Data Set Overview
  =================
    This data set is intended to include all groundbased asteroid radar
    detections.  These entries were collected by Steven J. Ostro (1989)
    [OSTRO1989] and selected data have been provided as collected from the
    published literature. A null value (e.g., '9.99') in any particular
    column indicates that the corresponding datum was not available in the
    published paper.  For example, for monostatic radar observations,
    circular polarization ratio cannot be derived, so the value in this
    column is '9.99'.  In some cases, the data provided in the paper are
    too complex to be presented in the table, as in the case of a
    time-series of values. In case of questions, the original papers
    should be consulted. Scientific questions about this data set should
    be directed to Steven J. Ostro, JPL, at the email address
    'ostro@echo.jpl.nasa.gov' (effective March 23, 1998).
 
 
  Modification History
  ====================
    The radar data set was first introduced into PDS at the April 1994
    asteroid data sets review and has been updated yearly since that
    time.  Updates consist of adding entries for asteroid radar detections
    made since the previous update and adding full data for detections
    which have been published since the last update.  The 1997 update
    added radar albedos.
 
 
  Parameters
  ==========
    An entry for each detection reports radar cross-section, circular
    polarization and radar albedo, if known, error values for these
    parameters, year of observation, and the reference in which the
    observations were reported.
 
 
  Processing
  ==========
    No processing has been performed on these data beyond that reported in
    the published papers from which the data were drawn.
 
 
  Data
  ====
    This data set comprises a single data table, 'radar.tab', tabulating
    the parameters listed above.
 
 
  Ancillary Data
  ==============
    The full citations of the papers in which the asteroid radar
    detections were reported are compiled in the file 'radarref.tab'.

Confidence Level Overview
  =========================
    The confidence level of each data value reported is reflected in the
    uncertainty value in the same entry.  Further information about the
    observations can be obtained by consulting the original reference for
    each entry.
 
 
  Review
  ======
    This data set underwent formal external review on March 23, 1998.
 
 
  Data Coverage and Quality
  =========================
    This data set is intended to include all groundbased radar detections
    of asteroids.  It is complete through January 1998.
 
 
  Limitations
  ===========
    This data set is intended to collect the data reported in the
    published literature, as well as to record the existence of
    unpublished asteroid radar detections.