PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-17:58:00
G07     340.3          60.5               10.1 +/-    0.34      11.5 +/-    0.34  0.050 / 0.040
G08     95.4           53.9               13.0 +/-    0.67      15.7 +/-    0.67  0.050 / 0.040
G09     187.0          68.4               12.5 +/-    0.64      13.3 +/-    0.64  0.060 / 0.100
G11     143.6          16.1               13.4 +/-    1.91      32.4 +/-    1.91  0.050 / 0.110
G23     155.5          31.4               11.8 +/-    2.25      20.0 +/-    2.25  0.020 / 0.040
G27     50.1           28.4                9.4 +/-    2.22      17.1 +/-    2.22  0.030 / 0.040
G28     242.0          34.0               11.5 +/-    1.27      18.6 +/-    1.27  0.080 / 0.090
G30     307.2          39.9               10.5 +/-    1.04      15.3 +/-    1.04  0.080 / 0.080