PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-20:27:40
G01     128.3          10.7                7.8 +/-   39.76      21.6 +/-   39.76  0.210 / 0.220
G07     46.1           69.8               13.4 +/-    0.43      14.2 +/-    0.43  0.030 / 0.040
G08     54.7           45.1               11.2 +/-    0.68      15.0 +/-    0.68  0.230 / 0.360
G09     179.1          38.6               15.5 +/-    1.22      23.0 +/-    1.22  0.200 / 0.390
G11     122.5          33.8               15.3 +/-    1.71      24.8 +/-    1.71  0.030 / 0.030
G18     105.9          15.7               14.6 +/-    2.10      35.6 +/-    2.10  0.030 / 0.030
G28     274.4          52.4               14.2 +/-    2.75      17.4 +/-    2.75  0.140 / 0.250
G30     334.5          61.1               12.0 +/-    0.80      13.5 +/-    0.80  0.190 / 0.270