PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-09:12:30
G05     49.7           14.3                2.5 +/-    2.50       6.3 +/-    2.50  0.070 / 0.040
G10     237.6          15.1                4.3 +/-    1.99      10.7 +/-    1.99  0.060 / 0.040
G13     72.1           35.5                6.3 +/-    1.10       9.9 +/-    1.10  0.070 / 0.070
G15     119.2          53.9                7.3 +/-    0.49       8.8 +/-    0.49  0.050 / 0.090
G16     315.8          10.7               -4.4 +/-    8.02     -12.1 +/-    8.02  0.100 / 0.210
G20     250.6          39.1                5.8 +/-    1.36       8.6 +/-    1.36  0.100 / 0.220
G21     320.6          52.3                4.1 +/-    0.76       5.1 +/-    0.76  0.230 / 0.270
G26     290.6          18.2                3.4 +/-    0.96       7.8 +/-    0.96  0.310 / 0.340
G29     153.0          64.9                7.7 +/-    0.39       8.4 +/-    0.39  0.040 / 0.040