PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-07:27:30
G08     306.6          19.4                2.8 +/-    0.97       6.3 +/-    0.97  0.140 / 0.180
G10     343.6          61.5                4.2 +/-    0.41       4.7 +/-    0.41  0.090 / 0.190
G14     221.8          31.7                6.2 +/-    2.16      10.5 +/-    2.16  0.060 / 0.090
G20     70.7           40.9                6.1 +/-    0.57       8.8 +/-    0.57  0.060 / 0.060
G21     139.6          51.6                8.2 +/-    0.83      10.1 +/-    0.83  0.030 / 0.050
G24     66.9           29.1                5.9 +/-    1.15      10.5 +/-    1.15  0.030 / 0.050
G27     266.6          36.1                7.6 +/-    1.54      11.9 +/-    1.54  0.100 / 0.160
G32     229.7          60.0                7.5 +/-    1.64       8.6 +/-    1.64  0.090 / 0.200