PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-10:27:50
G08     276.2          19.1                4.9 +/-    1.22      11.0 +/-    1.22  0.040 / 0.070
G10     51.7           60.3                5.0 +/-    0.31       5.6 +/-    0.31  0.040 / 0.060
G11     315.5          12.6                4.2 +/-    1.99      11.0 +/-    1.99  0.090 / 0.230
G14     253.9          59.7                6.4 +/-    0.59       7.3 +/-    0.59  0.140 / 0.260
G18     314.8          26.8                4.0 +/-    0.62       7.5 +/-    0.62  0.030 / 0.030
G21     153.7          19.7                4.9 +/-    1.25      10.9 +/-    1.25  0.030 / 0.030
G24     41.8           13.5                1.4 +/-    0.84       3.7 +/-    0.84  0.080 / 0.160
G27     234.9          18.8                5.5 +/-    0.91      12.4 +/-    0.91  0.080 / 0.140
G31     177.9          27.1                4.6 +/-    1.26       8.5 +/-    1.26  0.170 / 0.370
G32     327.6          75.8                6.1 +/-    0.63       6.3 +/-    0.63  0.140 / 0.360