PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/05-07:58:00
G01     41.5           16.7                2.5 +/-    1.74       5.9 +/-    1.74  0.050 / 0.060
G06     178.8          34.9                6.5 +/-    0.87      10.3 +/-    0.87  0.040 / 0.080
G13     239.5          22.4                5.7 +/-    1.36      11.8 +/-    1.36  0.140 / 0.230
G15     270.9          12.7                4.1 +/-    1.14      10.8 +/-    1.14  0.250 / 0.340
G17     3.8            70.0                4.3 +/-    0.33       4.5 +/-    0.33  0.030 / 0.020
G19     279.5          70.0                4.5 +/-    0.82       4.8 +/-    0.82  0.030 / 0.020
G24     317.3          17.7                3.4 +/-    1.69       8.0 +/-    1.69  0.300 / 0.160
G28     71.8           46.5                3.8 +/-    1.32       5.0 +/-    1.32  0.160 / 0.130
G30     154.0          26.9                4.7 +/-    0.67       8.8 +/-    0.67  0.190 / 0.200