PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-21:42:50
G10     290.9          49.6                9.6 +/-    2.69      12.1 +/-    2.69  0.040 / 0.040
G15     48.3           37.4                8.3 +/-    0.76      12.7 +/-    0.76  0.030 / 0.030
G20     340.9          65.4               10.3 +/-    0.72      11.2 +/-    0.72  0.080 / 0.110
G21     78.7           76.3               10.4 +/-    0.41      10.7 +/-    0.41  0.100 / 0.100
G24     99.8           24.4               11.2 +/-    1.45      22.3 +/-    1.45  0.080 / 0.130
G27     306.1          31.2                9.3 +/-    0.85      15.9 +/-    0.85  0.100 / 0.140
G29     168.5          12.3               12.5 +/-    1.67      33.0 +/-    1.67  0.050 / 0.050
G32     208.5          28.4               12.2 +/-    1.37      22.1 +/-    1.37  0.060 / 0.070