benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 snlu SNLU_USGS, 2007-03-24,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.3894, 1.4369, 30, 0
 snlu SNLU_USGS, 2007-03-25,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.3894, 1.4369, 30, 0
 snlu SNLU_USGS, 2007-03-26,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.3894, 1.4369, 30, 0
 snlu SNLU_USGS, 2009-05-01,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.8386, 0.8938, 30, 0
 snlu SNLU_USGS, 2009-05-02,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.8386, 0.8938, 30, 0
 snlu SNLU_USGS, 2009-05-03,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.8386, 0.8938, 30, 0
 snlu SNLU_USGS, 2009-05-04,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.8386, 0.8938, 30, 0
 snlu SNLU_USGS, 2009-05-05,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14329,  NONE, 0.8386, 0.8938, 30, 0
 snlu SNLU_USGS, 2013-10-26,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022605,  NONE, 0.7628, 0.8199, 15, 155645
 snlu SNLU_USGS, 2013-10-27,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022605,  NONE, 0.7628, 0.8199, 15, 0
 snlu SNLU_USGS, 2013-10-28,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022605,  NONE, 0.7628, 0.8199, 15, 0
 snlu SNLU_USGS, 2013-10-29,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022605,  NONE, 0.7628, 0.8199, 15, 0