benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 graz Grant_Az_Mk_1975_CDH, 1993-07-13,  KWC ,  USGS ,  ASHTECH LM-XII3,  099,  7A26,  ASH700228D,  1036,  NONE, 1.3448, 1.3927, 30, 23240
 gz75 Grant_Az_Mk_1975_CDH, 1992-08-14,  JMS ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.194, 1.2435, 30, 19830
 gz75 Grant_Az_Mk_1975_CDH, 1994-07-29,  GDH ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.2664, 1.3151, 30, 143730
 gz75 Grant_Az_Mk_1975_CDH, 1998-07-27,  JLS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CB00,  ASH700936D_M,  CR14330,  NONE, 1.1427, 1.1928, 30, 15440
 gz75 Grant_Az_Mk_1975_CDH, 1998-07-28,  JMS ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 1E95,  ASH700936E_C,  CR16381,  NONE, 1.2762, 1.3248, 30, 154830
 gz75 Grant_Az_Mk_1975_CDH, 1999-07-24,  RBG ,   ,  ASHTECH,  4600 ,  Z-XII3 CC00,  ASH700936D_M,  CR14341,  NONE, 1.3025, 1.3508, 30, 162430
 gz75 Grant_Az_Mk_1975_CDH, 1999-07-27,  SKM ,   ,  ASHTECH,  188 ,  Z-XII3 CB00,  ASH700936E_C,  CR16376,  NONE, 1.1386, 1.1887, 30, 15300
 gz75 Grant_Az_Mk_1975_CDH, 2002-07-17,  BDK ,  USGS ,  ASHTECH,  LP03192 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 1.1651, 1.2149, 30, 15250
 gz75 Grant_Az_Mk_1975_CDH, 2002-07-18,  CWA ,  USGS ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.2116, 1.2609, 30, 15100
 gz75 Grant_Az_Mk_1975_CDH, 2005-07-27,  JMS ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 1.2915, 1.3399, 30, 155930
 gz75 Grant_Az_Mk_1975_CDH, 2005-07-29,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 1.1924, 1.2419, 30, 154530
 gz75 Grant_Az_Mk_1975_CDH, 2007-07-22,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.1307, 1.1809, 30, 154930
 gz75 Grant_Az_Mk_1975_CDH, 2007-07-27,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1469, 1.1969, 30, 155330