benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 word Worden_USC&GS, 1993-08-30,  KWC ,  USGS ,  ASHTECH LM-XII3,  274,  7A,  ASH700228A,  134,  NONE, 1.1386, 1.1887, 30, 205930
 word Worden_USC&GS, 1993-08-29,  KWC ,  USGS ,  ASHTECH,  274 ,  LM-XII3 7A,  ASH700228A,  134,  NONE, 1.1618, 1.2116, 30, 22180
 word Worden_USC&GS, 1996-08-07,  JMS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1F00,  ASH700228D,  1068,  NONE, 1.2473, 1.2961, 30, 16420
 word Worden_USC&GS, 1996-08-09,  GDH ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1F00,  ASH700228D,  1036,  NONE, 1.2533, 1.3021, 30, 162330
 word Worden_USC&GS, 2002-08-17,  JLS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.3622, 1.4099, 30, 163030
 word Worden_USC&GS, 2002-08-18,  JLS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.3622, 1.4099, 30, 10
 word Worden_USC&GS, 2002-08-19,  JLS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.3622, 1.4099, 30, 10
 word Worden_USC&GS, 2004-08-19,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031626,  NONE, 1.4348, 1.4819, 30, 30
 word Worden_USC&GS, 2004-08-20,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031626,  NONE, 1.4348, 1.4819, 30, 30
 word Worden_USC&GS, 2004-08-21,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031626,  NONE, 1.4348, 1.4819, 30, 30