PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-21:43:10
G05     50.5           13.4                7.5 +/-    1.69      19.3 +/-    1.69  0.070 / 0.190
G10     239.4          16.2               13.7 +/-    3.04      33.0 +/-    3.04  0.150 / 0.230
G13     69.3           35.5                9.7 +/-    1.48      15.3 +/-    1.48  0.060 / 0.060
G15     122.7          55.0               10.7 +/-    0.79      12.7 +/-    0.79  0.060 / 0.060
G16     308.2          14.9                5.8 +/-    2.87      14.4 +/-    2.87  0.110 / 0.330
G20     243.7          8.1                 5.7 +/-    1.76      16.6 +/-    1.76  0.090 / 0.400
G21     316.8          49.3                9.3 +/-    0.75      11.9 +/-    0.75  0.080 / 0.100
G26     280.7          20.2                8.2 +/-    2.83      17.9 +/-    2.83  0.060 / 0.100
G29     159.6          68.2                9.7 +/-    0.57      10.4 +/-    0.57  0.030 / 0.040