PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-03:43:00
G08     289.4          23.6                7.5 +/-    1.50      15.1 +/-    1.50  0.030 / 0.030
G10     9.5            63.2                6.9 +/-    0.68       7.7 +/-    0.68  0.040 / 0.030
G14     232.4          50.1                9.1 +/-    2.02      11.5 +/-    2.02  0.150 / 0.140
G18     64.3           51.4                5.8 +/-    1.75       7.2 +/-    1.75  0.210 / 0.190
G21     147.0          38.3               10.0 +/-    1.00      15.0 +/-    1.00  0.040 / 0.070
G24     55.4           25.8                6.2 +/-    2.56      12.0 +/-    2.56  0.040 / 0.080
G27     250.4          30.3                8.9 +/-    2.12      15.4 +/-    2.12  0.030 / 0.020
G32     249.9          68.4                6.6 +/-    0.92       7.1 +/-    0.92  0.030 / 0.020