PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-02:28:00
G10     294.4          51.5               10.1 +/-    2.77      12.5 +/-    2.77  0.090 / 0.090
G15     46.5           29.8                6.9 +/-    1.81      12.1 +/-    1.81  0.050 / 0.090
G20     344.9          65.2                9.8 +/-    0.93      10.7 +/-    0.93  0.120 / 0.080
G21     84.6           75.8               10.2 +/-    0.78      10.5 +/-    0.78  0.130 / 0.060
G24     101.1          25.4                9.7 +/-    1.75      18.8 +/-    1.75  0.050 / 0.040
G27     304.5          32.4                7.7 +/-    2.88      12.9 +/-    2.88  0.030 / 0.040
G32     209.5          27.1               12.0 +/-    1.17      22.3 +/-    1.17  0.080 / 0.110