PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-06:57:30
G03     189.3          15.5                2.8 +/-    1.72       6.8 +/-    1.72  0.090 / 0.170
G07     298.3          42.3                4.7 +/-    3.04       6.6 +/-    3.04  0.080 / 0.150
G08     133.6          34.8                6.1 +/-    1.10       9.8 +/-    1.10  0.050 / 0.070
G09     318.5          76.6                6.1 +/-    0.41       6.3 +/-    0.41  0.050 / 0.050
G16     41.8           30.2                2.1 +/-    1.60       3.7 +/-    1.60  0.340 / 0.420
G23     134.0          73.5                4.6 +/-    0.57       4.7 +/-    0.57  0.140 / 0.530
G27     91.7           36.4                5.5 +/-    0.74       8.5 +/-    0.74  0.030 / 0.030
G30     278.8          15.7                4.0 +/-    1.65       9.8 +/-    1.65  0.030 / 0.030