PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-02:58:00
G01     88.0           32.3                5.2 +/-    1.25       8.6 +/-    1.25  0.050 / 0.040
G07     127.1          43.9                6.9 +/-    0.42       9.4 +/-    0.42  0.050 / 0.030
G11     68.5           39.9                4.6 +/-    1.33       6.7 +/-    1.33  0.090 / 0.240
G13     293.5          35.9                4.5 +/-    2.82       7.0 +/-    2.82  0.360 / 0.330
G15     313.5          11.4                2.5 +/-    2.61       6.9 +/-    2.61  0.040 / 0.040
G17     216.2          55.0                6.6 +/-    0.84       7.9 +/-    0.84  0.040 / 0.050
G19     215.5          29.5                6.3 +/-    2.70      11.2 +/-    2.70  0.050 / 0.050
G28     354.3          61.5                3.9 +/-    0.90       4.3 +/-    0.90  0.050 / 0.040
G30     113.5          71.2                5.1 +/-    0.48       5.4 +/-    0.48  0.110 / 0.110