benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 bm80 BM_80_2253_B_1907_USG, 1994-11-18,  KWC ,  USGS ,  ASHTECH Z-XII3,  O4597,  1E00,  ASH700228A,  0598,  NONE, 1.1588, 1.2087, 30, 14460
 bm80 BM_80_2253_B_1907_USG, 1996-02-11,  GDH ,  USGS ,  ASHTECH Z-XII3,  O4597,  1F00,  ASH700228A,  0598,  NONE, 1.2141, 1.2633, 30, 290
 bm80 BM_80_2253_B_1907_USG, 1996-02-17,  JMS ,  USGS ,  ASHTECH Z-XII3,  4600,  1F00,  ASH700228D,  1036,  NONE, 1.1537, 1.2037, 30, 16460
 bm80 BM_80_2253_B_1907_USG, 1997-10-29,  JMS ,  USGS ,  ASHTECH Z-XII3,  4600,  1E95,  ASH700936D_M,  CR14333,  NONE, 1.2297, 1.2787, 30, 1530
 bm80 BM_80_2253_B_1907_USG, 1997-11-04,  GDH ,  USGS ,  ASHTECH Z-XII3,  O4579,  1E95,  ASH700936D_M,  CR14333,  NONE, 1.2156, 1.2648, 30, 16450
 bm80 BM_80_2253_B_1907_USG, 1999-04-19,  JLS ,  USGS ,  ASHTECH Z-XII3,  O4582,  CB00,  ASH700936E_C,  CR16116,  NONE, 1.1518, 1.2017, 30, 16330
 bm80 BM_80_2253_B_1907_USG, 1999-04-20,  GDH ,  USGS ,  ASHTECH Z-XII3,  O4579,  1E95,  ASH700936E_C,  CR16975,  NONE, 1.1356, 1.1858, 30, 155330
 bm80 BM_80_2253_B_1907_USG, 2003-06-08,  JLS ,  USGS ,  ASHTECH Z-XII3,  LP019992809,  CD00,  ASH700936D_M,  CR14333,  NONE, 1.1317, 1.1819, 30, 155030
 bm80 BM_80_2253_B_1907_USG, 2003-06-09,  GDH ,  USGS ,  ASHTECH Z-XII3,  LP019992803,  CD00,  ASH701945E_M,  CR620022605,  NONE, 1.1965, 1.2459, 30, 154830
 bm80 BM_80_2253_B_1907_USG, 2014-03-21,  JLS ,  USGS ,  JAVAD TRE_G3TH,  00598,  SIGMA3.3.1,  ASH701945E_M,  CR520031622,  NONE, 1.24, 1.2889, 15, 13745
 bm80 BM_80_2253_B_1907_USG, 2014-03-22,  JLS ,  USGS ,  JAVAD TRE_G3TH,  00619,  SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 1.2036, 1.2529, 15, 135215