benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 sprn, 1994-03-22,  KWC ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 0.4506, 0.5212, 30, 173430
 sprn Spring_1947_USGS, 2002-04-03,  CHS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 1.2804, 1.3289, 30, 185430
 sprn Spring_1947_USGS, 2002-04-04,  CHS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 1.2804, 1.3289, 30, 10
 sprn Springs_1947_USGS, 2006-04-21,  JMS ,  USGS ,  ASHTECH,  ZE1200411029 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.4438, 0.5148, 30, 0
 sprn Springs_1947_USGS, 2006-04-22,  JMS ,  USGS ,  ASHTECH,  ZE1200411029 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.4438, 0.5148, 30, 0
 sprn Springs_1947_USGS, 2006-04-23,  JMS ,  USGS ,  ASHTECH,  ZE1200411029 ,  Z-X ZE21,  ASH701945E_M,  CR520031626,  NONE, 0.4438, 0.5148, 30, 0