PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/05-05:27:50
G10     245.3          21.8                8.0 +/-    1.46      16.9 +/-    1.46  0.120 / 0.600
G13     60.3           33.4                3.1 +/-    0.39       5.0 +/-    0.39  0.130 / 0.520
G15     99.4           57.5                3.8 +/-    0.66       4.4 +/-    0.66  0.040 / 0.050
G16     301.6          15.5                2.2 +/-    2.92       5.3 +/-    2.92  0.040 / 0.050
G20     296.5          70.3                4.0 +/-    0.62       4.2 +/-    0.62  0.120 / 0.200
G21     325.9          55.5                2.9 +/-    0.67       3.5 +/-    0.67  0.090 / 0.190
G26     272.9          18.0                4.3 +/-    0.62      10.0 +/-    0.62  0.030 / 0.050
G29     163.0          57.8                4.9 +/-    0.82       5.7 +/-    0.82  0.030 / 0.050