PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-10:27:30
G10     300.5          52.6                3.9 +/-    1.29       4.7 +/-    1.29  0.130 / 0.350
G14     211.4          11.7               -0.7 +/-   16.42      -1.9 +/-   16.42  0.180 / 0.520
G15     45.7           24.9                3.1 +/-    1.74       6.1 +/-    1.74  0.070 / 0.070
G20     67.8           28.0                2.1 +/-    4.34       3.9 +/-    4.34  0.080 / 0.060
G21     105.1          71.6                3.8 +/-    0.88       4.0 +/-    0.88  0.080 / 0.130
G24     95.4           27.4                3.2 +/-    1.42       5.8 +/-    1.42  0.080 / 0.110
G27     296.9          35.6                6.5 +/-    2.40      10.2 +/-    2.40  0.040 / 0.030
G32     211.6          35.6                5.7 +/-    1.99       8.9 +/-    1.99  0.030 / 0.030