PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/27-09:27:50
G10     281.2          45.3                5.5 +/-    1.88       7.4 +/-    1.88  0.060 / 0.080
G15     49.4           37.5                3.2 +/-    0.61       4.9 +/-    0.61  0.060 / 0.080
G20     53.9           41.2                3.6 +/-    0.83       5.1 +/-    0.83  0.030 / 0.040
G21     50.2           77.0                3.9 +/-    0.47       3.9 +/-    0.47  0.040 / 0.040
G24     109.8          21.1                5.7 +/-    0.60      12.3 +/-    0.60  0.070 / 0.120
G27     310.7          28.4                3.9 +/-    1.36       7.1 +/-    1.36  0.070 / 0.110
G29     168.5          18.1                5.6 +/-    1.39      12.9 +/-    1.39  0.040 / 0.060
G32     206.5          21.8                6.2 +/-    1.73      13.0 +/-    1.73  0.060 / 0.060