PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-06:57:50
G03     188.5          13.9                6.6 +/-    4.43      16.9 +/-    4.43  0.140 / 0.380
G07     300.3          43.4                5.1 +/-    0.85       7.1 +/-    0.85  0.100 / 0.320
G08     131.9          36.3                7.7 +/-    1.11      12.0 +/-    1.11  0.060 / 0.050
G09     315.7          78.6                5.1 +/-    0.62       5.2 +/-    0.62  0.040 / 0.060
G16     41.7           28.5                1.1 +/-    0.95       1.9 +/-    0.95  0.060 / 0.080
G23     137.1          71.6                5.8 +/-    1.04       6.1 +/-    1.04  0.050 / 0.080
G27     89.3           36.9                5.3 +/-    0.64       8.1 +/-    0.64  0.030 / 0.040
G30     280.2          16.8                6.1 +/-    3.03      14.6 +/-    3.03  0.030 / 0.040