benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 cbl1, 1998-09-16,  MAXWELL L MCCREADY ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  4871,  Nav,  TRM22020.00+GP,  249,  NONE, 2, 0, 15, 132315
 cbl1, 1998-09-17,  MAXWELL L MCCREADY ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  4871,  Nav,  TRM22020.00+GP,  249,  NONE, 2, 0, 15, 171430
 cbl1, 1998-09-18,  MAXWELL L MCCREADY ,  NATIONAL GEODETIC SU,  TRIMBLE 4000SSE,  4871,  Nav,  TRM22020.00+GP,  249,  NONE, 2, 0, 15, 131515
 cbl1, 2001-09-10,  JMS ,   ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.477, 1.5238, 30, 162330
 cbl1, 2001-09-16,  WRT ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14330,  NONE, 1.5435, 1.5898, 30, 174530
 cbl1 CBL-1_1980_USE, 2005-09-14,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.3904, 1.4379, 30, 153830
 cbl1 CBL-1_1980_USE, 2005-09-18,  WRT ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.2602, 1.3089, 30, 16230
 cbl1 CBL-1_1980_USE, 2010-08-08,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.8846, 0.9388, 15, 17715
 cbl1 CBL-1_1980_USE, 2010-08-09,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.8846, 0.9388, 15, 0