benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 KNCK, 2001-09-18,  GB ,  USGS ,  TRIMBLE,  3608A14631 ,  4000SSI NP,  TRM29659.00,  0220073540,  NONE, 1.3159, 0, 0, 1620
 knck, 2001-09-25,  WCH ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.0961, 1.1468, 30, 15560
 knck Knck_USGS, 2006-09-14,  CHS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1843, 1.2338, 30, 154130
 knck Knck_USGS, 2012-09-16,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 1.1448, 1.1949, 15, 172345
 knck Knck_USGS, 2012-09-18,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 1.3157, 1.3638, 15, 155415
 knck Knck_USGS, 2016-09-01,  WRT ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14329,  NONE, 1.1621, 1.2119, 15, 15280
 knck Knck_USGS, 2016-09-04,  WRT ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14329,  NONE, 1.2551, 1.3039, 15, 151930