benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 schl Schoolhouse_Pk_1932_U, 1993-08-20,  GDH ,  USGS ,  ASHTECH LM-XII3,  99,  7A,  ASH700228D,  1036,  NONE, 1.5407, 1.587, 30, 212230
 schl Schoolhouse_Pk_1932_, 1992-05-07,  WKG ,  USGS ,  ASHTECH,  99 ,  LM-XII3 6A,  ASH700228D,  1036,  NONE, 1.3438, 1.3917, 30, 14530
 schl Schoolhouse_Pk_1932_, 1992-05-09,  JMS ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 6A,  ASH700228D,  1068,  NONE, 1.1688, 1.2186, 30, 1260
 schl Schoolhouse_Pk_1932_, 1994-08-22,  JMS ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.2523, 1.3011, 30, 19570
 schl Schoolhouse_Pk_1932_, 1994-09-14,  JMS ,  USGS ,  ASHTECH,  104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.2674, 1.316, 30, 16330
 schl Schoolhouse_Pk_1932_, 2001-07-15,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3944, 1.4418, 30, 18310
 schl Schoolhouse_Pk_1932_, 2001-07-16,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3944, 1.4418, 30, 10
 schl Schoolhouse_Pk_1932_, 2001-07-17,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3944, 1.4418, 30, 10
 schl Schoolhouse_Pk_1932_, 2001-07-18,  CHS ,   ,  ASHTECH,  lp019992803 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993702,  NONE, 1.3944, 1.4418, 30, 10
 schl Schoolhouse_Pk_1932_, 2005-06-22,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-23,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-24,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-25,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-26,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-27,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-28,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0
 schl Schoolhouse_Pk_1932_, 2005-06-29,  GDH ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH700936D_M,  CR14244,  NONE, 1.1205, 1.1708, 30, 0