benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 whal Whale_unstamped_1990, 1992-02-19,  JMS ,  USGS ,  ASHTECH,  99 ,  LM-XII3 6A,  ASH700228D,  1036,  NONE, 1.202, 1.2513, 30, 6100
 whal Whale_unstamped_1990, 1993-01-19,  JMS ,  USGS ,  ASHTECH,  107 ,  LM-XII3 6M24,  ASH700228D,  *031,  NONE, 1.2382, 1.2872, 30, 12030
 whal Whale_unstamped_1990, 1994-04-25,  JMS ,  USGS ,  ASHTECH,  765 ,  LM-XII3 7A,  ASH700228D,  1058,  NONE, 1.2976, 1.3459, 30, 14170
 whal Whale_unstamped_1990, 1995-06-26,  JMS ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 1E00,  ASH700228A,  0745,  NONE, 1.3026, 1.3509, 30, 16390
 whal Whale_unstamped_1990, 1996-06-05,  JMS ,  USGS ,  ASHTECH,  707 ,  Z-XII3 1F00,  ASH700718B,  11404,  NONE, 1.3177, 1.3658, 30, 1650
 whal Whale_unstamped_1990, 1997-12-10,  JMS ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 1E95,  ASH700936D_M,  CR14341,  NONE, 1.3217, 1.3698, 30, 18130
 whal Whale_unstamped_1990, 1997-12-11,  JMS ,  USGS ,  ASHTECH,  O4579 ,  Z-XII3 1E95,  ASH700936D_M,  CR14341,  NONE, 1.357, 1.4048, 30, 171730
 whal Whale_unstamped_1990, 1999-01-11,  JMS ,  USGS ,  ASHTECH,  LP03362 ,  Z-XII3 CB00,  ASH700936E_C,  CR16980,  NONE, 1.3368, 1.3848, 30, 173830
 whal Whale_unstamped_1990, 1999-01-12,  JMS ,  USGS ,  ASHTECH,  LP03362 ,  Z-XII3 CB00,  ASH700936E_C,  CR16980,  NONE, 1.3722, 1.4198, 30, 16380
 whal Whale_unstamped_1990, 2001-01-29,  JMS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.3267, 1.3748, 30, 17830
 whal Whale_unstamped_1990, 2001-01-30,  JMS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH700936D_M,  CR14329,  NONE, 1.3076, 1.3558, 30, 174030
 whal Whale_unstamped_1990, 2004-05-04,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE00,  ASH701945E_M,  CR520031622,  NONE, 1.4076, 1.4549, 30, 162330
 whal Whale_unstamped_1990, 2005-03-10,  JMS ,  USGS ,  ASHTECH,  ZE1200331017 ,  Z-X ZE21,  ASH701945B_M,  CR519993703,  NONE, 1.3178, 1.3659, 30, 1730
 whal Whale_unstamped_1990, 2008-02-06,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR520031622,  NONE, 0.4502, 0.5208, 30, 172130
 whal Whale_unstamped_1990, 2008-02-07,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE21,  ASH701945E_M,  CR520031622,  NONE, 0.4898, 0.5579, 30, 17180
 whal Whale_unstamped_1990, 2014-07-01,  ELP ,  USGS ,  JAVAD,  00619 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 1.3592, 1.4069, 15, 162215
 whal Whale_unstamped_1990, 2014-07-10,  JLS ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 1.1934, 1.2428, 15, 153315
 whal Whale_unstamped_1990, 2020-09-30,  ELP ,  USGS ,  JAVAD,  00620 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  01599,  NONE, 1.2955, 1.3439, 15, 153745
 whal Whale_unstamped_1990, 2020-10-05,  ELP ,  USGS ,  JAVAD,  00620 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  01599,  NONE, 1.3592, 1.4069, 15, 15320