benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 knee Kneeland_1932_USGS, 1993-08-19,  KWC ,  USGS ,  ASHTECH LM-XII3,  765,  7A26,  ASH700228D,  1058,  NONE, 1.3076, 1.3558, 30, 211630
 knee, 1994-04-22,  Steve Holdorff ,  National Geodetic Su,  TRIMBLE 4000,  1571,  SSE,  TRM14532.00,  747,  NONE, 2.22, 0, 15, 212645
 knee, 1994-04-26,  Steve Holdorff ,  National Geodetic Su,  TRIMBLE 4000,  1571,  SSE,  TRM14532.00,  747,  NONE, 1.2913, 0, 15, 162645
 knee Kneeland_1932_2672_US, 2000-11-05,  TBW ,  Humboldt_State_Univ ,  TRIMBLE 4000SSI,  24489,  NP,  TRM22020.00+GP,  66922,  NONE, 1.1768, 0, 15, 15
 knee Kneeland_1932_USGS, 1992-06-13,  KWC ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 7A24,  ASH700228D,  1068,  NONE, 1.4885, 1.5352, 30, 280
 knee Kneeland_1932_2672_U, 2001-07-17,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.3217, 1.3698, 30, 154830
 knee Kneeland_1932_2672_U, 2001-07-18,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.3217, 1.3698, 30, 10
 knee Kneeland_1932_2672_U, 2001-07-19,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.3217, 1.3698, 30, 10
 knee Kneeland_1932_2672_U, 2001-07-20,  JMS ,   ,  ASHTECH,  lp019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14329,  NONE, 1.3217, 1.3698, 30, 10
 knee Kneeland_1932_2672_U, 2004-07-22,  GDH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2177, 1.2669, 30, 30
 knee Kneeland_1932_2672_U, 2004-07-23,  GDH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2177, 1.2669, 30, 30
 knee Kneeland_1932_2672_U, 2004-07-24,  GDH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.2177, 1.2669, 30, 30
 knee Kneeland_1932_2672_U, 2005-06-22,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.5289, 0.5948, 30, 0
 knee Kneeland_1932_2672_U, 2005-06-23,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.5289, 0.5948, 30, 0
 knee Kneeland_1932_2672_U, 2005-06-24,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 0.5289, 0.5948, 30, 0