benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 f381, 2003-09-09,  MRF ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.4217, 1.4689, 30, 17530
 f381, 2003-09-10,  SHY ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.243, 1.2919, 30, 163230
 f381 F381_1984_NGS, 2007-09-07,  GDH ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 1.4378, 1.4849, 30, 155730
 f381 F381_1984_NGS, 2007-09-14,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.464, 1.5109, 30, 14360
 f381 F381_1984_NGS, 2008-02-27,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 1.5336, 1.58, 30, 163930
 f381 F381_1984_NGS, 2008-02-28,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 0.9397, 0.9929, 30, 171530
 f381 F381_1984_NGS, 2011-09-11,  JLS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.8253, 0.8809, 15, 144045
 f381 F381_1984_NGS, 2011-09-14,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 0.6844, 0.7439, 15, 142745
 f381 F381_1984_NGS, 2015-09-09,  ELP ,  USGS ,  JAVAD,  00619 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 1.3682, 1.4159, 15, 143315
 f381 F381_1984_NGS, 2015-09-10,  SW ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 0.8969, 0.9509, 15, 145415