benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 bgsp, 2010-02-20,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 0.7484, 0.8059, 15, 0
 bgsp, 2010-02-21,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 0.7484, 0.8059, 15, 0
 bgsp, 2010-02-22,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 0.7484, 0.8059, 15, 0
 bgsp, 2010-07-22,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp, 2010-07-23,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp, 2010-07-24,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp, 2010-07-25,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp, 2010-07-26,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp, 2010-07-27,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp, 2010-07-28,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.6076, 0.6699, 15, 0
 bgsp BGSP_USGS, 2012-10-16,  JLS ,  USGS ,  JAVAD,  00620 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.7401, 0.7978, 15, 154015
 bgsp BGSP_USGS, 2012-10-17,  JLS ,  USGS ,  JAVAD,  00620 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.7401, 0.7978, 15, 0
 bgsp BGSP_USGS, 2012-10-18,  JLS ,  USGS ,  JAVAD,  00620 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.7401, 0.7978, 15, 0
 bgsp BGSP_USGS, 2013-05-22,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.7905, 0.8469, 15, 0
 bgsp BGSP_USGS, 2013-05-23,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 0.7905, 0.8469, 15, 0
 bgsp BGSP_USGS, 2015-12-08,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.9,  ASH701945E_M,  CR520031615,  NONE, 0.6471, 0.7078, 15, 18570
 bgsp BGSP_USGS, 2015-12-09,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.9,  ASH701945E_M,  CR520031615,  NONE, 0.6471, 0.7078, 15, 0
 bgsp BGSP_USGS, 2015-12-10,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.9,  ASH701945E_M,  CR520031615,  NONE, 0.6471, 0.7078, 15, 0
 bgsp BGSP_USGS, 2015-12-11,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.9,  ASH701945E_M,  CR520031615,  NONE, 0.6471, 0.7078, 15, 0
 bgsp BGSP_USGS, 2022-07-11,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.6761, 0.7358, 15, 211745
 bgsp BGSP_USGS, 2022-07-12,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.6761, 0.7358, 15, 0
 bgsp BGSP_USGS, 2022-07-13,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.6761, 0.7358, 15, 0
 bgsp BGSP_USGS, 2022-07-14,  ELP ,  USGS ,  JAVAD,  00598 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.6761, 0.7358, 15, 0