benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 maso Mason_1942_USC&GS, 1992-04-14,  WKG ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 6A,  ASH700228D,  1068,  NONE, 1.2352, 1.2842, 30, 2210
 maso Mason_1942_USC&GS, 1993-05-09,  JMS ,  USGS ,  ASHTECH,  762 ,  LM-XII3 6M24,  ASH700228A,  0745,  NONE, 1.21, 1.2593, 30, 3030
 maso Mason_1942_USC&GS, 1993-05-10,  GDH ,  USGS ,  ASHTECH,  762 ,  LM-XII3 6M24,  ASH700228A,  0745,  NONE, 1.21, 1.2593, 30, 3030
 maso Mason_1942_USC&GS, 1993-11-17,  WKG ,  USGS ,  ASHTECH,  99 ,  LM-XII3 7A,  ASH700228D,  1036,  NONE, 1.1728, 1.2225, 30, 930
 maso Mason_1942_USC&GS, 1996-05-13,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1F00,  ASH700228A,  0598,  NONE, 1.1849, 1.2345, 30, 15420
 maso Mason_1942_USC&GS, 1996-05-14,  GDH ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1F00,  ASH700228A,  0598,  NONE, 1.1849, 1.2345, 30, 30
 maso Mason_1942_USC&GS, 2001-05-17,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1923, 1.2418, 30, 10
 maso Mason_1942_USC&GS, 2001-05-18,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1923, 1.2418, 30, 10
 maso Mason_1942_USC&GS, 2001-05-19,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1923, 1.2418, 30, 10
 maso Mason_1942_USC&GS, 2001-05-20,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1923, 1.2418, 30, 10
 maso Mason_1942_USC&GS, 2001-05-21,  GDH ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945.02B,  CR619992801,  NONE, 1.1923, 1.2418, 30, 10
 maso Mason_1942_USC&GS, 2003-04-02,  CHS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.1985, 1.2479, 30, 10
 maso Mason_1942_USC&GS, 2003-04-03,  CHS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.1985, 1.2479, 30, 10