PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-23:12:40
G10     253.1          27.8               11.9 +/-    1.95      21.8 +/-    1.95  0.100 / 0.360
G13     52.1           29.7               10.0 +/-    1.10      17.6 +/-    1.10  0.140 / 0.440
G15     82.7           57.4               13.2 +/-    0.67      15.3 +/-    0.67  0.090 / 0.370
G16     295.2          14.2                7.2 +/-    1.79      18.1 +/-    1.79  0.070 / 0.480
G18     273.0          57.2                9.8 +/-    1.64      11.4 +/-    1.64  0.060 / 0.050
G20     45.4           45.2               10.5 +/-    0.86      14.1 +/-    0.86  0.040 / 0.060
G21     337.9          62.7               10.8 +/-    0.42      12.0 +/-    0.42  0.050 / 0.070
G26     267.6          14.3               10.5 +/-    1.18      26.5 +/-    1.18  0.060 / 0.070
G29     164.4          43.6               11.6 +/-    0.69      15.9 +/-    0.69  0.030 / 0.040