PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-16:57:50
G07     329.8          56.7               10.5 +/-    0.93      12.3 +/-    0.93  0.040 / 0.050
G08     106.6          51.9               12.6 +/-    0.56      15.5 +/-    0.56  0.030 / 0.050
G09     195.4          75.5               11.8 +/-    0.86      12.1 +/-    0.86  0.030 / 0.050
G11     147.8          11.8               14.0 +/-    1.94      37.5 +/-    1.94  0.040 / 0.050
G23     153.3          38.4               14.4 +/-    0.86      21.6 +/-    0.86  0.060 / 0.090
G27     56.3           32.2                8.8 +/-    0.59      14.8 +/-    0.59  0.060 / 0.090
G28     236.2          28.5               15.2 +/-    2.08      27.5 +/-    2.08  0.090 / 0.190
G30     301.3          34.9               10.0 +/-    1.41      15.9 +/-    1.41  0.070 / 0.180