Data Set Overview : This data set is intended to include all published groundbased asteroid radar detections through Dec. 31, 2005. These entries were extracted from the compilation of published and unpublished asteroid radar detections maintained by Steven J. Ostro, and selected data have been collected from the published literature by Carol Neese. Scientific questions about this data set should be directed to Steven J. Ostro, JPL, at the email address stro@reason.jpl.nasa.gov. (Effective date for this address: Jan. 10, 2006.)  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 in 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, and these have continued to be added in subsequent updates. Prior to version 10.0, the data set included unpublished detections. Starting with version 10.0, only published detections are included.  Parameters : An entry for each detection reports radar cross-section, circular polarization ratio and radar albedo, if known, error values for these parameters, year of observation, and the reference in which the observations were reported.  Ancillary Data : The references 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.  Data Coverage and Quality : This data set is intended to include all published groundbased radar detections of asteroids. It is complete through December 31, 2005. If an item of data is missing from the table (appearing as a null value such as 9.99), this indicates that the data item is not available from the published paper. For example, for monostatic radar observations, circular polarization ratio cannot be derived, so it is left blank. 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.