PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-02:27:50
G08     319.4          12.4                6.3 +/-    2.20      16.7 +/-    2.20  0.090 / 0.150
G10     304.3          53.6                8.0 +/-    1.01       9.7 +/-    1.01  0.060 / 0.120
G14     211.6          18.5                9.8 +/-    1.96      22.4 +/-    1.96  0.100 / 0.730
G15     45.8           25.9                7.3 +/-    0.80      14.0 +/-    0.80  0.110 / 0.490
G18     6.4            65.2                8.4 +/-    0.57       9.2 +/-    0.57  0.030 / 0.040
G20     75.7           13.3                7.2 +/-    1.13      18.7 +/-    1.13  0.030 / 0.040
G21     110.7          70.5               10.5 +/-    0.82      11.1 +/-    0.82  0.040 / 0.050
G24     93.2           28.4               10.7 +/-    1.12      19.3 +/-    1.12  0.040 / 0.040
G27     292.4          36.9                9.6 +/-    1.05      14.7 +/-    1.05  0.070 / 0.080
G32     213.5          36.5               10.0 +/-    1.50      15.5 +/-    1.50  0.060 / 0.080