PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-09:43:10
G03     241.0          67.1                5.5 +/-    0.53       5.9 +/-    0.53  0.050 / 0.070
G07     249.5          11.0               -1.3 +/-   18.83      -3.7 +/-   18.83  0.050 / 0.060
G09     305.1          21.2                5.4 +/-    5.79      11.5 +/-    5.79  0.040 / 0.040
G14     101.9          11.7                7.9 +/-   13.12      21.3 +/-   13.12  0.040 / 0.040
G16     125.1          60.5                8.3 +/-    0.65       9.4 +/-    0.65  0.030 / 0.050
G22     191.7          53.2                7.0 +/-    1.70       8.5 +/-    1.70  0.030 / 0.050
G23     319.6          49.2                3.4 +/-    1.11       4.3 +/-    1.11  0.150 / 0.250
G26     67.9           51.8              -46.7 +/-   78.89     -57.7 +/-   78.89  0.110 / 0.230
G31     52.9           18.3                4.2 +/-    5.62       9.6 +/-    5.62  0.050 / 0.050