benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 chec C_ECC_NCER, 1993-05-11,  GDH ,  USGS ,  ASHTECH LM-XII0C,  99,  6M,  LM-XII,  036,  NONE, 1.2956, 0, 30, 3030
 chec C_ECC_NCER, 1992-04-13,  WKG ,  USGS ,  ASHTECH,  763 ,  LM-XII3 6b,  ASH700228A,  1026,  NONE, 1.3273, 1.3753, 30, 15530
 chec C_ECC_NCER, 1992-10-22,  JMS ,  USGS ,  ASHTECH,  749 ,  LM-XII3 6M24,  ASH700228A,  0598,  NONE, 1.2955, 1.3439, 30, 15590
 chec C_ECC_NCER, 1993-05-12,  GDH ,  USGS ,  ASHTECH,  107 ,  LM-XII3 6M24,  ASH700228D,  *031,  NONE, 1.2623, 1.311, 30, 3030
 chec C_ECC_NCER, 1993-11-18,  JMS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 1.3448, 1.3927, 30, 1260
 chec C_ECC_NCER, 2001-05-30,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1771, 1.2267, 30, 10
 chec C_ECC_NCER, 2001-05-31,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1771, 1.2267, 30, 10
 chec C_ECC_NCER, 2003-04-23,  JMS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.343, 1.3909, 30, 10
 chec C_ECC_NCER, 2005-11-16,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.5184, 0.5848, 30, 0
 chec C_ECC_NCER, 2005-11-17,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.5184, 0.5848, 30, 0
 chec C_ECC_NCER, 2005-11-18,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR620022602,  NONE, 0.5184, 0.5848, 30, 0
 chec C_ECC_NCER, 2006-05-24,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 1840
 chec C_ECC_NCER, 2006-05-25,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 0
 chec C_ECC_NCER, 2006-05-26,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 0
 chec C_ECC_NCER, 2006-05-27,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 0
 chec C_ECC_NCER, 2006-05-28,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 0
 chec C_ECC_NCER, 2006-05-29,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 0
 chec C_ECC_NCER, 2006-05-30,  GDH ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 1.246, 1.2949, 30, 0
 chec C_ECC_NCER, 2009-05-05,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII 1L001,  ASH701945E_M,  CR620022601,  NONE, 0.8038, 0.8598, 30, 1750
 chec C_ECC_NCER, 2009-05-06,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII 1L001,  ASH701945E_M,  CR620022601,  NONE, 0.8038, 0.8598, 30, 30
 chec C_ECC_NCER, 2009-05-07,  JMS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII 1L001,  ASH701945E_M,  CR620022601,  NONE, 0.8038, 0.8598, 30, 30