PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-19:42:50
G01     230.8          21.1               11.2 +/-    1.78      24.1 +/-    1.78  0.030 / 0.030
G03     296.8          65.7               11.3 +/-    0.60      12.3 +/-    0.60  0.030 / 0.030
G14     81.1           28.5                9.6 +/-    1.77      17.3 +/-    1.77  0.080 / 0.150
G16     152.9          38.7               13.7 +/-    0.88      20.4 +/-    0.88  0.090 / 0.130
G22     231.6          74.5               11.2 +/-    0.40      11.6 +/-    0.40  0.070 / 0.220
G23     303.4          33.8                8.7 +/-    1.90      14.1 +/-    1.90  0.340 / 0.210
G26     108.1          52.6               11.5 +/-    0.36      14.0 +/-    0.36  0.070 / 0.070
G31     43.1           37.3                7.8 +/-    1.43      11.9 +/-    1.43  0.070 / 0.070