PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-23:58:00
G08     289.7          23.5               13.4 +/-    1.95      27.2 +/-    1.95  0.040 / 0.020
G10     9.7            63.2               11.7 +/-    0.93      12.9 +/-    0.93  0.040 / 0.020
G14     232.3          49.8               13.8 +/-    2.33      17.4 +/-    2.33  0.180 / 0.120
G18     65.9           50.2               12.6 +/-    0.72      15.9 +/-    0.72  0.180 / 0.110
G21     146.8          36.7               12.8 +/-    1.02      19.6 +/-    1.02  0.050 / 0.070
G24     55.5           25.8               10.7 +/-    2.19      20.5 +/-    2.19  0.040 / 0.060
G27     250.5          30.3               15.6 +/-    1.98      27.2 +/-    1.98  0.100 / 0.140
G32     247.8          66.2               12.5 +/-    0.63      13.6 +/-    0.63  0.120 / 0.080