benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 m377 M377_1984_NGS, 2012-08-09,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.7453, 0.8029, 15, 15280
 m377 M377_1984_NGS, 2012-08-10,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.7453, 0.8029, 15, 0
 m377 M377_1984_NGS, 2012-08-11,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.7453, 0.8029, 15, 0
 m377 M377_1984_NGS, 2012-08-12,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.7453, 0.8029, 15, 0
 m377 M377_1984_NGS, 2015-07-08,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.8315, 0.8869, 15, 182915
 m377 M377_1984_NGS, 2015-07-09,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.8315, 0.8869, 15, 0
 m377 M377_1984_NGS, 2015-07-10,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.8315, 0.8869, 15, 0
 m377 M377_1984_NGS, 2015-07-11,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.8315, 0.8869, 15, 0
 m377 M377_1984_NGS, 2015-07-12,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.8315, 0.8869, 15, 0
 m377 M377_1984_NGS, 2015-07-13,  JLS ,  USGS ,  JAVAD,  00618 ,  TRE_G3TH SIGMA3.3.1,  ASH700936D_M,  CR14333,  NONE, 0.8315, 0.8869, 15, 0
 m377 M377_1984_NGS, 2017-07-12,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.813, 0.8689, 15, 173615
 m377 M377_1984_NGS, 2017-07-13,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.813, 0.8689, 15, 0
 m377 M377_1984_NGS, 2017-07-14,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.813, 0.8689, 15, 0
 m377 M377_1984_NGS, 2017-07-15,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 0.813, 0.8689, 15, 0