benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 caml caml_1990_NCER, 1992-02-11,  WKG ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 6A,  ASH700228D,  1068,  NONE, 1.4152, 1.4624, 30, 75930
 caml caml_1990_NCER, 1993-01-13,  WKG ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 6M24,  ASH700228D,  1068,  NONE, 1.4563, 1.5032, 30, 122530
 caml caml_1990_NCER, 1994-04-18,  KJW ,  USGS ,  ASHTECH,  764 ,  LM-XII3 7A,  ASH700228A,  0598,  NONE, 1.196, 1.2454, 30, 134430
 caml caml_1990_NCER, 1995-09-22,  JMS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E00,  ASH700228D,  1068,  NONE, 1.4483, 1.4953, 30, 15360
 caml caml_1990_NCER, 1996-10-31,  GDH ,  USGS ,  ASHTECH,  707 ,  Z-XII3 1F00,  ASH700718B,  11404,  NONE, 1.1662, 1.216, 30, 163730
 caml caml_1990_NCER, 1997-11-20,  JMS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936D_M,  CR14341,  NONE, 1.4781, 1.5248, 30, 16410
 caml caml_1990_NCER, 1997-12-04,  CHS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 1E95,  ASH700936D_M,  CR14329,  NONE, 1.3732, 1.4208, 30, 16340
 caml caml_1990_NCER, 1998-12-09,  GDH ,  USGS ,  ASHTECH,  LP03362 ,  Z-XII3 CB00,  ASH700936D_M,  CR14341,  NONE, 1.2863, 1.3348, 30, 165930
 caml caml_1990_NCER, 1998-12-10,  CHS ,  USGS ,  ASHTECH,  O4582 ,  Z-XII3 CB00,  ASH700936D_M,  CR14330,  NONE, 1.4236, 1.4708, 30, 15450
 caml caml_1990_NCER, 2001-01-16,  JMS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.5032, 1.5498, 30, 174230
 caml caml_1990_NCER, 2001-01-17,  CHS ,   ,  ASHTECH,  801 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.3641, 1.4118, 30, 164230
 caml caml_1990_NCER, 2003-02-06,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZC00,  ASH701945B_M,  CR619992801,  NONE, 1.241, 1.2899, 30, 16460
 caml caml_1990_NCER, 2003-02-10,  CHS ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH700936D_M,  CR14330,  NONE, 1.5104, 1.5569, 30, 16290
 caml caml_1990_NCER, 2006-02-08,  JMS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.4409, 1.4879, 30, 171630
 caml caml_1990_NCER, 2006-02-15,  CHS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022602,  NONE, 1.3692, 1.4168, 30, 16420
 caml caml_1990_NCER, 2009-03-11,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 1.3642, 1.4119, 30, 16130
 caml caml_1990_NCER, 2009-03-12,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 1.4812, 1.5279, 30, 15300
 caml caml_1990_NCER, 2014-09-03,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 1.3168, 1.3649, 15, 184215
 caml caml_1990_NCER, 2014-09-04,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 1.3168, 1.3649, 15, 0
 caml caml_1990_NCER, 2014-09-05,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 1.3168, 1.3649, 15, 0
 caml caml_1990_NCER, 2014-09-06,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 1.3168, 1.3649, 15, 0
 caml caml_1990_NCER, 2014-09-07,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 1.3168, 1.3649, 15, 0
 caml caml_1990_NCER, 2014-09-08,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14329,  NONE, 1.3168, 1.3649, 15, 0