benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 o227 Offset_227_1934_USCG, 2010-04-10,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.3928, 0.4678, 15, 16045
 o227 Offset_227_1934_USCG, 2010-04-11,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.3928, 0.4678, 15, 0
 o227 Offset_227_1934_USCG, 2010-04-12,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.3928, 0.4678, 15, 0