benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 cann Cann_1989_Oregon_DOT, 1993-08-16,  EE_ ,  USGS-CVO ,  ASHTECH LM-XII3,  005,  7A26,  ASH700228D,  005,  NONE, 1.5218, 1.5682, 15, 205645
 cann Cann_1989_Oregon_DOT, 1993-08-17,  EE_ ,  USGS-CVO ,  ASHTECH LM-XII3,  005,  7A26,  ASH700228D,  005,  NONE, 1.4968, 1.5434, 15, 205115
 cann Cann_1989_Oregon_DOT, 1997-08-13,  unknown ,  CVO ,  Trimble 4000SSi,  16106,  NP,  TRM29659.00,  66597,  NONE, 1.399, 0, 30, 135430
 cann Cann_1989_Oregon_DOT, 1997-08-14,  unknown ,  CVO ,  Trimble 4000SSi,  16106,  NP,  TRM29659.00,  66597,  NONE, 1.4065, 0, 30, 13550
 cann Cann_1989_Oregon_DOT, 1998-08-25,  ERIC W KERESTY ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  7882,  Nav,  TRM22020.00+GP,  114383,  NONE, 2, 0, 15, 145215
 cann Cann_1989_Oregon_DOT, 1998-08-26,  ERIC W KERESTY ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  7882,  Nav,  TRM22020.00+GP,  114383,  NONE, 2, 0, 15, 144815
 cann Cann_1989_Oregon_DOT, 1998-08-27,  ERIC W KERSETY ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  7882,  Nav,  TRM22020.00+GP,  114383,  NONE, 2, 0, 15, 18390
 cann Cann_1989_Oregon_DOT, 2011-07-30,  RM/ML ,  PSU ,  TRIMBLE 4000SSI,  14530,  NP,  TRM29659.00,  0220062092,  NONE, 1.0653, 0, 0, 22330
 cann Cann_1989_Oregon_DOT, 1994-08-19,  JMS ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.2785, 1.327, 30, 14480
 cann Cann_1989_Oregon_DOT, 2000-07-24,  CHS ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992805,  NONE, 1.3358, 1.3837, 30, 15430
 cann Cann_1989_Oregon_DOT, 2000-07-26,  JMS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14333,  NONE, 1.4549, 1.5018, 30, 15190