benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 cow2 COW2_USGS, 2011-04-19,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.8877, 0.9419, 15, 173415
 cow2 COW2_USGS, 2011-04-20,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.8877, 0.9419, 15, 0
 cow2 COW2_USGS, 2011-04-21,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.8877, 0.9419, 15, 0
 cow2 COW2_USGS, 2012-04-03,  JLS ,  USGS ,  JAVAD,  00622 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.6792, 0.7388, 15, 154915
 cow2 COW2_USGS, 2012-04-04,  JLS ,  USGS ,  JAVAD,  00622 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.6792, 0.7388, 15, 0
 cow2 COW2_USGS, 2012-04-05,  JLS ,  USGS ,  JAVAD,  00622 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.6792, 0.7388, 15, 0
 cow2 COW2_USGS, 2012-04-06,  JLS ,  USGS ,  JAVAD,  00622 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14330,  NONE, 0.6792, 0.7388, 15, 0