benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 prtg Portage__steel_rod, 1993-06-10,  ,  ,  ROGUE,  T134 ,  SNR-8000 93.05,  AOAD/M_T,  *134,  NONE, 1.5891, 0, 30, 74030
 prtg Portage__steel_rod, 1993-06-13,  ,  ,  ROGUE,  116 ,  SNR-8000 7A,  AOAD/M_T,  *116,  NONE, 1.2795, 0, 30, 75030
 prtg Portage__steel_rod, 1993-06-14,  ,  ,  ROGUE,  T207 ,  SNR-8000 7A,  AOAD/M_T,  *228,  NONE, 1.3381, 0, 30, 63700
 prtg Portage__steel_rod, 1993-06-15,  ,  ,  ROGUE,  T127 ,  SNR-8000 7A,  AOAD/M_T,  *127,  NONE, 1.0365, 0, 30, 74100
 prtg Portage__steel_rod, 1995-05-23,  CLARK ,  USGS ,  ROGUE,  DS23 ,  SNR-8000 95.03,  AOAD/M_T,  DS23,  NONE, 1.5558, 0, 30, 153830
 prtg Portage__steel_rod, 1995-05-28,  PRESCOTT ,  USGS ,  ROGUE,  DS24 ,  SNR-8000 95.03,  AOAD/M_T,  DS24,  NONE, 1.0557, 0, 30, 17630
 prtg Portage__steel_rod, 1997-06-13,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  *734,  NONE, 1.3459, 1.3938, 30, 15580
 prtg Portage__steel_rod, 1997-06-14,  CHS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1E95,  ASH700936D_M,  CR14244,  NONE, 1.4075, 1.4548, 30, 154430
 prtg Portage__steel_rod, 1997-06-15,  JMS ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 1E95,  ASH700936D_M,  CR14333,  NONE, 1.472, 1.5188, 30, 155330
 prtg Portage__steel_rod, 1997-06-17,  JLS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E95,  ASH700936D_M,  *744,  NONE, 1.1589, 1.2088, 30, 16220
 prtg Portage__steel_rod, 2000-06-17,  JMS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.3459, 1.3938, 15, 19745
 prtg Portage__steel_rod, 2000-06-18,  JMS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.3459, 1.3938, 15, 45
 prtg Portage__steel_rod, 2000-06-19,  JMS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.3459, 1.3938, 15, 45
 prtg Portage__steel_rod, 2004-06-25,  JLS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR520031626,  NONE, 1.2814, 1.3299, 15, 171645
 prtg Portage__steel_rod, 2004-06-26,  JLS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR520031626,  NONE, 1.2814, 1.3299, 15, 15