PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/25-07:27:50
G01     106.6          25.7                3.3 +/-    0.80       6.4 +/-    0.80  0.030 / 0.030
G07     108.4          56.6                4.3 +/-    0.46       5.1 +/-    0.46  0.030 / 0.030
G08     41.5           17.7                1.2 +/-    0.67       2.8 +/-    0.67  0.040 / 0.050
G11     86.2           42.5                4.7 +/-    0.44       6.6 +/-    0.44  0.030 / 0.050
G13     309.0          29.3                2.3 +/-    1.60       4.0 +/-    1.60  0.080 / 0.130
G17     205.1          40.6                5.4 +/-    1.14       7.8 +/-    1.14  0.070 / 0.140
G18     77.6           23.8                2.7 +/-    0.91       5.4 +/-    0.91  0.090 / 0.150
G28     315.8          60.6                4.0 +/-    0.40       4.5 +/-    0.40  0.080 / 0.170
G30     16.5           78.0                5.0 +/-    0.58       5.1 +/-    0.58  0.080 / 0.200