PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-09:42:50
G08     281.4          20.6                5.6 +/-    1.90      12.3 +/-    1.90  0.050 / 0.090
G10     40.3           61.8                4.9 +/-    0.41       5.4 +/-    0.41  0.040 / 0.080
G14     245.5          55.2                7.7 +/-    1.08       9.2 +/-    1.08  0.120 / 0.070
G18     316.4          22.0                3.1 +/-    3.10       6.5 +/-    3.10  0.090 / 0.060
G20     98.6           14.9                4.1 +/-    1.42      10.1 +/-    1.42  0.080 / 0.280
G21     152.4          25.3                7.5 +/-    0.94      14.5 +/-    0.94  0.090 / 0.270
G24     44.7           17.2                2.4 +/-    0.64       5.7 +/-    0.64  0.020 / 0.010
G27     239.4          22.5                5.8 +/-    3.36      12.1 +/-    3.36  0.030 / 0.010
G31     179.1          21.7                5.7 +/-    2.26      12.1 +/-    2.26  0.100 / 0.230
G32     302.6          76.8                4.6 +/-    0.91       4.8 +/-    0.91  0.120 / 0.260