PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-12:27:50
G01     244.4          32.6                5.9 +/-    0.93       9.9 +/-    0.93  0.050 / 0.060
G03     314.1          54.4                1.9 +/-    1.47       2.3 +/-    1.47  0.060 / 0.060
G14     65.8           37.1                3.8 +/-    0.77       5.8 +/-    0.77  0.070 / 0.100
G16     163.0          20.9                4.6 +/-    1.38      10.0 +/-    1.38  0.080 / 0.090
G18     214.9          22.4                5.8 +/-    1.44      12.0 +/-    1.44  0.030 / 0.040
G22     287.1          74.9                5.3 +/-    0.88       5.5 +/-    0.88  0.040 / 0.040
G23     290.8          23.0                5.0 +/-    1.27      10.3 +/-    1.27  0.050 / 0.110
G26     134.5          41.5                7.7 +/-    0.94      10.9 +/-    0.94  0.050 / 0.110
G31     40.7           53.7                4.0 +/-    0.42       4.8 +/-    0.42  0.090 / 0.250
G32     79.3           23.7                4.5 +/-    0.62       9.1 +/-    0.62  0.090 / 0.250