benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 ft73 Flat_1973_NCER, 1994-07-12,  JMS ,  USGS ,  ASHTECH,  765 ,  LM-XII3 7A,  ASH700228D,  1058,  NONE, 0.5023, 0.5696, 30, 162230
 ft73 Flat_1973_NCER, 2002-05-02,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 0.3972, 0.4718, 30, 17190
 ft73 Flat_1973_NCER, 2002-05-03,  JMS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 0.3972, 0.4718, 30, 10
 ft73 Flat_1973_NCER, 2005-05-19,  JMS ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 0.4983, 0.5659, 30, 0
 ft73 Flat_1973_NCER, 2005-05-20,  JMS ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 0.4983, 0.5659, 30, 0