PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-17:58:10
G01     235.9          25.5               10.4 +/-    1.71      20.0 +/-    1.71  0.050 / 0.060
G03     305.5          61.8                8.9 +/-    1.04       9.9 +/-    1.04  0.040 / 0.050
G14     74.8           32.8                8.9 +/-    1.24      14.7 +/-    1.24  0.030 / 0.040
G16     155.8          32.9               11.3 +/-    0.93      18.7 +/-    0.93  0.030 / 0.050
G22     254.5          76.4                9.7 +/-    1.15      10.0 +/-    1.15  0.100 / 0.110
G23     299.1          30.4                7.6 +/-    0.75      13.2 +/-    0.75  0.080 / 0.140
G26     117.1          49.5                9.6 +/-    0.67      12.1 +/-    0.67  0.090 / 0.130
G31     41.7           42.4                7.3 +/-    0.99      10.3 +/-    0.99  0.110 / 0.160
G32     90.4           12.7                9.5 +/-    1.66      25.0 +/-    1.66  0.090 / 0.120