PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-12:27:50
G10     290.7          49.1                5.3 +/-    2.00       6.8 +/-    2.00  0.060 / 0.120
G15     46.7           30.6                2.8 +/-    0.76       4.8 +/-    0.76  0.060 / 0.110
G20     66.1           25.8                2.7 +/-    2.59       5.3 +/-    2.59  0.030 / 0.040
G21     86.7           74.5                3.4 +/-    1.11       3.6 +/-    1.11  0.030 / 0.040
G24     103.0          24.7                3.7 +/-    1.47       7.3 +/-    1.47  0.080 / 0.170
G27     304.0          32.8                4.6 +/-    1.62       7.6 +/-    1.62  0.070 / 0.150
G29     167.7          10.2                4.4 +/-    0.61      12.1 +/-    0.61  0.050 / 0.050
G32     208.9          28.3                6.2 +/-    2.88      11.2 +/-    2.88  0.040 / 0.060