PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-07:27:50
G03     247.8          70.1                4.1 +/-    0.31       4.3 +/-    0.31  0.110 / 0.300
G09     300.9          14.9                3.2 +/-    2.25       7.9 +/-    2.25  0.110 / 0.250
G14     96.1           17.4                2.5 +/-    1.82       5.8 +/-    1.82  0.040 / 0.050
G16     132.0          55.5                5.0 +/-    0.89       6.0 +/-    0.89  0.040 / 0.050
G22     199.4          59.2                4.6 +/-    0.66       5.3 +/-    0.66  0.090 / 0.290
G23     319.9          50.2                3.5 +/-    0.83       4.4 +/-    0.83  0.100 / 0.220
G26     75.3           53.0                4.7 +/-    0.65       5.8 +/-    0.65  0.040 / 0.040
G31     51.0           20.9                3.0 +/-    2.59       6.5 +/-    2.59  0.040 / 0.050