benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 ceme, 1999-09-11,  CWW ,   ,  ASHTECH,  174 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 1.3116, 1.3598, 30, 155230
 ceme, 1999-09-27,  CWW ,   ,  ASHTECH,  174 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 1.1964, 1.2458, 30, 155230
 ceme Ceme_USGS_plug, 2003-06-27,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.4727, 0.5418, 30, 145730
 ceme Ceme_USGS_plug, 2003-06-28,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.4727, 0.5418, 30, 0
 ceme Ceme_USGS_plug, 2003-06-29,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.4727, 0.5418, 30, 0
 ceme Ceme_USGS_plug, 2008-09-12,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE21,  ASH701945E_M,  CR520031622,  NONE, 0.7391, 0.7969, 30, 0
 ceme Ceme_USGS_plug, 2008-09-13,  GDH ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE21,  ASH701945E_M,  CR520031622,  NONE, 0.7391, 0.7969, 30, 0
 ceme Ceme_USGS_plug, 2012-12-03,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.6107, 0.6729, 15, 0
 ceme Ceme_USGS_plug, 2012-12-04,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.6107, 0.6729, 15, 0
 ceme Ceme_USGS_plug, 2012-12-05,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.6107, 0.6729, 15, 0