PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-02:43:10
G08     278.5          22.3                9.8 +/-    1.37      20.5 +/-    1.37  0.070 / 0.160
G10     32.9           62.7                6.4 +/-    0.69       7.1 +/-    0.69  0.080 / 0.160
G14     245.0          58.9               11.5 +/-    0.72      13.2 +/-    0.72  0.030 / 0.030
G18     77.5           45.2                6.8 +/-    0.45       9.1 +/-    0.45  0.030 / 0.030
G21     151.0          27.5               11.7 +/-    1.56      21.6 +/-    1.56  0.060 / 0.170
G24     47.3           20.2                6.7 +/-    0.67      14.6 +/-    0.67  0.090 / 0.170
G27     240.7          24.0               11.1 +/-    1.36      22.2 +/-    1.36  0.040 / 0.070
G31     181.4          16.9               13.9 +/-    4.48      33.0 +/-    4.48  0.040 / 0.070
G32     279.0          74.1                9.5 +/-    0.35       9.9 +/-    0.35  0.090 / 0.170