PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-09:43:10
G03     242.2          70.1                5.8 +/-    0.81       6.1 +/-    0.81  0.040 / 0.060
G09     301.0          14.8                2.3 +/-    1.30       5.7 +/-    1.30  0.050 / 0.050
G14     96.7           16.5                3.5 +/-    1.26       8.5 +/-    1.26  0.040 / 0.040
G16     133.4          55.6                6.7 +/-    0.42       8.0 +/-    0.42  0.050 / 0.050
G22     196.7          57.9                5.3 +/-    1.46       6.1 +/-    1.46  0.130 / 0.410
G23     319.0          49.2                2.6 +/-    0.77       3.3 +/-    0.77  0.130 / 0.420
G26     75.4           53.3                3.7 +/-    0.36       4.4 +/-    0.36  0.060 / 0.060
G31     51.1           21.0               -0.4 +/-    1.62      -0.8 +/-    1.62  0.060 / 0.080