benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 serp, 2003-06-03,  -Unknown- ,  -Unknown- ,  TRIMBLE 5700,  220297246,  NP,  TRM41249.00,  00000000,  NONE, 0.55, 0.6181, 30, 231530
 serp, 2003-06-04,  -Unknown- ,  -Unknown- ,  TRIMBLE 5700,  220297246,  NP,  TRM41249.00,  00000000,  NONE, 0.55, 0.6181, 30, 231530
 serp, 2003-06-05,  -Unknown- ,  -Unknown- ,  TRIMBLE 5700,  220297246,  NP,  TRM41249.00,  00000000,  NONE, 0.55, 0.6181, 30, 231530
 serp, 2004-12-07,  Sarah Titus & Shylar,  UW-Madison ,  TRIMBLE 5700,  0220298298,  NP,  TRM41249.00,  12369018,  NONE, 0.55, 0.6181, 30, 0
 serp, 2004-12-08,  Sarah Titus & Shylar,  UW-Madison ,  TRIMBLE 5700,  0220298298,  NP,  TRM41249.00,  12369018,  NONE, 0.55, 0.6181, 30, 0
 serp, 2004-12-09,  Sarah Titus & Shylar,  UW-Madison ,  TRIMBLE 5700,  0220298298,  NP,  TRM41249.00,  12369018,  NONE, 0.55, 0.6181, 30, 0
 serp, 2004-12-10,  Sarah Titus & Shylar,  UW-Madison ,  TRIMBLE 5700,  0220298298,  NP,  TRM41249.00,  12369018,  NONE, 0.55, 0.6181, 30, 0
 serp, 2017-09-28,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7884, 0.8448, 15, 164345
 serp, 2017-09-29,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7884, 0.8448, 15, 0
 serp, 2018-11-16,  JLS ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.7833, 0.8399, 15, 17450
 serp, 2018-11-17,  JLS ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.7833, 0.8399, 15, 0
 serp, 2018-11-18,  JLS ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.7833, 0.8399, 15, 0
 serp, 2021-04-20,  JLS ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.7.6,  ASH700936D_M,  CR14244,  NONE, 0.7782, 0.8349, 15, 17745
 serp, 2021-04-21,  JLS ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.7.6,  ASH700936D_M,  CR14244,  NONE, 0.7782, 0.8349, 15, 0
 serp, 2021-04-22,  JLS ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.7.6,  ASH700936D_M,  CR14244,  NONE, 0.7782, 0.8349, 15, 0
 serp, 2022-07-16,  JLS ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.7.6,  ASH701945B_M,  CR619992805,  NONE, 0.7956, 0.8518, 15, 16215
 serp, 2022-07-17,  JLS ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.7.6,  ASH701945B_M,  CR619992805,  NONE, 0.7956, 0.8518, 15, 0
 serp, 2022-07-18,  JLS ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.7.6,  ASH701945B_M,  CR619992805,  NONE, 0.7956, 0.8518, 15, 0