PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-01:57:40
G08     303.9          21.5                6.9 +/-    2.33      14.6 +/-    2.33  0.070 / 0.080
G10     339.1          60.9                7.4 +/-    0.37       8.3 +/-    0.37  0.080 / 0.070
G14     220.9          37.0               10.9 +/-    1.18      16.7 +/-    1.18  0.070 / 0.090
G18     44.5           58.0                8.8 +/-    0.62      10.1 +/-    0.62  0.060 / 0.070
G21     138.0          52.1               10.2 +/-    0.60      12.6 +/-    0.60  0.030 / 0.030
G24     70.2           30.2                8.1 +/-    1.13      14.1 +/-    1.13  0.030 / 0.030
G27     266.8          36.5                9.4 +/-    1.49      14.4 +/-    1.49  0.040 / 0.040
G32     228.0          55.2                8.5 +/-    2.54      10.1 +/-    2.54  0.030 / 0.040