PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/24-16:42:40
G07     18.9           68.6               12.3 +/-    0.73      13.1 +/-    0.73  0.060 / 0.060
G08     63.0           48.8               12.7 +/-    0.76      16.2 +/-    0.76  0.070 / 0.050
G09     179.5          47.8               13.7 +/-    1.12      17.8 +/-    1.12  0.040 / 0.020
G11     129.6          28.3               13.4 +/-    1.87      24.3 +/-    1.87  0.030 / 0.040
G18     113.6          11.0               13.0 +/-    2.94      35.5 +/-    2.94  0.040 / 0.040
G23     158.9          14.4               11.9 +/-    1.11      30.1 +/-    1.11  0.030 / 0.050
G27     39.8           15.7                9.7 +/-    1.96      23.8 +/-    1.96  0.210 / 0.380
G28     261.2          46.7               13.5 +/-    4.25      17.8 +/-    4.25  0.190 / 0.290
G30     322.4          52.3               11.7 +/-    0.56      14.4 +/-    0.56  0.170 / 0.330