PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-13:27:50
G03     233.9          70.3                9.0 +/-    0.77       9.5 +/-    0.77  0.040 / 0.030
G09     300.6          14.3                6.4 +/-    2.24      16.3 +/-    2.24  0.030 / 0.030
G14     96.7           16.2                8.1 +/-    2.17      19.6 +/-    2.17  0.040 / 0.050
G16     138.4          54.4               10.7 +/-    0.44      12.8 +/-    0.44  0.050 / 0.050
G22     192.2          56.3                9.3 +/-    0.38      11.0 +/-    0.38  0.120 / 0.220
G23     316.6          46.5                7.6 +/-    0.96      10.0 +/-    0.96  0.120 / 0.310
G26     78.8           54.6                8.3 +/-    0.49       9.9 +/-    0.49  0.050 / 0.040
G31     50.4           22.8                6.4 +/-    2.10      13.2 +/-    2.10  0.040 / 0.050