PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-02:27:30
G08     284.2          23.2                7.4 +/-    1.02      15.0 +/-    1.02  0.060 / 0.120
G10     20.7           63.2                8.4 +/-    0.55       9.3 +/-    0.55  0.090 / 0.100
G14     237.8          54.4                9.4 +/-    2.59      11.3 +/-    2.59  0.090 / 0.120
G18     71.1           48.2                6.8 +/-    0.49       8.7 +/-    0.49  0.100 / 0.150
G21     149.1          32.9                8.9 +/-    0.86      14.7 +/-    0.86  0.030 / 0.030
G24     51.2           23.3                6.5 +/-    2.02      13.1 +/-    2.02  0.030 / 0.020
G27     245.6          27.4                8.2 +/-    1.79      15.3 +/-    1.79  0.060 / 0.090
G31     182.7          11.9                4.2 +/-   16.13      11.2 +/-   16.13  0.080 / 0.090
G32     261.2          71.2                8.0 +/-    0.65       8.5 +/-    0.65  0.070 / 0.130