benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 g250 G250_stmpd_3214S_USG, 1992-10-21,   ,   ,  TURBOROGUE,  122 ,   ,  AOAD/M_T,  118,  NONE, 1.0597, 0, 30, 151730
 g250 G250_stmpd_3214S_USG, 1992-10-22,   ,   ,  TURBOROGUE,  122 ,   ,  AOAD/M_T,  118,  NONE, 0.9038, 0, 30, 153030
 g250 G250_stmpd_3214S_USG, 1992-10-23,   ,   ,  TURBOROGUE,  122 ,   ,  AOAD/M_T,  118,  NONE, 0.9038, 0, 30, 0
 g250, 1996-09-29,  NK ,  USGS ,  ASHTECH,  274 ,  Z-XII3 1E86,  ASH700228D,  1058,  NONE, 1.2624, 1.3111, 30, 15570
 g250, 1996-09-30,  NK ,  USGS ,  ASHTECH,  274 ,  Z-XII3 1E86,  ASH700228D,  1058,  NONE, 1.2714, 1.32, 30, 155230
 g250, 1998-09-27,  CAF ,  USGS ,  ASHTECH,  LP03464 ,  Z-XII3 CB00,  ASH700936E_C,  CR16364,  NONE, 1.2257, 1.2748, 30, 15460
 g250, 1998-09-28,  CAF ,  USGS ,  ASHTECH,  LP03464 ,  Z-XII3 CB00,  ASH700936E_C,  CR16364,  NONE, 1.1447, 1.1947, 30, 145530
 g250 G250_stmpd_3214S_USG, 2002-09-16,  WC ,  USGS MENLO PARK ,  TRIMBLE,  3337A03970 ,  4000SSE NP,  TRM22020.00+GP,  0220051878,  NONE, 1.4208, 0, 30, 16550
 g250 G250_stmpd_3214S_USG, 2002-09-18,  AM ,  USGS MENLO PARK ,  TRIMBLE,  3615A15262 ,  4000SSI NP,  TRM22020.00+GP,  0220051874,  NONE, 1.3726, 0, 30, 154330