benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 a220 A220_stmpd_H181_1932_, 1992-10-06,   ,   ,  TURBOROGUE REC,  142,  #,  AOAD/M_T,  142,  NONE, 0.9266, 0, 30, 16200
 a220 A220_stmpd_H181_1932_, 1996-09-18,  KAS ,  USGS ,  ASHTECH Z-XII3,  O4597,  1F00,  ASH700228A,  0598,  NONE, 1.2785, 1.327, 30, 15160
 a220 A220_stmpd_H181_1932_, 1998-09-16,  CHS ,  USGS ,  ASHTECH Z-XII3,  LP03362,  CB00,  ASH700936D_M,  CR14329,  NONE, 1.3843, 1.4318, 30, 155130
 a220 A220_stmpd_H181_1932_, 2002-09-09,  TJW ,  USGS MENLO PARK ,  TRIMBLE 4000SSI,  4005A27619,  NP,  TRM22020.00+GP,  0080053858,  NONE, 1.213, 0, 30, 155830