PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-09:58:00
G01     320.3          14.8               -0.5 +/-   12.84      -1.3 +/-   12.84  0.140 / 0.300
G08     261.1          15.6                6.2 +/-    2.95      15.2 +/-    2.95  0.230 / 0.300
G10     73.4           54.5                5.1 +/-    0.44       6.2 +/-    0.44  0.040 / 0.050
G11     306.3          21.4                4.1 +/-    1.48       8.8 +/-    1.48  0.040 / 0.050
G14     284.4          70.1                3.7 +/-    0.77       3.9 +/-    0.77  0.030 / 0.030
G18     307.4          39.0                4.4 +/-    1.88       6.5 +/-    1.88  0.030 / 0.030
G20     101.6          32.0                5.5 +/-    1.14       9.2 +/-    1.14  0.040 / 0.030
G27     228.6          12.3                4.2 +/-    2.93      11.1 +/-    2.93  0.040 / 0.040
G31     177.6          36.3                5.5 +/-    1.17       8.6 +/-    1.17  0.190 / 0.260
G32     341.0          72.4                5.5 +/-    0.96       5.8 +/-    0.96  0.160 / 0.310