PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-17:12:40
G01     39.9           13.9                7.4 +/-    1.17      19.0 +/-    1.17  0.070 / 0.210
G06     173.9          42.6               14.9 +/-    0.94      20.8 +/-    0.94  0.060 / 0.200
G13     237.1          20.3               14.8 +/-    0.95      32.4 +/-    0.95  0.070 / 0.140
G15     272.1          11.4               12.7 +/-    2.90      34.5 +/-    2.90  0.060 / 0.120
G17     12.5           66.5               10.6 +/-    0.55      11.4 +/-    0.55  0.110 / 0.130
G19     292.3          71.7               12.0 +/-    0.39      12.6 +/-    0.39  0.090 / 0.170
G24     316.4          20.0                9.3 +/-    1.98      20.4 +/-    1.98  0.150 / 0.330
G28     75.5           45.4               10.9 +/-    0.70      14.5 +/-    0.70  0.160 / 0.330
G30     155.7          27.1               14.8 +/-    0.66      27.7 +/-    0.66  0.170 / 0.300