PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-02:42:40
G08     310.1          18.7                8.9 +/-    1.59      20.1 +/-    1.59  0.080 / 0.090
G10     330.7          59.8               10.0 +/-    0.56      11.4 +/-    0.56  0.070 / 0.100
G14     217.9          27.9               16.6 +/-    0.81      30.4 +/-    0.81  0.100 / 0.210
G15     46.7           13.3                5.4 +/-    1.76      14.0 +/-    1.76  0.090 / 0.270
G20     355.4          64.9               13.6 +/-    0.79      14.9 +/-    0.79  0.040 / 0.050
G21     133.5          58.8               13.7 +/-    0.92      15.7 +/-    0.92  0.040 / 0.060
G24     73.5           29.5               10.1 +/-    0.41      17.8 +/-    0.41  0.060 / 0.110
G27     276.0          37.5               13.3 +/-    1.02      20.2 +/-    1.02  0.070 / 0.090
G32     222.6          53.5               14.9 +/-    1.53      18.0 +/-    1.53  0.040 / 0.040