PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-20:27:30
G02     76.8           20.4                6.8 +/-    1.32      14.7 +/-    1.32  0.080 / 0.200
G05     44.7           40.1                7.0 +/-    1.26      10.2 +/-    1.26  0.100 / 0.190
G13     106.9          29.6                8.2 +/-    1.02      14.4 +/-    1.02  0.060 / 0.130
G15     154.0          29.9               13.0 +/-    0.82      22.8 +/-    0.82  0.060 / 0.160
G20     228.5          -14.5              14.4 +/-    4.28      36.3 +/-    4.28  0.030 / 0.050
G21     289.9          30.2                9.2 +/-    0.92      16.1 +/-    0.92  0.040 / 0.050
G25     212.6          32.1               12.0 +/-    1.13      20.1 +/-    1.13  0.080 / 0.160
G26     310.6          16.8                8.2 +/-    1.71      19.5 +/-    1.71  0.090 / 0.160
G29     344.3          76.7                8.2 +/-    0.66       8.4 +/-    0.66  0.100 / 0.100