PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-21:43:00
G02     80.4           17.1               12.2 +/-    0.82      28.8 +/-    0.82  0.070 / 0.120
G05     44.4           40.5               13.0 +/-    0.65      18.8 +/-    0.65  0.060 / 0.160
G13     104.9          32.1               17.0 +/-    0.94      28.5 +/-    0.94  0.050 / 0.120
G15     148.8          34.2               17.8 +/-    0.99      28.6 +/-    0.99  0.060 / 0.150
G18     229.1          23.7               16.9 +/-    1.69      34.1 +/-    1.69  0.150 / 0.370
G20     325.1          85.8               13.1 +/-    0.59      13.1 +/-    0.59  0.110 / 0.450
G21     293.7          34.0               14.5 +/-    1.09      23.5 +/-    1.09  0.020 / 0.030
G25     207.1          26.5               14.3 +/-    1.50      27.0 +/-    1.50  0.030 / 0.030
G26     310.6          15.9               12.5 +/-    1.90      30.5 +/-    1.90  0.050 / 0.070
G29     17.2           84.6               15.3 +/-    0.30      15.4 +/-    0.30  0.050 / 0.060