PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/25-09:57:40
G01     57.8           29.5                2.1 +/-    0.75       3.8 +/-    0.75  0.080 / 0.210
G06     181.3          15.2                7.6 +/-    3.64      18.7 +/-    3.64  0.080 / 0.260
G07     143.1          18.9                5.8 +/-    1.39      13.1 +/-    1.39  0.030 / 0.060
G11     47.1           20.8                1.4 +/-    1.10       3.0 +/-    1.10  0.030 / 0.060
G13     262.0          34.1                6.0 +/-    2.27       9.7 +/-    2.27  0.030 / 0.030
G15     292.1          16.5                4.9 +/-    1.61      11.7 +/-    1.61  0.030 / 0.030
G17     277.2          79.2                4.2 +/-    0.83       4.3 +/-    0.83  0.070 / 0.210
G19     235.9          54.6                5.7 +/-    0.89       6.8 +/-    0.89  0.080 / 0.230
G28     40.3           55.6                2.8 +/-    0.44       3.3 +/-    0.44  0.160 / 0.330
G30     144.8          50.3                5.3 +/-    0.88       6.6 +/-    0.88  0.200 / 0.280