PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-17:42:30
G07     329.8          56.7               10.9 +/-    0.43      12.8 +/-    0.43  0.040 / 0.040
G08     107.6          52.0               12.7 +/-    0.69      15.6 +/-    0.69  0.040 / 0.040
G09     196.2          75.7               11.5 +/-    0.31      11.9 +/-    0.31  0.050 / 0.090
G11     148.0          11.7               13.4 +/-    4.45      36.0 +/-    4.45  0.060 / 0.090
G23     153.3          38.5               12.7 +/-    0.71      18.9 +/-    0.71  0.030 / 0.040
G27     56.2           32.2                9.8 +/-    1.22      16.3 +/-    1.22  0.030 / 0.040
G28     236.2          28.6               11.5 +/-    1.82      20.7 +/-    1.82  0.090 / 0.090
G30     301.6          35.3               10.9 +/-    1.28      17.3 +/-    1.28  0.080 / 0.110