benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 tlla Tilla_1983_USGS, 1998-07-23,  CHS ,  USGS ,  ASHTECH,  175 ,  Z-XII3 1F50,  ASH700936E_C,  CR16365,  NONE, 1.2176, 1.2668, 30, 153730
 tlla Tilla_1983_USGS, 1998-07-24,  DPS ,  USGS ,  ASHTECH,  174 ,  Z-XII3 1F50,  ASH700936E_C,  CR16374,  NONE, 1.2307, 1.2797, 30, 16630
 tlla Tilla_1983_USGS, 1999-07-22,  RBG ,   ,  ASHTECH,  4600 ,  Z-XII3 CC00,  ASH700936D_M,  CR14341,  NONE, 1.1011, 1.1517, 30, 1510
 tlla Tilla_1983_USGS, 1999-07-23,  JMS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992804,  NONE, 1.1498, 1.1998, 30, 154130
 tlla Tilla_1983_USGS, 2002-07-13,  CWA ,  USGS ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.2925, 1.3409, 30, 15520
 tlla Tilla_1983_USGS, 2002-07-14,  AWL ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.1529, 1.2029, 30, 15430