PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-13:27:50
G01     85.2           32.5                5.3 +/-    0.71       8.8 +/-    0.71  0.060 / 0.110
G07     129.1          39.1                6.0 +/-    0.63       8.8 +/-    0.63  0.070 / 0.100
G11     62.9           35.6                3.5 +/-    0.86       5.6 +/-    0.86  0.020 / 0.030
G13     292.2          35.8                5.6 +/-    0.94       8.8 +/-    0.94  0.030 / 0.030
G15     314.5          10.3               -7.7 +/-   14.97     -21.4 +/-   14.97  0.050 / 0.070
G17     217.6          60.3                6.8 +/-    0.47       7.7 +/-    0.47  0.040 / 0.060
G19     216.4          32.6                5.5 +/-    0.76       9.2 +/-    0.76  0.090 / 0.100
G28     357.3          61.2                4.8 +/-    0.45       5.4 +/-    0.45  0.090 / 0.090
G30     111.4          75.0                5.4 +/-    0.77       5.6 +/-    0.77  0.030 / 0.040