PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-14:58:00
G08     316.1          14.7                2.5 +/-    1.62       6.4 +/-    1.62  0.040 / 0.060
G10     318.1          57.3                4.3 +/-    0.94       5.0 +/-    0.94  0.060 / 0.060
G14     215.0          23.6                9.3 +/-    2.47      18.9 +/-    2.47  0.030 / 0.040
G15     45.8           15.1                3.5 +/-    1.79       8.7 +/-    1.79  0.030 / 0.040
G18     30.9           61.0                6.5 +/-    0.41       7.3 +/-    0.41  0.090 / 0.100
G20     79.7           13.2                6.8 +/-    1.63      17.6 +/-    1.63  0.080 / 0.100
G21     126.7          59.9                8.1 +/-    0.51       9.2 +/-    0.51  0.140 / 0.240
G24     83.3           30.1                7.5 +/-    0.67      13.1 +/-    0.67  0.160 / 0.340
G27     282.7          38.0                5.4 +/-    1.09       8.1 +/-    1.09  0.080 / 0.280
G32     218.0          45.4                8.8 +/-    1.88      11.7 +/-    1.88  0.130 / 0.260