benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 avi2 Aviation_2_1982_NGS, 1993-08-30,  JMS ,  USGS ,  ASHTECH LM-XII3,  2270,  7A,  ASH700228D,  2115,  NONE, 1.4714, 1.5182, 30, 21830
 avi2 Aviation_2_1982_NGS, 1996-06-12,  unknown ,  CVO ,  Trimble 4000SSE,  03058,  GammaNP,  TRM14532.00,  05159,  NONE, 1.6236, 0, 30, 134630
 avi2 Aviation_2_1982_NGS, 1996-06-13,  unknown ,  CVO ,  Trimble 4000SSE,  03058,  GammaNP,  TRM14532.00,  05159,  NONE, 1.6569, 0, 30, 13180
 avi2 Aviation_2_1982_NGS, 1998-11-13,  GRD/NGS/NOAA ,  NGS/NOAA ,  TRIMBLE SSI,  3748A20591,  7.27,  TRM22020.00+GP,  0220108548,  NONE, 1.7093, 0, 15, 151145
 avi2 Aviation_2_1982_NGS, 1993-08-27,  ML ,  USGS ,  ASHTECH,  1827 ,  LM-XII3 7A,  ASH700228D,  2104,  NONE, 1.47, 1.5168, 30, 2170
 avi2 Aviation_2_1982_NGS, 1993-08-28,  ML ,  USGS ,  ASHTECH,  1827 ,  LM-XII3 7A,  ASH700228D,  2104,  NONE, 1.467, 1.5139, 30, 185230
 avi2 Aviation_2_1982_NGS, 1993-08-29,  JMS ,  USGS ,  ASHTECH,  2270 ,  LM-XII3 7A,  ASH700228D,  2115,  NONE, 1.469, 1.5158, 30, 21590
 avi2 Aviation_2_1982_NGS, 1994-08-14,  Anthony Qamar ,  Univ of Wash ,  TRIMBLE,  3448 ,  4000SSE Nav,  4000ST,  8504,  L1/L2, 1.5565, 0, 15, 143115
 avi2 Aviation_2_1982_NGS, 1994-08-15,  Anthony Qamar ,  Univ of Wash ,  TRIMBLE,  3448 ,  4000SSE Nav,  4000ST,  8504,  L1/L2, 1.5525, 0, 15, 142245
 avi2 Aviation_2_1982_NGS, 1996-08-04,  CHS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1F00,  ASH700228D,  1036,  NONE, 1.5728, 1.6189, 30, 155730
 avi2 Aviation_2_1982_NGS, 1996-08-05,  CHS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1F00,  ASH700228D,  1036,  NONE, 1.5076, 1.5541, 30, 155630
 avi2 Aviation_2_1982_NGS, 2001-08-19,  CHS ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH701945.02B,  CR619992801,  NONE, 1.5133, 1.5598, 30, 155430
 avi2 Aviation_2_1982_NGS, 2001-08-20,  CHS ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH701945.02B,  CR619992801,  NONE, 1.5093, 1.5558, 30, 15310