benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 g220 G220_stmpd_H105_5971, 1992-10-22,   ,   ,  TURBOROGUE,  123 ,   ,  AOAD/M_T,  114,  NONE, 0.7789, 0, 30, 16280
 g220 G220_stmpd_H105_5971, 1992-10-23,   ,   ,  TURBOROGUE,  123 ,   ,  AOAD/M_T,  114,  NONE, 0.7789, 0, 30, 0
 g220, 1996-09-30,  WRT ,  USGS ,  ASHTECH,  *LP00141 ,  Z-XII3 1F00,  ASH700718B,  11416,  NONE, 1.2531, 1.3019, 30, 154130
 g220, 1998-09-27,  CHS ,  USGS ,  ASHTECH,  LP03362 ,  Z-XII3 CB00,  ASH700936E_C,  CR16379,  NONE, 1.2186, 1.2678, 30, 16150
 g220 G220_stmpd_H105_5971, 2002-09-16,  TXN ,  USGS MENLO PARK ,  TRIMBLE,  3616A15404 ,  4000SSI NP,  TRM22020.00+GP,  0080053861,  NONE, 1.2221, 0, 30, 1590
 g220 G220_stmpd_H105_5971, 2002-09-19,  WC ,  USGS MENLO PARK ,  TRIMBLE,  4005A27617 ,  4000SSI NP,  TRM22020.00+GP,  0220051636,  NONE, 1.3014, 0, 30, 155230