benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 hogb, 2003-09-21,  WCH ,  USGS ,  ASHTECH,  LP03203 ,  Z-XII3 CD00,  ASH700936E_C,  CR16374,  NONE, 0.3895, 0.4648, 30, 18530
 hogb, 2003-09-22,  WCH ,  USGS ,  ASHTECH,  LP03203 ,  Z-XII3 CD00,  ASH700936E_C,  CR16374,  NONE, 0.3895, 0.4648, 30, 10
 hogb, 2003-09-23,  WCH ,  USGS ,  ASHTECH,  LP03203 ,  Z-XII3 CD00,  ASH700936E_C,  CR16374,  NONE, 0.3895, 0.4648, 30, 10
 hogb HOGB_USGS, 2008-10-18,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 0.5448, 0.6099, 30, 0
 hogb HOGB_USGS, 2008-10-19,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 0.5448, 0.6099, 30, 0
 hogb HOGB_USGS, 2008-10-20,  JLS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945E_M,  CR520031615,  NONE, 0.5448, 0.6099, 30, 0
 hogb HOGB_USGS, 2014-09-14,  WRT ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945B_M,  CR519993706,  NONE, 1.3097, 1.3579, 15, 162145
 hogb HOGB_USGS, 2014-10-22,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR520031615,  NONE, 0.8069, 0.8629, 15, 175515
 hogb HOGB_USGS, 2014-10-23,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR520031615,  NONE, 0.8069, 0.8629, 15, 0
 hogb HOGB_USGS, 2014-10-24,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945E_M,  CR520031615,  NONE, 0.8069, 0.8629, 15, 0