benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 3crs 3CRS_2005_USGS, 2005-11-01,  JLS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.5036, 0.5708, 30, 0
 3crs 3CRS_2005_USGS, 2005-11-02,  JLS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.5036, 0.5708, 30, 0
 3crs 3CRS_2005_USGS, 2006-08-17,  CHS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.5574, 0.6219, 30, 17120
 3crs 3CRS_2005_USGS, 2006-08-18,  CHS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.5574, 0.6219, 30, 0
 3crs 3CRS_2005_USGS, 2006-08-19,  CHS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 0.5574, 0.6219, 30, 0
 3crs 3CRS_2005_USGS, 2008-07-13,  CHS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.5815, 0.6449, 30, 0
 3crs 3CRS_2005_USGS, 2008-07-14,  CHS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.5815, 0.6449, 30, 0
 3crs 3CRS_2005_USGS, 2008-07-15,  CHS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.5815, 0.6449, 30, 0
 3crs 3CRS_2005_USGS, 2010-07-14,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH700936D_M,  CR14330,  NONE, 0.6834, 0.7428, 15, 0
 3crs 3CRS_2005_USGS, 2010-07-15,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH700936D_M,  CR14330,  NONE, 0.6834, 0.7428, 15, 0
 3crs 3CRS_2005_USGS, 2010-07-16,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE210,  ASH700936D_M,  CR14330,  NONE, 0.6834, 0.7428, 15, 0