PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-02:58:00
G08     270.1          20.0                5.9 +/-    2.93      13.0 +/-    2.93  0.120 / 0.260
G10     50.4           60.8                6.6 +/-    0.78       7.4 +/-    0.78  0.110 / 0.310
G11     313.1          16.0                7.9 +/-    2.86      19.2 +/-    2.86  0.090 / 0.240
G14     259.4          64.9                5.8 +/-    0.64       6.3 +/-    0.64  0.110 / 0.190
G18     86.5           40.2                6.2 +/-    1.15       9.0 +/-    1.15  0.030 / 0.040
G21     153.2          19.4                6.8 +/-    2.38      15.2 +/-    2.38  0.020 / 0.030
G24     42.4           14.8                5.2 +/-    1.54      13.0 +/-    1.54  0.100 / 0.230
G27     233.9          18.6               10.4 +/-    1.26      23.6 +/-    1.26  0.100 / 0.290
G31     179.8          24.9                8.1 +/-    2.11      15.9 +/-    2.11  0.040 / 0.080
G32     313.1          75.4                7.1 +/-    0.52       7.3 +/-    0.52  0.040 / 0.070