benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 no4s NO4S_1924_USGS, 2008-11-21,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.8089, 0.8648, 30, 172730
 no4s NO4S_1924_USGS, 2008-11-22,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.8089, 0.8648, 30, 0