PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-15:12:30
G03     186.8          12.4               11.9 +/-    1.67      31.4 +/-    1.67  0.140 / 0.130
G07     299.2          42.2               13.5 +/-    2.34      18.9 +/-    2.34  0.100 / 0.160
G08     136.9          34.8               15.0 +/-    0.94      23.9 +/-    0.94  0.070 / 0.100
G09     315.7          72.3               12.3 +/-    0.40      12.9 +/-    0.40  0.060 / 0.090
G16     41.6           28.6                8.7 +/-    1.07      15.7 +/-    1.07  0.260 / 0.330
G23     136.4          66.0               13.5 +/-    0.40      14.7 +/-    0.40  0.210 / 0.370
G27     87.7           36.6               10.9 +/-    0.66      16.8 +/-    0.66  0.090 / 0.170
G30     281.0          18.6               13.6 +/-    1.20      31.0 +/-    1.20  0.120 / 0.180