benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 6683, 2000-09-16,  JMS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993705,  NONE, 1.1427, 1.1928, 30, 164230
 6683, 2000-09-18,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993705,  NONE, 1.1346, 1.1848, 30, 15420
 6683, 2002-05-01,  JMS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.1955, 1.2449, 30, 10
 6683, 2002-05-02,  JMS ,  USGS ,  ASHTECH,  LP019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.1955, 1.2449, 30, 10
 6683 6683_1907_USGS, 2004-09-19,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH701945B_M,  CR619992801,  NONE, 1.1347, 1.1849, 30, 171730
 6683 6683_1907_USGS, 2004-09-20,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE00,  ASH701945B_M,  CR619992801,  NONE, 1.1347, 1.1849, 30, 0
 6683 6683_1907_USGS, 2009-09-14,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.1418, 1.1919, 30, 165630
 6683 6683_1907_USGS, 2009-09-15,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.1418, 1.1919, 30, 0
 6683 6683_1907_USGS, 2009-09-16,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 1.1418, 1.1919, 30, 0