benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 bx46, 1994-06-10,  unknown ,  NGS ,  TRIMBLE 4000SST,  484,  4.81,  TRM14532.00,  18,  NONE, 2.22, 0, 15, 181845
 bx46, 1994-06-20,  unknown ,  NGS ,  TRIMBLE 4000SST,  2790,  4.81,  TRM14532.00,  16,  NONE, 2.22, 0, 15, 174015
 bx46, 1999-05-06,   ,   ,  TRIMBLE 4000SSE,  4883,  7.25,  4000ST,  76723,  L1/L2, 2, 0, 30, 192930
 bx46, 1999-05-07,   ,   ,  TRIMBLE 4000SSE,  4883,  7.25,  4000ST,  76723,  L1/L2, 2, 0, 30, 15200
 bx46, 1999-05-10,   ,   ,  TRIMBLE 4000SSE,  4883,  7.25,  4000ST,  76723,  L1/L2, 2, 0, 30, 191330
 bx46, 1999-05-11,   ,   ,  TRIMBLE 4000SSE,  4883,  7.25,  4000ST,  76723,  L1/L2, 2, 0, 30, 15230
 bx46 BMX46_GPS_1934_1988_, 1992-10-07,   ,   ,  TURBOROGUE,  122 ,   ,  AOAD/M_T,  118,  NONE, 1.1145, 0, 30, 16260
 bx46 BMX46_GPS_1934_1988_, 1992-10-08,   ,   ,  TURBOROGUE,  122 ,   ,  AOAD/M_T,  118,  NONE, 1.1114, 0, 30, 16110
 bx46 BMX46_GPS_1934_1988_, 1994-07-07,  CHS ,  USGS ,  ASHTECH,  762 ,  LM-XII3 7A,  ASH700228A,  0745,  NONE, 1.4403, 1.4874, 30, 1610
 bx46, 1996-09-19,  NK ,  USGS ,  ASHTECH,  274 ,  Z-XII3 1E86,  ASH700228D,  1058,  NONE, 1.1769, 1.2266, 30, 15530
 bx46, 1996-09-20,  NK ,  USGS ,  ASHTECH,  274 ,  Z-XII3 1E86,  ASH700228D,  1058,  NONE, 1.2835, 1.332, 30, 16140
 bx46, 1998-09-17,  CWW ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 CB00,  ASH700936E_C,  CR16381,  NONE, 1.3439, 1.3918, 30, 154630
 bx46, 1998-09-18,  CAF ,  USGS ,  ASHTECH,  LP03464 ,  Z-XII3 CB00,  ASH700936E_C,  CR16364,  NONE, 1.0595, 1.1107, 30, 161230
 bx46 BMX46_GPS_1934_1988_, 2000-08-17,  CHS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.3166, 1.3648, 30, 17120
 bx46 BMX46_GPS_1934_1988_, 2000-08-18,  GDH ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.1518, 1.2017, 30, 171630
 bx46 BMX46_GPS_1934_1988_, 2002-09-10,  BW ,  USGS MENLO PARK ,  TRIMBLE,  3335A03898 ,  4000SSE NP,  TRM22020.00+GP,  0220126940,  NONE, 1.2306, 0, 30, 15570
 bx46 BMX46_GPS_1934_1988_, 2002-09-20,  JH ,  USGS MENLO PARK ,  TRIMBLE,  3427A06745 ,  4000SSE NP,  TRM22020.00+GP,  0220052070,  NONE, 1.3185, 0, 30, 15390