PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-09:12:40
G01     39.5           13.4                2.2 +/-    0.90       5.7 +/-    0.90  0.040 / 0.080
G02     199.1          12.5                5.6 +/-    1.64      14.7 +/-    1.64  0.040 / 0.070
G06     177.4          40.3                8.2 +/-    0.88      11.9 +/-    0.88  0.150 / 0.350
G13     236.0          19.6                5.3 +/-    0.91      11.8 +/-    0.91  0.100 / 0.360
G15     267.3          11.2                3.8 +/-    2.24      10.4 +/-    2.24  0.020 / 0.030
G17     12.0           66.3                3.5 +/-    0.62       3.8 +/-    0.62  0.030 / 0.030
G19     294.4          71.5                4.8 +/-    0.77       5.0 +/-    0.77  0.170 / 0.260
G24     315.8          21.1                2.9 +/-    2.17       6.2 +/-    2.17  0.110 / 0.170
G28     77.3           44.4                4.7 +/-    0.63       6.3 +/-    0.63  0.050 / 0.090
G30     155.3          23.2                7.3 +/-    2.01      14.8 +/-    2.01  0.050 / 0.070