PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-06:28:00
G01     82.3           33.0                5.5 +/-    0.68       9.1 +/-    0.68  0.030 / 0.030
G07     131.1          37.9                8.0 +/-    0.39      12.1 +/-    0.39  0.030 / 0.030
G11     60.0           35.6                5.0 +/-    0.81       7.9 +/-    0.81  0.040 / 0.040
G13     286.2          37.9                5.8 +/-    1.20       8.7 +/-    1.20  0.040 / 0.030
G15     312.4          11.2                2.5 +/-    2.02       6.7 +/-    2.02  0.090 / 0.130
G17     219.7          63.0                7.6 +/-    0.52       8.4 +/-    0.52  0.090 / 0.110
G19     217.8          30.5                6.7 +/-    1.40      11.7 +/-    1.40  0.040 / 0.060
G28     358.2          61.4                5.2 +/-    1.11       5.9 +/-    1.11  0.030 / 0.070
G30     120.7          72.6                8.3 +/-    1.08       8.7 +/-    1.08  0.040 / 0.070