benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 a270 A270_stmpd_D200_rese, 1992-10-06,   ,   ,  TURBOROGUE,  118 ,   ,  AOAD/M_T,  111,  NONE, 0.9927, 0, 30, 15300
 a270, 1996-09-18,  NK ,  USGS ,  ASHTECH,  274 ,  Z-XII3 1E86,  ASH700228D,  1058,  NONE, 1.2513, 1.3001, 30, 15360
 a270, 1998-09-16,  CWW ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 CB00,  ASH700936E_C,  CR16381,  NONE, 1.255, 1.3038, 30, 15380
 a270 A270_stmpd_D200_rese, 2002-09-09,  BW ,  USGS MENLO PARK ,  TRIMBLE,  3335A03898 ,  4000SSE NP,  TRM22020.00+GP,  0220126940,  NONE, 1.2226, 0, 30, 16830
 a270 A270_stmpd_D200_rese, 2002-09-21,  AM ,  USGS MENLO PARK ,  TRIMBLE,  3615A15262 ,  4000SSI NP,  TRM22020.00+GP,  0220051874,  NONE, 1.2693, 0, 30, 154530