PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/13-12:58:00
G01     57.7           29.2                4.9 +/-    1.18       8.7 +/-    1.18  0.030 / 0.040
G07     142.2          18.5                4.4 +/-    3.45      10.0 +/-    3.45  0.030 / 0.030
G11     47.6           23.7                3.8 +/-    2.09       7.6 +/-    2.09  0.120 / 0.220
G13     259.7          35.7                6.2 +/-    1.76       9.8 +/-    1.76  0.130 / 0.210
G15     293.1          16.1                4.3 +/-    1.60      10.4 +/-    1.60  0.140 / 0.400
G17     253.4          73.7                4.3 +/-    0.32       4.5 +/-    0.32  0.130 / 0.370
G18     40.8           11.6                5.1 +/-    2.54      13.7 +/-    2.54  0.090 / 0.080
G19     233.3          53.6                5.0 +/-    2.13       6.1 +/-    2.13  0.080 / 0.070
G28     26.3           59.4                4.0 +/-    0.42       4.6 +/-    0.42  0.130 / 0.270
G30     144.7          51.2                5.5 +/-    0.73       6.8 +/-    0.73  0.120 / 0.270