PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-21:42:40
G10     256.0          32.4               13.4 +/-    1.70      22.4 +/-    1.70  0.150 / 0.650
G13     48.1           25.2                9.2 +/-    0.75      17.9 +/-    0.75  0.140 / 0.590
G15     75.4           56.0               10.2 +/-    0.50      12.0 +/-    0.50  0.100 / 0.120
G16     289.9          15.2                9.2 +/-    1.96      22.8 +/-    1.96  0.070 / 0.090
G20     279.0          54.6               11.4 +/-    1.00      13.6 +/-    1.00  0.050 / 0.050
G21     341.0          63.6                9.5 +/-    0.61      10.4 +/-    0.61  0.060 / 0.050
G26     262.8          13.1               12.9 +/-    1.61      33.6 +/-    1.61  0.070 / 0.210
G29     165.0          43.5               12.1 +/-    0.46      16.6 +/-    0.46  0.070 / 0.230