PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/19-18:12:30
G10     249.9          26.5                9.2 +/-    2.22      17.4 +/-    2.22  0.040 / 0.050
G13     54.1           30.0                7.8 +/-    1.26      13.6 +/-    1.26  0.040 / 0.060
G15     94.5           59.4                9.4 +/-    0.36      10.7 +/-    0.36  0.200 / 0.660
G16     296.5          15.5                7.9 +/-    2.96      19.5 +/-    2.96  0.160 / 0.780
G20     268.8          50.3                7.3 +/-    0.68       9.2 +/-    0.68  0.070 / 0.170
G21     334.3          60.2                8.1 +/-    0.92       9.2 +/-    0.92  0.070 / 0.170
G26     269.3          15.8                9.7 +/-    1.98      23.8 +/-    1.98  0.030 / 0.040
G29     164.1          50.9                9.4 +/-    0.96      11.8 +/-    0.96  0.030 / 0.040