benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 c280 C280_stmpd_BENCHMARK, 1992-10-09,   ,   ,  TURBOROGUE,  111 ,   ,  AOAD/M_T,  111,  NONE, 1.2218, 0, 30, 15230
 c280, 1992-10-10,   ,   ,  TURBOROGUE,  111 ,   ,  AOAD/M_T,  111,  NONE, 1.2218, 0, 30, 0
 c280 C280_stmpd_BENCHMARK, 1992-10-12,   ,   ,  TURBOROGUE,  133 ,   ,  AOAD/M_T,  133,  NONE, 1.4076, 0, 30, 15110
 c280 C280_stmpd_BENCHMARK, 1992-10-13,   ,   ,  TURBOROGUE,  133 ,   ,  AOAD/M_T,  133,  NONE, 1.4076, 0, 30, 0
 c280, 1996-09-21,  JMS ,  USGS ,  ASHTECH,  345 ,  Z-XII3 1G00,  unknown,  *177,  NONE, 1.2795, 0, 30, 165230
 c280, 1996-09-22,  JMS ,  USGS ,  ASHTECH,  345 ,  Z-XII3 1G00,  unknown,  *177,  NONE, 1.0358, 0, 30, 151330
 c280, 1998-09-19,  JMS ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 CB00,  ASH700936E_C,  CR16116,  NONE, 1.5738, 1.6199, 30, 1750
 c280, 1998-09-20,  JMS ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 CB00,  ASH700936E_C,  CR16116,  NONE, 1.2459, 1.2948, 30, 15560
 c280 C280_stmpd_BENCHMARK, 2002-09-11,  TXN ,  USGS MENLO PARK ,  TRIMBLE,  3616A15404 ,  4000SSI NP,  TRM22020.00+GP,  0080053861,  NONE, 1.3375, 0, 30, 154330
 c280 C280_stmpd_BENCHMARK, 2002-09-20,  MCN ,  USGS ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.3864, 1.4339, 30, 155430