PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-13:58:10
G03     217.8          65.4                9.9 +/-    0.98      10.8 +/-    0.98  0.070 / 0.380
G07     251.0          14.3                4.6 +/-    4.27      11.5 +/-    4.27  0.090 / 0.360
G09     304.4          19.1                7.0 +/-    1.37      15.7 +/-    1.37  0.040 / 0.030
G14     101.9          12.0                9.1 +/-    2.55      24.3 +/-    2.55  0.050 / 0.040
G16     128.5          59.8               11.7 +/-    0.92      13.3 +/-    0.92  0.050 / 0.060
G22     188.5          49.1               10.3 +/-    0.43      13.1 +/-    0.43  0.040 / 0.060
G23     321.6          51.5                9.0 +/-    0.77      11.2 +/-    0.77  0.120 / 0.300
G26     68.0           52.1                8.6 +/-    0.36      10.6 +/-    0.36  0.130 / 0.310
G31     53.6           17.9                7.2 +/-    2.71      16.6 +/-    2.71  0.030 / 0.040