PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-13:42:30
G03     229.8          69.6                9.9 +/-    0.33      10.5 +/-    0.33  0.070 / 0.220
G07     247.2          10.8               -7.8 +/-    7.50     -21.5 +/-    7.50  0.050 / 0.050
G09     301.4          15.2                6.5 +/-    2.43      16.1 +/-    2.43  0.050 / 0.040
G14     97.7           15.4                6.9 +/-    1.48      17.1 +/-    1.48  0.040 / 0.030
G16     137.1          55.4               10.2 +/-    0.47      12.1 +/-    0.47  0.030 / 0.030
G22     191.2          54.8                9.9 +/-    0.68      11.8 +/-    0.68  0.030 / 0.040
G23     317.5          47.4                7.6 +/-    0.64       9.9 +/-    0.64  0.040 / 0.050
G26     76.8           54.3                7.6 +/-    0.50       9.1 +/-    0.50  0.160 / 0.310
G31     50.9           21.9                5.9 +/-    2.24      12.3 +/-    2.24  0.170 / 0.310