PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-08:12:40
G08     317.1          14.5                1.7 +/-    2.19       4.4 +/-    2.19  0.040 / 0.040
G10     315.4          57.1                4.6 +/-    1.29       5.3 +/-    1.29  0.040 / 0.030
G14     213.0          22.0                5.8 +/-    2.54      12.1 +/-    2.54  0.140 / 0.250
G15     45.6           17.7                2.5 +/-    2.71       5.8 +/-    2.71  0.150 / 0.320
G20     17.5           63.6                4.5 +/-    0.85       5.0 +/-    0.85  0.070 / 0.060
G21     122.1          64.1                7.3 +/-    0.58       8.1 +/-    0.58  0.080 / 0.110
G24     84.4           29.1                5.9 +/-    1.31      10.5 +/-    1.31  0.050 / 0.040
G27     290.1          36.7                4.5 +/-    1.68       6.9 +/-    1.68  0.040 / 0.030
G32     216.3          36.8                7.9 +/-    0.82      12.1 +/-    0.82  0.060 / 0.070