PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-16:27:40
G07     20.7           68.8               15.3 +/-    0.99      16.3 +/-    0.99  0.040 / 0.060
G08     62.0           48.3                7.6 +/-    9.82       9.7 +/-    9.82  0.030 / 0.050
G09     179.3          47.0               12.0 +/-   10.94      15.7 +/-   10.94  0.030 / 0.030
G11     129.0          28.8               13.2 +/-   11.25      23.7 +/-   11.25  0.030 / 0.040
G18     113.1          11.3               14.8 +/-    2.16      40.2 +/-    2.16  0.040 / 0.060
G23     159.0          14.0               12.8 +/-    9.31      32.5 +/-    9.31  0.030 / 0.050
G27     39.6           15.2                8.8 +/-   10.04      21.8 +/-   10.04  0.110 / 0.180
G28     261.9          47.1               12.1 +/-    9.28      15.9 +/-    9.28  0.120 / 0.160
G30     322.9          52.7                8.1 +/-   10.77       9.9 +/-   10.77  0.140 / 0.370