benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 cnwy, 1994-06-14,  unknown ,  NGS ,  TRIMBLE 4000SST,  333,  4.81,  TRM14532.00,  137,  NONE, 0.478, 0, 15, 181645
 cnwy, 2000-09-12,  JMS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.3782, 1.4258, 30, 15230
 cnwy, 2000-09-19,  JMS ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.2439, 1.2928, 30, 15630
 cnwy, 2004-09-12,  JLS ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE00,  ASH701945E_M,  CR520031626,  NONE, 1.1529, 1.2029, 30, 13420
 cnwy Conway_1956_USC&GS, 2004-09-16,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE00,  ASH701945E_M,  CR520031615,  NONE, 1.34, 1.3879, 30, 0
 cnwy Conway_1956_USC&GS, 2009-09-11,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.7473, 0.8048, 30, 0
 cnwy Conway_1956_USC&GS, 2009-09-12,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.7473, 0.8048, 30, 0
 cnwy Conway_1956_USC&GS, 2009-09-13,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.7473, 0.8048, 30, 0