benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 tirz TIRZ_unstamped, 1994-03-06,  UNKNOWN ,  MASS INST. OF TECHNO,  TRIMBLE 4000,  3053,  SSE,  TRM14532.00,  UNKNOWN,  NONE, 1.1551, 0, 30, 130
 tirz TIRZ_unstamped, 2008-02-13,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.7689, 0.8258, 30, 0
 tirz TIRZ_unstamped, 2008-02-14,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.7689, 0.8258, 30, 0
 tirz TIRZ_unstamped, 2011-03-16,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 0.7771, 0.8339, 15, 0