PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-08:12:50
G08     272.6          18.8                5.1 +/-    1.40      11.5 +/-    1.40  0.040 / 0.070
G10     55.7           59.6                4.6 +/-    0.61       5.2 +/-    0.61  0.040 / 0.070
G14     256.2          60.1                5.5 +/-    0.67       6.2 +/-    0.67  0.120 / 0.240
G18     314.0          28.6                5.4 +/-    3.26       9.7 +/-    3.26  0.150 / 0.240
G20     99.6           23.1                3.8 +/-    0.99       7.8 +/-    0.99  0.100 / 0.310
G21     154.3          18.4                5.5 +/-    2.70      12.5 +/-    2.70  0.100 / 0.280
G24     40.7           11.7                2.7 +/-    1.33       7.2 +/-    1.33  0.030 / 0.030
G27     233.6          17.6                6.4 +/-    1.32      14.9 +/-    1.32  0.030 / 0.030
G31     177.3          29.3                6.2 +/-    1.55      10.9 +/-    1.55  0.080 / 0.170
G32     336.1          75.1                5.6 +/-    0.65       5.7 +/-    0.65  0.090 / 0.200