PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-22:58:00
G02     74.5           22.3                8.9 +/-    1.31      18.6 +/-    1.31  0.140 / 0.350
G05     45.2           45.6               10.0 +/-    0.86      13.4 +/-    0.86  0.160 / 0.390
G12     180.0          11.4               18.0 +/-    1.73      48.7 +/-    1.73  0.030 / 0.030
G13     111.8          28.5               13.2 +/-    1.26      23.8 +/-    1.26  0.020 / 0.030
G15     154.2          27.8               16.7 +/-    1.50      30.6 +/-    1.50  0.080 / 0.160
G18     225.5          17.4               15.9 +/-    2.02      37.3 +/-    2.02  0.080 / 0.170
G20     240.7          83.8               13.1 +/-    0.72      13.2 +/-    0.72  0.110 / 0.150
G21     287.7          29.6               11.3 +/-    1.21      20.0 +/-    1.21  0.110 / 0.170
G25     210.3          32.2               15.3 +/-    1.60      25.5 +/-    1.60  0.030 / 0.060
G29     348.2          77.2               12.3 +/-    0.50      12.6 +/-    0.50  0.040 / 0.060