RECORD_TYPE                       = STREAM
OBJECT                            = DATA_SET
 DATA_SET_ID                      = "LRO-L-LOLA-3-RADR-V1.0"
 OBJECT                           = DATA_SET_INFORMATION
  DATA_SET_NAME                   = "LRO MOON LASER ALTIMETER 3 RADR V1.0"
  DATA_SET_COLLECTION_MEMBER_FLG  = "N"
  DATA_OBJECT_TYPE                = TABLE
  START_TIME                      = 2009-09-15T21:52:46
  STOP_TIME                       = 2010-09-16T19:15:57
  DATA_SET_RELEASE_DATE           = 2015-12-15
  PRODUCER_FULL_NAME              = "DAVID E. SMITH"
  DETAILED_CATALOG_FLAG           = "N"
  DATA_SET_TERSE_DESC             = "Radiometry (albedo) science data 
                                     from the nominal mission phases of the 
                                     2009 Lunar Reconnaissance Orbiter 
                                     mission."
  CITATION_DESC                   = "Smith, D.E., 2009 Lunar Orbiter Laser
                                     Altimeter Radiometry Data Set,
                                     LRO-L-LOLA-3-RADR-V1.0, 
                                     NASA Planetary Data System, 2015."

  ABSTRACT_DESC                   = "
    This data set contains archival radiometric data derived from reduced 
    altimetry measured by the Lunar Orbiter Laser Altimeter instrument 
    during LRO's Nominal Mission.  LOLA is a pulse detection, time-of-flight
    laser altimeter that measures the distance between the LRO spacecraft 
    and the surface of the Moon.

    LOLA transmits a 5-spot pattern, thus providing 5 simultaneous profiles 
    across the lunar surface whose separation depends on spacecraft altitude.
    LOLA also measures the energy of the return pulses, which enables the
    calculation of the surface albedo after calibration."

  DATA_SET_DESC                   = "

  Data Set Overview
  =================
  This data product is presented as along-track profiles that contain normal 
  albedo, the radiance of the Moon at zero phase angle relative to a Lambert 
  surface illuminated normally.  Calculations are done as described in 
  LEMELINETAL2016 using laser data collected during the thirteen Nominal 
  Mission phases.

  Normal albedo has been corrected for the sensitivity drift of the laser 
  with time, and for the loss of signal from temperature-dependent loss of 
  alignment of the laser transmitter in the polar regions. 

  Each TAB file contains data for a given LRO orbit, where each line 
  corresponds to a laser return. The data is stored in 13 columns: latitude 
  (degrees), longitude (degrees), normal albedo, Terrestrial Dynamic Time, 
  laser used, detector used, reflectance (fraction), received energy (zJ), 
  transmit energy (mJ), range (km), solar incidence angle (degrees), Off 
  nadir angle (degrees), dropoff fit (fraction).  These values, as well as
  their locations with each data file, are described in the accompanying
  LOLARADR.FMT file.

  Not every return with valid altimetry has a corresponding albedo value, as
  the energy measurement quality also depends on the solar incidence angle.
  The following conditions were applied to qualify pulses for inclusion in a 
  data file: solar incidence angle lower than 90 degrees (daytime data), 
  received energy greater than 0.14 zJ, a spacecraft off-nadir angle 
  between 0.2 and 0.4 degrees, and an overall range lower than 70 km from 
  the surface.

  The data acquired using Laser 1 and Laser 2 are archived in separate
  directories.  Instabilities in passive Q-switched lasers cause strong 
  variations in the transmitted energy. When normal albedo is calculated 
  using data acquired by Laser 1, these anomalies are removed and yield 
  proper normalization of the data for the transmitted energy variation. 
  However, in the case of Laser 2 data, normalization leaves a residue 
  of several percent positive anomalies near the boundaries of change in 
  out-going laser pulse energy. The transmitted energy collected by LOLA 
  when using Laser 2 may not be a full characterization of the out-going 
  laser pulse energy. The normal albedo calculated using data from Laser 2 
  has substantially higher uncertainty than that using Laser 1.

  Data in the PolarPatch_NP and PolarPatch_SP folders contain normal albedo 
  data acquired by Laser 1 at solar incidence angles greater than 90 
  degrees (nighttime data), which have been used to fill the gaps in 
  coverage near the poles that occur when using day time data only. For the 
  south polar region, we included nighttime data from orbits 4014-4264 
  (used in ZUBERETAL2012) between 85-90 degrees South. For the 
  South polar region, nighttime data from orbits 4014-4264 were included 
  (used in Zuber et al., 2012) between 85-90 degrees South.  For the north 
  polar region, nighttime data from orbits 4850-4971 and orbits 5318-5360 
  were included, between 87-90 degrees North. The nighttime normal albedo 
  data has been scaled to the day time normal albedo from Laser 1 in 
  overlapping regions." 
 
  CONFIDENCE_LEVEL_NOTE           = "TBD"
  
  
 END_OBJECT                       = DATA_SET_INFORMATION

 OBJECT                           = DATA_SET_MISSION
  MISSION_NAME                    = "LUNAR RECONNAISSANCE ORBITER"
 END_OBJECT                       = DATA_SET_MISSION

 OBJECT                           = DATA_SET_TARGET
  TARGET_NAME                     = "MOON"
 END_OBJECT                       = DATA_SET_TARGET

 OBJECT                           = DATA_SET_HOST
  INSTRUMENT_HOST_ID              = LRO
  INSTRUMENT_ID                   = "LOLA"
 END_OBJECT                       = DATA_SET_HOST

 OBJECT                           = DATA_SET_REFERENCE_INFORMATION
  REFERENCE_KEY_ID                = "LEMELINETAL2016"
 END_OBJECT                       = DATA_SET_REFERENCE_INFORMATION

END_OBJECT                        = DATA_SET
END