benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 gent, 1998-09-11,  SCOTT M LOKKEN ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  7882,  Nav,  TRM22020.00+GP,  114383,  NONE, 2, 0, 15, 13410
 gent, 1998-09-14,  SCOTT M LOKKEN ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  7882,  Nav,  TRM22020.00+GP,  114383,  NONE, 2, 0, 15, 172715
 gent, 1998-09-15,  SCOTT M LOKKEN ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  7882,  Nav,  TRM22020.00+GP,  114383,  NONE, 2, 0, 15, 131515
 gent, 2001-09-11,  TD ,  USGS ,  TRIMBLE,  3608A14594 ,  4000SSI NP,  TRM29659.00,  0220089288,  NONE, 1.5139, 0, 0, 15560
 gent, 2001-09-18,  JMS ,   ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.5043, 1.5509, 30, 15550
 gent Gent_1989_ODOT, 2005-09-21,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.4066, 1.4539, 30, 16530
 gent Gent_1989_ODOT, 2006-09-19,  SAH ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.3783, 1.4259, 30, 161030
 gent Gent_1989_GPS_Statio, 2010-09-13,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 1.5718, 1.6179, 15, 16545
 gent Gent_1989_GPS_Statio, 2010-09-14,  JMS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 1.6564, 1.7019, 15, 161515