PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-12:58:00
G01     122.5          15.3                7.9 +/-    1.87      19.5 +/-    1.87  0.040 / 0.040
G07     69.7           68.2                6.4 +/-    0.81       6.9 +/-    0.81  0.030 / 0.040
G08     46.5           34.0                5.6 +/-    0.67       9.1 +/-    0.67  0.110 / 0.180
G09     176.1          28.4                7.2 +/-    1.14      13.0 +/-    1.14  0.090 / 0.200
G11     110.9          38.2                7.4 +/-    0.40      11.0 +/-    0.40  0.040 / 0.110
G13     319.3          16.4                2.9 +/-    1.94       7.0 +/-    1.94  0.050 / 0.100
G17     200.6          20.8                6.5 +/-    1.17      14.1 +/-    1.17  0.040 / 0.050
G18     97.9           19.2                7.2 +/-    0.50      16.2 +/-    0.50  0.040 / 0.060
G28     285.3          55.6                5.6 +/-    1.06       6.6 +/-    1.06  0.020 / 0.030
G30     338.4          64.4                4.9 +/-    0.53       5.4 +/-    0.53  0.030 / 0.040