PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-20:12:40
G02     54.1           38.0               13.7 +/-    0.70      20.5 +/-    0.70  0.030 / 0.060
G05     77.2           69.9               16.2 +/-    0.52      17.1 +/-    0.52  0.040 / 0.060
G12     186.1          38.1               17.2 +/-    1.29      25.9 +/-    1.29  0.100 / 0.310
G13     134.1          11.3               18.6 +/-   15.95      50.4 +/-   15.95  0.120 / 0.400
G20     204.4          54.9               18.0 +/-    0.45      21.5 +/-    0.45  0.080 / 0.090
G21     266.8          14.4               16.7 +/-    2.44      42.0 +/-    2.44  0.090 / 0.080
G25     238.2          54.9               17.5 +/-    1.34      20.8 +/-    1.34  0.030 / 0.050
G29     326.7          52.1               14.7 +/-    0.83      18.1 +/-    0.83  0.030 / 0.050