PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-11:12:40
G01     41.7           17.0                2.0 +/-    0.94       4.8 +/-    0.94  0.050 / 0.070
G06     177.0          36.3                5.9 +/-    1.21       9.1 +/-    1.21  0.040 / 0.080
G13     240.4          22.8                3.6 +/-    1.49       7.4 +/-    1.49  0.040 / 0.030
G15     272.3          12.8                4.6 +/-    2.14      12.1 +/-    2.14  0.040 / 0.040
G17     5.2            69.9                5.0 +/-    0.51       5.2 +/-    0.51  0.150 / 0.240
G19     278.6          70.1                4.1 +/-    0.75       4.4 +/-    0.75  0.130 / 0.170
G24     317.5          17.0                3.7 +/-    2.26       8.9 +/-    2.26  0.100 / 0.200
G28     71.0           46.9                2.3 +/-    0.67       3.0 +/-    0.67  0.110 / 0.200
G30     154.3          29.1                5.3 +/-    1.15       9.5 +/-    1.15  0.060 / 0.070