PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-10:58:00
G01     246.1          33.7                5.5 +/-    0.61       8.9 +/-    0.61  0.040 / 0.040
G03     315.1          51.3                4.6 +/-    0.88       5.7 +/-    0.88  0.040 / 0.040
G14     63.9           38.3                4.0 +/-    0.64       5.9 +/-    0.64  0.080 / 0.130
G16     163.0          19.8               -5.0 +/-   14.96     -11.1 +/-   14.96  0.080 / 0.100
G18     216.4          24.0                4.5 +/-    1.69       9.0 +/-    1.69  0.060 / 0.100
G22     294.8          72.3                5.7 +/-    0.87       5.9 +/-    0.87  0.060 / 0.120
G23     289.8          22.6                4.0 +/-    1.82       8.4 +/-    1.82  0.050 / 0.080
G26     135.3          40.3                6.1 +/-    0.89       8.8 +/-    0.89  0.050 / 0.080
G31     41.0           54.8                4.1 +/-    0.79       4.9 +/-    0.79  0.150 / 0.340
G32     78.2           24.0                3.7 +/-    1.61       7.3 +/-    1.61  0.080 / 0.290