benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 sndy SNDY_2006_USGS, 2007-03-15,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 17390
 sndy SNDY_2006_USGS, 2007-03-16,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 sndy SNDY_2006_USGS, 2007-03-17,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 sndy SNDY_2006_USGS, 2007-03-18,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 sndy SNDY_2006_USGS, 2007-03-19,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.703, 0.7619, 30, 0
 sndy SNDY_2006_USGS, 2009-05-27,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 1.3935, 1.441, 30, 0
 sndy SNDY_2006_USGS, 2009-05-28,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 1.3935, 1.441, 30, 0
 sndy SNDY_2006_USGS, 2009-05-29,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 1.3935, 1.441, 30, 0
 sndy SNDY_2006_USGS, 2013-12-12,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 0.8928, 0.9469, 15, 0
 sndy SNDY_2006_USGS, 2013-12-13,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 0.8928, 0.9469, 15, 0
 sndy SNDY_2006_USGS, 2013-12-14,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 0.8928, 0.9469, 15, 0
 sndy SNDY_2006_USGS, 2013-12-15,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 0.8928, 0.9469, 15, 0
 sndy SNDY_2006_USGS, 2013-12-16,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 0.8928, 0.9469, 15, 0
 sndy SNDY_2006_USGS, 2019-04-23,  ELP ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00585,  NONE, 0.8305, 0.8859, 15, 204045
 sndy SNDY_2006_USGS, 2019-04-24,  ELP ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00585,  NONE, 0.8305, 0.8859, 15, 0
 sndy SNDY_2006_USGS, 2019-04-25,  ELP ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00585,  NONE, 0.8305, 0.8859, 15, 0
 sndy SNDY_2006_USGS, 2019-04-26,  ELP ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00585,  NONE, 0.8305, 0.8859, 15, 0