benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 is01 IS01_unstamped, 2007-10-02,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945B_M,  CR519993702,  NONE, 0.6388, 0.6999, 30, 0
 is01 IS01_unstamped, 2007-10-03,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945B_M,  CR519993702,  NONE, 0.6388, 0.6999, 30, 0
 is01 IS01_unstamped, 2007-10-04,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945B_M,  CR519993702,  NONE, 0.6388, 0.6999, 30, 0
 is01 IS01_unstamped, 2009-04-23,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR620022602,  NONE, 1.461, 1.5079, 30, 15450
 is01 IS01_unstamped, 2011-06-21,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992801,  NONE, 1.5839, 1.6299, 15, 18345
 is01 IS01_unstamped, 2011-06-22,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992801,  NONE, 1.5839, 1.6299, 15, 0
 is01 IS01_unstamped, 2011-06-23,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992801,  NONE, 1.5839, 1.6299, 15, 0
 is01 IS01_unstamped, 2014-09-09,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 161215
 is01 IS01_unstamped, 2014-09-10,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 0
 is01 IS01_unstamped, 2014-09-11,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 0
 is01 IS01_unstamped, 2014-09-12,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 0
 is01 IS01_unstamped, 2014-09-13,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 0
 is01 IS01_unstamped, 2014-09-14,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 0
 is01 IS01_unstamped, 2014-09-15,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.9774, 1.0299, 15, 0