PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-02:57:40
G08     304.1          21.1                8.1 +/-    3.16      17.3 +/-    3.16  0.070 / 0.090
G10     344.2          61.6               11.4 +/-    0.64      12.8 +/-    0.64  0.080 / 0.090
G14     221.7          34.2               16.7 +/-    2.03      26.9 +/-    2.03  0.080 / 0.160
G20     11.7           65.3               12.8 +/-    0.78      13.9 +/-    0.78  0.060 / 0.160
G21     139.7          52.2               14.0 +/-    1.03      17.2 +/-    1.03  0.040 / 0.050
G24     65.9           28.5                8.9 +/-    0.47      16.1 +/-    0.47  0.040 / 0.070
G27     267.2          36.1               13.1 +/-    1.48      20.3 +/-    1.48  0.050 / 0.100
G32     229.6          60.1               14.3 +/-    0.91      16.2 +/-    0.91  0.050 / 0.090