PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-14:12:40
G03     223.4          67.8                9.0 +/-    0.94       9.7 +/-    0.94  0.130 / 0.320
G07     248.9          12.2                7.2 +/-    4.83      19.1 +/-    4.83  0.170 / 0.280
G09     302.8          17.0                9.1 +/-    5.25      21.5 +/-    5.25  0.290 / 0.230
G14     99.6           13.8                8.3 +/-    3.91      21.2 +/-    3.91  0.130 / 0.230
G16     134.0          57.4               10.1 +/-    0.72      11.8 +/-    0.72  0.030 / 0.050
G22     189.4          51.9               10.3 +/-    0.63      12.8 +/-    0.63  0.040 / 0.050
G23     319.2          49.1                8.7 +/-    0.75      11.1 +/-    0.75  0.180 / 0.460
G26     72.9           53.6                6.0 +/-    1.08       7.3 +/-    1.08  0.180 / 0.450
G31     52.1           20.3                7.4 +/-    2.64      16.2 +/-    2.64  0.040 / 0.060