PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-07:58:00
G01     68.0           31.7                4.2 +/-    0.59       7.0 +/-    0.59  0.030 / 0.040
G07     137.4          29.6                5.2 +/-    0.97       9.2 +/-    0.97  0.030 / 0.040
G11     54.0           32.9                2.9 +/-    0.76       4.7 +/-    0.76  0.060 / 0.120
G13     272.1          38.6                7.5 +/-    0.79      11.2 +/-    0.79  0.050 / 0.110
G15     300.9          15.8                2.0 +/-    2.54       4.9 +/-    2.54  0.050 / 0.140
G17     232.2          68.9                6.3 +/-    0.80       6.7 +/-    0.80  0.050 / 0.110
G19     223.6          44.9                5.5 +/-    0.76       7.4 +/-    0.76  0.080 / 0.130
G28     4.8            61.3                2.2 +/-    0.55       2.5 +/-    0.55  0.070 / 0.130
G30     136.8          64.2                7.4 +/-    0.88       8.1 +/-    0.88  0.040 / 0.060