benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 01ck CA_HPGN_DENSIFICATIO, 2007-08-19,  GDH ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 1.5507, 1.5969, 30, 1740
 01ck CA_HPGN_DENSIFICATIO, 2007-08-22,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.7504, 0.8078, 30, 1650
 01ck CA_HPGN_DENSIFICATIO, 2009-02-18,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.9692, 1.0219, 30, 16315
 01ck CA_HPGN_DENSIFICATIO, 2009-02-19,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 0.9804, 1.0329, 30, 163130
 01ck CA_HPGN_DENSIFICATIO, 2011-05-10,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 1.0516, 1.1029, 15, 1680
 01ck CA_HPGN_DENSIFICATIO, 2011-05-11,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.9987, 1.0509, 15, 152815
 01ck CA_HPGN_DENSIFICATIO, 2015-06-24,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 1.3965, 1.4439, 15, 145415
 01ck CA_HPGN_DENSIFICATIO, 2015-06-25,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 1.3965, 1.4439, 15, 0