PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-13:43:10
G10     300.0          52.4                4.3 +/-    1.12       5.3 +/-    1.12  0.070 / 0.220
G14     211.1          12.9                2.1 +/-    2.23       5.5 +/-    2.23  0.090 / 0.260
G15     45.6           24.8                3.1 +/-    0.95       6.1 +/-    0.95  0.070 / 0.080
G20     71.2           20.8                3.0 +/-    1.23       6.6 +/-    1.23  0.080 / 0.070
G21     107.1          69.8                4.2 +/-    0.63       4.4 +/-    0.63  0.030 / 0.040
G24     96.1           27.4                7.8 +/-    1.88      14.5 +/-    1.88  0.030 / 0.040
G27     296.8          35.7                4.1 +/-    0.99       6.4 +/-    0.99  0.090 / 0.320
G32     211.7          34.5                5.5 +/-    1.00       8.7 +/-    1.00  0.090 / 0.390