PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-08:57:40
G08     316.7          13.8                3.4 +/-    2.05       8.7 +/-    2.05  0.210 / 0.220
G10     322.0          58.2                4.7 +/-    0.58       5.5 +/-    0.58  0.260 / 0.280
G14     216.1          22.6                6.0 +/-    1.56      12.4 +/-    1.56  0.060 / 0.070
G15     46.1           14.2                1.7 +/-    1.37       4.4 +/-    1.37  0.060 / 0.060
G20     70.1           33.9                3.4 +/-    1.45       5.4 +/-    1.45  0.090 / 0.090
G21     128.5          61.7                6.2 +/-    0.30       6.9 +/-    0.30  0.070 / 0.090
G24     80.1           30.1                5.9 +/-    1.46      10.3 +/-    1.46  0.040 / 0.030
G27     280.8          37.9                5.8 +/-    1.43       8.7 +/-    1.43  0.040 / 0.040
G32     219.1          48.9                7.2 +/-    1.43       9.1 +/-    1.43  0.080 / 0.090