PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-21:58:10
G10     267.1          39.5               10.3 +/-    1.49      15.0 +/-    1.49  0.040 / 0.040
G13     41.6           17.4                8.1 +/-    3.87      19.1 +/-    3.87  0.050 / 0.040
G15     59.7           49.4                9.6 +/-    1.04      12.2 +/-    1.04  0.210 / 0.350
G16     279.3          12.7                8.9 +/-    2.52      23.4 +/-    2.52  0.100 / 0.320
G20     297.8          60.2                8.9 +/-    0.91      10.1 +/-    0.91  0.040 / 0.040
G21     0.2            71.0                9.6 +/-    0.72      10.1 +/-    0.72  0.040 / 0.040
G24     122.0          13.9               12.1 +/-    2.74      30.9 +/-    2.74  0.260 / 0.570
G27     319.2          18.1                8.1 +/-    2.13      18.6 +/-    2.13  0.200 / 0.620
G29     167.0          31.8               10.8 +/-    1.39      18.2 +/-    1.39  0.220 / 0.170