benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 cr88 CROCK_1988_NCER, 2006-10-17,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992801,  NONE, 0.6222, 0.6839, 30, 165630
 cr88 CROCK_1988_NCER, 2006-10-18,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992801,  NONE, 0.6222, 0.6839, 30, 0
 cr88 CROCK_1988_NCER, 2006-10-19,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992801,  NONE, 0.6222, 0.6839, 30, 0
 cr88 CROCK_1988_NCER, 2006-10-20,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992801,  NONE, 0.6222, 0.6839, 30, 0
 cr88 CROCK_1988_NCER, 2010-04-29,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.5194, 0.5858, 15, 0
 cr88 CROCK_1988_NCER, 2010-04-30,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945B_M,  CR519993702,  NONE, 0.5194, 0.5858, 15, 0
 cr88 CROCK_1988_NCER, 2013-07-30,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.8897, 0.9438, 15, 184345
 cr88 CROCK_1988_NCER, 2013-07-31,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.8897, 0.9438, 15, 0
 cr88 CROCK_1988_NCER, 2013-08-01,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.8897, 0.9438, 15, 0