PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-06:58:10
G08     312.9          16.6                3.3 +/-    1.29       7.9 +/-    1.29  0.030 / 0.040
G10     328.7          59.4                3.7 +/-    0.67       4.2 +/-    0.67  0.040 / 0.050
G14     217.8          24.7                5.4 +/-    2.07      10.7 +/-    2.07  0.240 / 0.400
G15     46.6           12.0                1.5 +/-    2.77       3.9 +/-    2.77  0.150 / 0.280
G20     61.0           47.0                4.3 +/-    0.86       5.7 +/-    0.86  0.170 / 0.250
G21     132.6          59.0                7.4 +/-    0.70       8.5 +/-    0.70  0.160 / 0.270
G24     75.5           30.0                7.4 +/-    0.90      12.9 +/-    0.90  0.060 / 0.080
G27     276.4          37.6                6.2 +/-    1.60       9.4 +/-    1.60  0.050 / 0.070
G32     221.9          52.7                8.5 +/-    1.13      10.3 +/-    1.13  0.040 / 0.050