PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-07:27:50
G01     42.8           18.4                2.3 +/-    2.70       5.3 +/-    2.70  0.040 / 0.060
G06     179.5          32.0                5.8 +/-    1.61       9.7 +/-    1.61  0.040 / 0.050
G13     241.6          24.0                7.5 +/-    1.77      15.0 +/-    1.77  0.120 / 0.200
G15     273.1          13.5                5.3 +/-    1.05      13.7 +/-    1.05  0.080 / 0.210
G17     358.1          72.0                3.5 +/-    0.33       3.6 +/-    0.33  0.030 / 0.020
G19     272.1          68.7                4.3 +/-    0.73       4.5 +/-    0.73  0.030 / 0.020
G24     317.9          15.7                1.9 +/-    3.48       4.6 +/-    3.48  0.180 / 0.330
G28     68.6           47.7                3.8 +/-    1.54       4.9 +/-    1.54  0.200 / 0.230
G30     153.2          29.1                5.3 +/-    1.77       9.4 +/-    1.77  0.150 / 0.250