benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 crat Crater_1992_NCER, 1998-07-21,  GDH ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 1F50,  ASH700936D_M,  CR14333,  NONE, 1.4821, 1.5288, 30, 15130
 crat Crater_1992_NCER, 1998-07-22,  GDH ,  USGS ,  ASHTECH,  O4591 ,  Z-XII3 1F50,  ASH700936D_M,  CR14333,  NONE, 1.4821, 1.5288, 30, 30
 crat Crater_1992_NCER, 1999-07-20,  ASH ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992804,  NONE, 1.3964, 1.4438, 30, 145130
 crat Crater_1992_NCER, 1999-07-21,  ASH ,   ,  ASHTECH,  O4579 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992804,  NONE, 1.3964, 1.4438, 30, 130
 crat Crater_1992_NCER, 2002-07-10,  CHS ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 1.4116, 1.4589, 30, 14400
 crat Crater_1992_NCER, 2002-07-11,  CHS ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 1.4116, 1.4589, 30, 10
 crat Crater_1992_NCER, 2005-07-20,  CHS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR620022601,  NONE, 1.2966, 1.3449, 30, 171630
 crat Crater_1992_NCER, 2005-07-21,  CHS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR620022601,  NONE, 1.2966, 1.3449, 30, 30
 crat Crater_1992_NCER, 2005-07-22,  CHS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR620022601,  NONE, 1.2966, 1.3449, 30, 30
 crat Crater_1992_NCER, 2005-07-23,  CHS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945E_M,  CR620022601,  NONE, 1.2966, 1.3449, 30, 30
 crat Crater_1992_NCER, 2007-07-11,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.5094, 1.5559, 30, 18030
 crat Crater_1992_NCER, 2007-07-12,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.5094, 1.5559, 30, 0
 crat Crater_1992_NCER, 2007-07-13,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.5094, 1.5559, 30, 0
 crat Crater_1992_NCER, 2007-07-14,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH701945B_M,  CR519993706,  NONE, 1.5094, 1.5559, 30, 0