PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-13:27:50
G01     65.3           32.0                6.7 +/-    1.64      11.4 +/-    1.64  0.040 / 0.030
G07     140.0          26.5                6.9 +/-    0.73      13.0 +/-    0.73  0.040 / 0.030
G11     50.0           26.3                5.2 +/-    1.84       9.9 +/-    1.84  0.060 / 0.090
G13     268.0          36.8                5.7 +/-    1.73       8.7 +/-    1.73  0.050 / 0.090
G15     301.5          14.3                3.1 +/-    1.06       7.8 +/-    1.06  0.100 / 0.100
G17     245.6          74.6                8.5 +/-    0.25       8.8 +/-    0.25  0.080 / 0.080
G18     45.1           15.2                5.7 +/-    1.73      14.2 +/-    1.73  0.090 / 0.070
G19     227.6          42.7                7.7 +/-    1.93      10.7 +/-    1.93  0.060 / 0.080
G28     27.4           58.2                5.1 +/-    1.33       5.9 +/-    1.33  0.110 / 0.310
G30     140.3          58.9                7.3 +/-    0.32       8.4 +/-    0.32  0.110 / 0.220