benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 grn1 Green_No.1_1932_USC&, 2007-10-17,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.7977, 0.8539, 30, 17440
 grn1 Green_No.1_1932_USC&, 2007-10-18,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.7977, 0.8539, 30, 0
 grn1 Green_No.1_1932_USC&, 2007-10-19,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.7977, 0.8539, 30, 0
 grn1 Green_No.1_1932_USC&, 2007-10-20,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.7977, 0.8539, 30, 0
 grn1 Green_No.1_1932_USC&, 2007-10-21,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.7977, 0.8539, 30, 0
 grn1 Green_No.1_1932_USC&, 2008-10-27,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945E_M,  CR620022605,  NONE, 1.4187, 1.4659, 30, 0
 grn1 Green_No.1_1932_USC&, 2008-12-10,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.3349, 1.3829, 30, 0
 grn1 Green_No.1_1932_USC&, 2010-03-28,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.0079, 1.0599, 15, 181445
 grn1 Green_No.1_1932_USC&, 2010-03-29,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.0079, 1.0599, 15, 0
 grn1 Green_No.1_1932_USC&, 2010-03-30,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 1.0079, 1.0599, 15, 0
 grn1 Green_No.1_1932_USC&, 2019-04-24,  ELP ,  USGS ,  JAVAD,  01657 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.7751, 0.8319, 15, 134330
 grn1 Green_No.1_1932_USC&, 2019-04-25,  ELP ,  USGS ,  JAVAD,  01657 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.7751, 0.8319, 15, 0
 grn1 Green_No.1_1932_USC&, 2019-04-26,  ELP ,  USGS ,  JAVAD,  01657 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00459,  NONE, 0.7751, 0.8319, 15, 0