PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/14-20:13:00
G10     265.3          38.6                9.0 +/-    1.61      13.4 +/-    1.61  0.040 / 0.040
G13     42.4           18.6                8.9 +/-    2.96      20.2 +/-    2.96  0.040 / 0.030
G15     61.7           50.7                9.5 +/-    0.62      11.9 +/-    0.62  0.160 / 0.480
G16     280.4          13.2                7.1 +/-    3.23      18.4 +/-    3.23  0.410 / 0.390
G20     295.8          60.0                8.6 +/-    0.74       9.8 +/-    0.74  0.030 / 0.040
G21     356.8          69.9               10.2 +/-    0.55      10.8 +/-    0.55  0.040 / 0.040
G24     123.6          12.9               10.4 +/-    2.89      27.1 +/-    2.89  0.140 / 0.290
G27     319.8          17.0                9.3 +/-    1.95      22.0 +/-    1.95  0.160 / 0.310
G29     167.0          34.0               11.2 +/-    0.87      18.2 +/-    0.87  0.060 / 0.070