PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-08:42:40
G08     320.0          11.1               -3.8 +/-   28.30     -10.3 +/-   28.30  0.120 / 0.470
G10     313.4          56.3                4.2 +/-    0.72       4.9 +/-    0.72  0.120 / 0.510
G14     214.1          18.0                4.2 +/-    1.79       9.8 +/-    1.79  0.050 / 0.090
G15     45.6           18.4                1.8 +/-    0.59       4.2 +/-    0.59  0.060 / 0.070
G20     65.3           37.6                4.2 +/-    0.46       6.4 +/-    0.46  0.040 / 0.040
G21     121.3          66.1                5.1 +/-    0.66       5.5 +/-    0.66  0.030 / 0.030
G24     85.9           29.5                5.4 +/-    1.18       9.5 +/-    1.18  0.080 / 0.120
G27     287.3          37.5                5.7 +/-    1.32       8.6 +/-    1.32  0.070 / 0.130
G32     215.8          44.0                6.8 +/-    1.41       9.4 +/-    1.41  0.060 / 0.090