PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-14:27:40
G01     220.4          11.8                7.0 +/-    1.81      18.9 +/-    1.81  0.050 / 0.040
G03     248.9          72.1                7.2 +/-    0.71       7.5 +/-    0.71  0.040 / 0.040
G09     298.1          11.5               -3.9 +/-   27.77     -10.6 +/-   27.77  0.170 / 0.290
G14     93.2           18.8                6.9 +/-    1.05      15.6 +/-    1.05  0.390 / 0.450
G16     144.9          50.0                8.3 +/-    0.56      10.4 +/-    0.56  0.120 / 0.250
G22     194.0          60.3                8.5 +/-    0.43       9.6 +/-    0.43  0.130 / 0.270
G23     312.9          42.7              -13.5 +/-    1.20     -18.8 +/-    1.20  0.040 / 0.120
G26     88.0           55.7                5.9 +/-    0.64       6.9 +/-    0.64  0.080 / 0.080
G31     48.2           26.8                4.6 +/-    2.92       8.6 +/-    2.92  0.050 / 0.040