benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 r424, 2001-09-16,  TD ,  USGS ,  TRIMBLE,  3608A14632 ,  4000SSI NP,  TRM29659.00,  0220073545,  NONE, 1.1676, 0, 0, 154930
 r424, 2001-09-23,  WRT ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.2975, 1.3458, 30, 1650
 r424 R424_1978_NGS, 2005-09-25,  WRT ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022605,  NONE, 1.0901, 1.1409, 30, 16030
 r424 R424_1978_NGS, 2006-09-15,  GDH ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945B_M,  CR519993702,  NONE, 0.494, 0.5618, 30, 16030
 r424 R424_1978_NGS, 2006-09-16,  CHS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.2491, 1.2979, 30, 151430
 r424 R424_1978_NGS, 2012-09-19,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 1.3157, 1.3638, 15, 161415
 r424 R424_1978_NGS, 2012-09-20,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 1.1479, 1.1979, 15, 16250