benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 c2r3, 2001-06-05,  JMS ,   ,  ASHTECH,  LP00108.707 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993706,  NONE, 1.0636, 1.1148, 30, 1750
 c2r3, 2001-06-06,  CHS ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2833, 1.3318, 30, 151430
 c2r3 Caruthers2No3_1961_U, 2003-05-14,  GDH ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH701945E_M,  CR620022605,  NONE, 1.1934, 1.2428, 30, 153130
 c2r3 Caruthers2No3_1961_U, 2014-01-11,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993703,  NONE, 1.1995, 1.2489, 15, 154145
 c2r3 Caruthers2No3_1961_U, 2014-01-23,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14244,  NONE, 1.0708, 1.1218, 15, 15615