PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/08-13:27:40
G08     319.1          12.1                3.3 +/-    1.92       8.7 +/-    1.92  0.110 / 0.520
G10     311.9          55.8                0.8 +/-    0.72       0.9 +/-    0.72  0.110 / 0.490
G14     213.6          19.6                3.0 +/-    1.96       6.7 +/-    1.96  0.050 / 0.060
G15     45.5           18.2                2.0 +/-    0.64       4.5 +/-    0.64  0.050 / 0.070
G20     76.7           16.3                3.3 +/-    1.45       7.8 +/-    1.45  0.120 / 0.420
G21     121.2          64.2                4.2 +/-    0.66       4.6 +/-    0.66  0.150 / 0.310
G24     87.5           29.5                3.9 +/-    0.76       6.8 +/-    0.76  0.030 / 0.050
G27     287.6          37.6                2.8 +/-    0.87       4.2 +/-    0.87  0.030 / 0.040
G32     215.6          42.2                4.2 +/-    2.17       5.9 +/-    2.17  0.030 / 0.040