benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 must MUST_2006_USGS, 2007-03-23,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.643, 0.7039, 30, 185330
 must MUST_2006_USGS, 2007-03-24,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.643, 0.7039, 30, 0
 must MUST_2006_USGS, 2007-03-25,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.643, 0.7039, 30, 0
 must MUST_2006_USGS, 2007-03-26,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 0.643, 0.7039, 30, 0
 must MUST_2006_USGS, 2009-05-27,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.9703, 1.0229, 30, 0
 must MUST_2006_USGS, 2009-05-28,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.9703, 1.0229, 30, 0
 must MUST_2006_USGS, 2009-05-29,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.9703, 1.0229, 30, 0
 must MUST_2006_USGS, 2013-10-23,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 1.0434, 1.0948, 15, 181645
 must MUST_2006_USGS, 2013-10-24,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 1.0434, 1.0948, 15, 0
 must MUST_2006_USGS, 2013-10-25,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 1.0434, 1.0948, 15, 0
 must MUST_2006_USGS, 2013-10-26,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 1.0434, 1.0948, 15, 0
 must MUST_2006_USGS, 2019-04-03,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  00488,  NONE, 1.5849, 1.6309, 15, 14380
 must MUST_2006_USGS, 2019-04-04,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  00488,  NONE, 1.5849, 1.6309, 15, 0