PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-12:57:50
G08     313.3          16.3                3.0 +/-    2.22       7.2 +/-    2.22  0.040 / 0.050
G10     327.1          59.1                3.4 +/-    0.73       3.9 +/-    0.73  0.060 / 0.060
G14     217.3          27.3                4.5 +/-    2.82       8.4 +/-    2.82  0.050 / 0.040
G15     46.5           11.1                2.7 +/-    1.72       7.4 +/-    1.72  0.030 / 0.040
G20     82.8           11.5                3.6 +/-    1.30       9.8 +/-    1.30  0.110 / 0.190
G21     132.1          56.8                5.7 +/-    0.60       6.6 +/-    0.60  0.250 / 0.230
G24     77.2           30.4                3.3 +/-    1.32       5.7 +/-    1.32  0.210 / 0.170
G27     276.4          37.8                5.5 +/-    1.72       8.2 +/-    1.72  0.150 / 0.310
G32     221.6          51.0                6.5 +/-    1.80       8.2 +/-    1.80  0.080 / 0.070