PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-01:28:00
G08     293.4          23.4                8.6 +/-    0.92      17.4 +/-    0.92  0.030 / 0.030
G10     1.4            62.9                8.6 +/-    0.81       9.6 +/-    0.81  0.030 / 0.030
G14     228.9          46.7               12.4 +/-    2.27      16.4 +/-    2.27  0.050 / 0.070
G18     60.3           52.7                9.5 +/-    0.71      11.6 +/-    0.71  0.040 / 0.060
G21     145.0          41.3               11.0 +/-    0.92      15.7 +/-    0.92  0.070 / 0.070
G24     59.0           27.4                8.8 +/-    1.48      16.4 +/-    1.48  0.080 / 0.160
G27     254.4          32.3               11.6 +/-    2.26      19.5 +/-    2.26  0.060 / 0.140
G32     241.8          64.2                9.5 +/-    1.01      10.4 +/-    1.01  0.100 / 0.120