PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-21:57:50
G07     314.0          49.7               11.4 +/-    0.99      14.4 +/-    0.99  0.170 / 0.230
G08     123.5          45.0               14.0 +/-    0.37      18.9 +/-    0.37  0.080 / 0.220
G09     273.3          82.1               14.1 +/-    1.26      14.2 +/-    1.26  0.200 / 0.250
G16     42.9           19.4               11.0 +/-    3.90      24.5 +/-    3.90  0.190 / 0.590
G23     148.5          55.3               13.7 +/-    0.67      16.3 +/-    0.67  0.040 / 0.060
G27     69.9           36.3               11.5 +/-    1.76      17.9 +/-    1.76  0.040 / 0.060
G28     227.8          18.7               12.2 +/-    1.49      27.7 +/-    1.49  0.050 / 0.060
G30     292.9          29.7               11.4 +/-    1.85      20.1 +/-    1.85  0.040 / 0.070