benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 loop, 1999-09-19,  WRT ,   ,  ASHTECH,  188 ,  Z-XII3 CD00,  ASH700936E_C,  CR16365,  NONE, 1.2055, 1.2548, 30, 1570
 loop, 1999-09-20,  WRT ,   ,  ASHTECH,  188 ,  Z-XII3 CD00,  ASH700936E_C,  CR16365,  NONE, 1.2055, 1.2548, 30, 2320
 loop Loop_USGS_unstmpd, 2003-07-01,  WCH ,  USGS ,  ASHTECH,  LP02232 ,  Z-XII3 6J00,  ASH701945E_M,  CR620022605,  NONE, 0.5469, 0.6119, 30, 153915
 loop Loop_USGS_unstmpd, 2003-07-02,  WCH ,  USGS ,  ASHTECH,  LP02232 ,  Z-XII3 6J00,  ASH701945E_M,  CR620022605,  NONE, 0.5469, 0.6119, 30, 0
 loop Loop_USGS_unstmpd, 2008-10-23,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.5205, 0.5868, 30, 0
 loop Loop_USGS_unstmpd, 2008-10-24,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.5205, 0.5868, 30, 0
 loop Loop_USGS_unstmpd, 2008-10-25,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.5205, 0.5868, 30, 0
 loop Loop_USGS_unstmpd, 2014-09-17,  WRT ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945B_M,  CR519993706,  NONE, 1.3359, 1.3839, 15, 162845
 loop Loop_USGS_unstmpd, 2014-10-23,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3511, 1.3989, 15, 171615
 loop Loop_USGS_unstmpd, 2014-10-24,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3511, 1.3989, 15, 0
 loop Loop_USGS_unstmpd, 2014-10-25,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3511, 1.3989, 15, 0
 loop Loop_USGS_unstmpd, 2014-10-26,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.3511, 1.3989, 15, 0