PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-17:12:30
G07     20.5           68.8               12.3 +/-    0.86      13.1 +/-    0.86  0.070 / 0.070
G08     62.5           48.8               12.9 +/-    0.50      16.5 +/-    0.50  0.050 / 0.050
G09     179.6          47.3               13.9 +/-    1.01      18.2 +/-    1.01  0.030 / 0.030
G11     129.2          28.7               13.1 +/-    0.92      23.5 +/-    0.92  0.030 / 0.040
G18     113.2          11.3               14.1 +/-    2.93      38.3 +/-    2.93  0.040 / 0.050
G23     158.8          13.4               12.5 +/-    2.15      32.2 +/-    2.15  0.040 / 0.060
G27     39.5           15.1               10.2 +/-    2.18      25.2 +/-    2.18  0.180 / 0.380
G28     262.0          47.1               15.3 +/-    4.20      20.0 +/-    4.20  0.170 / 0.290
G30     323.2          53.0               12.1 +/-    0.48      14.8 +/-    0.48  0.080 / 0.200