benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 pier Pierce_1923_USC&GS, 2001-07-12,  CHS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.4639, 1.5108, 30, 16360
 pier Pierce2_1923_USC&GS, 2004-07-19,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE00,  ASH701945E_M,  CR620022605,  NONE, 1.4076, 1.4549, 30, 174830
 pier Pierce2_1923_USC&GS, 2004-07-20,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE00,  ASH701945E_M,  CR620022605,  NONE, 1.4076, 1.4549, 30, 0
 pier Pierce2_1923_USC&GS, 2004-07-21,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE00,  ASH701945E_M,  CR620022605,  NONE, 1.4076, 1.4549, 30, 0