PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-12:58:00
G01     221.5          13.0                5.3 +/-    4.30      13.8 +/-    4.30  0.160 / 0.550
G03     255.8          72.5                7.4 +/-    0.77       7.8 +/-    0.77  0.160 / 0.450
G09     296.9          10.1              -16.2 +/-   16.51     -45.2 +/-   16.51  0.040 / 0.040
G14     91.6           20.0                8.4 +/-    1.43      18.4 +/-    1.43  0.030 / 0.050
G16     145.1          48.7                9.3 +/-    1.27      11.9 +/-    1.27  0.040 / 0.040
G22     197.6          62.9                9.6 +/-    0.71      10.6 +/-    0.71  0.040 / 0.050
G23     312.1          42.1                6.9 +/-    1.23       9.7 +/-    1.23  0.120 / 0.200
G26     90.1           55.4                8.6 +/-    0.84      10.2 +/-    0.84  0.110 / 0.220
G31     47.7           27.6                5.8 +/-    1.61      10.7 +/-    1.61  0.050 / 0.110