benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 usg7 usgs_no_7_784_b, 1992-03-05,  JMS ,  USGS ,  ASHTECH,  765 ,  LM-XII3 6b,  ASH700228D,  1058,  NONE, 1.1396, 1.1897, 30, 7200
 usg7 usgs_no_7_784_b, 1994-05-04,  JMS ,  USGS ,  ASHTECH,  764 ,  LM-XII3 7A,  ASH700228A,  0598,  NONE, 1.1437, 1.1938, 30, 143630
 usg7 usgs_no_7_784_b, 1995-07-13,  JMS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1E00,  ASH700228A,  0745,  NONE, 1.1779, 1.2275, 30, 161330
 usg7 usgs_no_7_784_b, 1996-06-25,  JMS ,  USGS ,  ASHTECH,  707 ,  Z-XII3 1F00,  ASH700718B,  11404,  NONE, 1.1763, 1.226, 30, 1640
 usg7 usgs_no_7_784_b, 1997-08-05,  JMS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1E95,  ASH700936D_M,  CR14341,  NONE, 1.1964, 1.2458, 30, 155630
 usg7 usgs_no_7_784_b, 1997-10-09,  CHS ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 1E95,  ASH700936D_M,  CR14244,  NONE, 1.2125, 1.2617, 30, 154630
 usg7 usgs_no_7_784_b, 1999-02-03,  CHS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 CB00,  ASH700936D_M,  CR14333,  NONE, 1.2439, 1.2928, 30, 16360
 usg7 usgs_no_7_784_b, 1999-02-04,  JMS ,  USGS ,  ASHTECH,  LP03348 ,  Z-XII3 CB00,  ASH700936D_M,  CR14329,  NONE, 1.0839, 1.1348, 30, 17930
 usg7 usgs_no_7_784_b, 2001-03-26,  JMS ,   ,  ASHTECH,  O4597 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993703,  NONE, 1.2004, 1.2498, 30, 16370
 usg7 usgs_no_7_784_b, 2001-05-01,  JMS ,   ,  ASHTECH,  801 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.1528, 1.2027, 30, 163130
 usg7 usgs_no_7_784_b, 2005-02-02,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1448, 1.1949, 30, 16560
 usg7 usgs_no_7_784_b, 2005-02-03,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1408, 1.1909, 30, 16220
 usg7 usgs_no_7_784_b, 2014-07-15,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945B_M,  CR519993706,  NONE, 1.239, 1.2879, 15, 17115
 usg7 usgs_no_7_784_b, 2014-07-16,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945B_M,  CR519993706,  NONE, 1.2147, 1.2639, 15, 152645
 usg7 usgs_no_7_784_b, 2020-12-02,  ELP ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00457,  NONE, 1.0069, 1.0589, 15, 152030
 usg7 usgs_no_7_784_b, 2020-12-04,  ELP ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.7.6,  ASH700936D_M,  CR14330,  NONE, 0.8979, 0.9519, 15, 151145