benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 g300, 1996-09-29,  JMS ,  USGS ,  ASHTECH Z-XII3,  345,  1G00,  unknown,  *177,  NONE, 1.1064, 0, 30, 235959.998
 g300, 1996-09-30,  JMS ,  USGS ,  ASHTECH Z-XII3,  345,  1G00,  unknown,  *177,  NONE, 1.1064, 0, 30, 235959.871
 g300 G300_stmpd_3213S_USG, 1992-10-20,   ,   ,  TURBOROGUE,  115 ,   ,  AOAD/M_T,  115,  NONE, 0.6668, 0, 30, 0
 g300 G300_stmpd_3213S_USG, 1992-10-21,   ,   ,  TURBOROGUE,  115 ,   ,  AOAD/M_T,  115,  NONE, 0.7185, 0, 30, 0
 g300 G300_stmpd_3213S_USG, 1992-10-22,   ,   ,  TURBOROGUE,  115 ,   ,  AOAD/M_T,  115,  NONE, 0.7618, 0, 30, 0
 g300, 1996-09-27,  JMS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1F00,  ASH700228A,  0598,  NONE, 1.1074, 1.1579, 30, 17580
 g300, 1996-09-28,  JMS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1F00,  ASH700228A,  0598,  NONE, 1.1074, 1.1579, 30, 235959.958
 g300, 1998-09-25,  JMS ,  USGS ,  ASHTECH,  192 ,  Z-XII3 CB00,  ASH700936D_M,  CR14341,  NONE, 1.1376, 1.1877, 30, 15190
 g300, 1998-09-26,  JMS ,  USGS ,  ASHTECH,  192 ,  Z-XII3 CB00,  ASH700936D_M,  CR14341,  NONE, 1.1376, 1.1877, 30, 30
 g300, 1998-09-27,  CHS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 CB00,  ASH700936D_M,  CR14329,  NONE, 1.1407, 1.1908, 30, 145130
 g300, 1998-09-28,  CHS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 CB00,  ASH700936D_M,  CR14329,  NONE, 1.1407, 1.1908, 30, 10
 g300 G300_stmpd_3213S_USG, 2002-09-16,  WC ,  USGS MENLO PARK ,  TRIMBLE,  4005A27617 ,  4000SSI NP,  TRM22020.00+GP,  0220051636,  NONE, 0.9174, 0, 30, 41630
 g300 G300_stmpd_3213S_USG, 2002-09-17,  WC ,  USGS MENLO PARK ,  TRIMBLE,  4005A27617 ,  4000SSI NP,  TRM22020.00+GP,  0220051636,  NONE, 0.9174, 0, 30, 30
 g300 G300_stmpd_3213S_USG, 2002-09-18,  WC ,  USGS MENLO PARK ,  TRIMBLE,  4005A27617 ,  4000SSI NP,  TRM22020.00+GP,  0220051636,  NONE, 0.9174, 0, 30, 30
 g300 G300_stmpd_3213S_USG, 2015-07-11,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.3.1,  ASH701945B_M,  CR519993702,  NONE, 0.7566, 0.8139, 15, 192815
 g300 G300_stmpd_3213S_USG, 2015-07-12,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.3.1,  ASH701945B_M,  CR519993702,  NONE, 0.7566, 0.8139, 15, 0
 g300 G300_stmpd_3213S_USG, 2015-07-13,  ELP ,  USGS ,  JAVAD,  00621 ,  TRE_G3TH SIGMA3.3.1,  ASH701945B_M,  CR519993702,  NONE, 0.7566, 0.8139, 15, 0