benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 frdg FRDG_USGS, 2009-08-22,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200331018,  ZE210A13,  ASH700936D_M,  CR14329,  NONE, 0.6658, 0.7259, 30, 0
 frdg FRDG_USGS, 2009-08-23,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200331018,  ZE210A13,  ASH700936D_M,  CR14329,  NONE, 0.6658, 0.7259, 30, 0
 frdg FRDG_USGS, 2009-08-24,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200331018,  ZE210A13,  ASH700936D_M,  CR14329,  NONE, 0.6658, 0.7259, 30, 0
 frdg FRDG_USGS, 2010-07-07,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE210A13,  ASH701945B_M,  CR519993702,  NONE, 0.6253, 0.6868, 15, 17415
 frdg FRDG_USGS, 2010-07-08,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE210A13,  ASH701945B_M,  CR519993702,  NONE, 0.6253, 0.6868, 15, 0
 frdg FRDG_USGS, 2010-07-09,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE210A13,  ASH701945B_M,  CR519993702,  NONE, 0.6253, 0.6868, 15, 0
 frdg FRDG_USGS, 2010-07-10,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200331017,  ZE210A13,  ASH701945B_M,  CR519993702,  NONE, 0.6253, 0.6868, 15, 0
 frdg FRDG_USGS, 2012-06-27,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200526028,  ZE210A13,  ASH701945E_M,  CR620022601,  NONE, 0.8806, 0.9349, 15, 0
 frdg FRDG_USGS, 2012-06-28,  CHS ,  USGS ,  ASHTECH Z-X,  ZE1200526028,  ZE210A13,  ASH701945E_M,  CR620022601,  NONE, 0.8806, 0.9349, 15, 0
 frdg FRDG_USGS, 2015-06-23,  JLS ,  USGS ,  JAVAD TRE_G3TH,  00618,  SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7833, 0.8399, 15, 182315
 frdg FRDG_USGS, 2015-06-24,  JLS ,  USGS ,  JAVAD TRE_G3TH,  00618,  SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7833, 0.8399, 15, 0
 frdg FRDG_USGS, 2015-06-25,  JLS ,  USGS ,  JAVAD TRE_G3TH,  00618,  SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7833, 0.8399, 15, 0
 frdg FRDG_USGS, 2015-06-26,  JLS ,  USGS ,  JAVAD TRE_G3TH,  00618,  SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 0.7833, 0.8399, 15, 0