PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-16:12:30
G02     205.0          36.0               15.3 +/-    1.55      23.9 +/-    1.55  0.140 / 0.160
G06     153.6          72.7               13.3 +/-    0.92      13.8 +/-    0.92  0.100 / 0.180
G12     310.0          18.6                9.7 +/-    1.90      22.1 +/-    1.90  0.030 / 0.060
G17     41.9           44.3                9.8 +/-    0.64      13.3 +/-    0.64  0.030 / 0.060
G19     13.5           61.8               11.2 +/-    0.50      12.6 +/-    0.50  0.060 / 0.090
G24     295.8          38.7               11.7 +/-    0.63      17.4 +/-    0.63  0.050 / 0.090
G28     106.5          28.3                9.9 +/-    0.93      17.9 +/-    0.93  0.050 / 0.040