PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-11:43:00
G01     39.9           14.8                2.5 +/-    2.78       6.3 +/-    2.78  0.040 / 0.070
G06     173.2          40.2                5.4 +/-    1.10       7.8 +/-    1.10  0.040 / 0.060
G13     235.8          22.3                6.3 +/-    1.18      13.1 +/-    1.18  0.110 / 0.190
G15     271.1          11.8                4.3 +/-    2.08      11.6 +/-    2.08  0.130 / 0.180
G17     356.3          71.7                5.1 +/-    0.73       5.4 +/-    0.73  0.030 / 0.040
G19     281.9          70.9                4.1 +/-    0.64       4.3 +/-    0.64  0.030 / 0.030
G24     316.6          18.4                3.8 +/-    2.85       8.6 +/-    2.85  0.100 / 0.330
G28     64.5           51.9                4.4 +/-    0.88       5.4 +/-    0.88  0.090 / 0.290
G30     155.2          28.4                5.5 +/-    1.28      10.0 +/-    1.28  0.040 / 0.040