PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-12:27:50
G01     235.7          26.5                7.3 +/-    2.00      13.9 +/-    2.00  0.050 / 0.030
G03     306.5          62.8                6.7 +/-    0.80       7.5 +/-    0.80  0.050 / 0.030
G14     74.7           31.6                5.6 +/-    1.43       9.4 +/-    1.43  0.160 / 0.180
G16     158.4          29.8                5.8 +/-    1.18      10.2 +/-    1.18  0.120 / 0.150
G18     209.3          15.4                5.5 +/-    2.58      13.6 +/-    2.58  0.040 / 0.040
G22     247.4          77.2                7.1 +/-    0.42       7.3 +/-    0.42  0.040 / 0.040
G23     297.7          28.9                5.7 +/-    1.91      10.3 +/-    1.91  0.090 / 0.140
G26     123.4          48.5                7.2 +/-    0.77       9.3 +/-    0.77  0.070 / 0.140
G31     41.5           44.5                4.5 +/-    0.91       6.1 +/-    0.91  0.070 / 0.150
G32     87.1           17.9                4.0 +/-    2.22       9.3 +/-    2.22  0.080 / 0.120