PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-08:58:10
G01     317.9          20.6                4.9 +/-    1.85      10.6 +/-    1.85  0.050 / 0.050
G08     256.9          11.5                4.5 +/-   21.80      12.0 +/-   21.80  0.050 / 0.040
G10     84.8           51.4                5.0 +/-    1.46       6.1 +/-    1.46  0.170 / 0.330
G11     300.9          23.8                5.6 +/-    1.92      11.2 +/-    1.92  0.160 / 0.250
G14     294.9          68.7                5.6 +/-    0.83       5.9 +/-    0.83  0.220 / 0.310
G18     301.9          42.0                5.7 +/-    1.51       8.1 +/-    1.51  0.360 / 0.250
G20     112.5          10.5                4.2 +/-    1.80      11.4 +/-    1.80  0.280 / 0.380
G22     303.4          16.4                2.6 +/-    3.20       6.3 +/-    3.20  0.250 / 0.290
G31     172.9          47.7                6.3 +/-    0.89       8.2 +/-    0.89  0.070 / 0.160
G32     17.2           63.8                4.2 +/-    0.51       4.6 +/-    0.51  0.070 / 0.150