benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 2271, 2003-02-10,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.6131, 1.6589, 30, 174130
 2271, 2003-02-11,  CHS ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.4126, 1.4599, 30, 16320
 2271 22-271_CalTrans, 2006-02-22,  GDH ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.3803, 1.4279, 30, 163730
 2271 22-271_CalTrans, 2006-02-23,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.59, 1.636, 30, 16510
 2271 22-271_CalTrans, 2009-03-16,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 1.461, 1.5079, 30, 15370
 2271 22-271_CalTrans, 2009-03-17,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 1.5839, 1.6299, 30, 15470