benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 dryy DRY_1938_USC&GS, 1994-05-31,  unknown ,  NGS ,  TRIMBLE 4000SSE,  1571,  5.60,  TRM14532.00,  747,  NONE, 2.22, 0, 15, 185815
 dryy DRY_1938_USC&GS, 1994-06-02,  unknown ,  NGS ,  TRIMBLE 4000SST,  1571,  5.60,  TRM14532.00,  747,  NONE, 2.22, 0, 15, 185015
 dryy, 1999-05-03,   ,   ,  TRIMBLE 4000SSE,  4869,  7.25,  4000ST,  76725,  L1/L2, 2, 0, 30, 194230
 dryy, 1999-05-04,   ,   ,  TRIMBLE 4000SSE,  4869,  7.25,  4000ST,  76725,  L1/L2, 2, 0, 30, 153330
 dryy, 1999-05-24,   ,   ,  TRIMBLE 4000SSE,  7286,  7.28,  4000ST,  115395,  L1/L2, 2, 0, 30, 18200
 dryy, 1999-06-04,   ,   ,  TRIMBLE 4000SSE,  11526,  7.25,  4000ST,  30426,  L1/L2, 2, 0, 30, 173230
 dryy DRY_1938_USC&GS, 2002-06-06,  GDH ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2015, 1.2509, 30, 16330
 dryy DRY_1938_USC&GS, 2002-06-07,  GDH ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2015, 1.2509, 30, 10