benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 negr, 2003-09-11,  SHY ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.2015, 1.2509, 30, 1620
 negr, 2003-09-12,  MRF ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.1428, 1.1929, 30, 1630
 negr NEGRI_1960_USC&GS, 2007-09-09,  GDH ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1671, 1.2169, 30, 1600
 negr NEGRI_1960_USC&GS, 2007-09-16,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.2794, 1.3279, 30, 143730
 negr NEGRI_1960_USC&GS, 2011-09-18,  JLS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.5078, 0.5748, 15, 145815
 negr NEGRI_1960_USC&GS, 2011-09-19,  JLS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.5078, 0.5748, 15, 0