PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-21:12:30
G07     316.1          50.7               10.6 +/-    1.13      13.3 +/-    1.13  0.270 / 0.280
G08     122.0          46.1               15.9 +/-    0.61      21.1 +/-    0.61  0.140 / 0.420
G09     258.0          82.6               14.3 +/-    0.85      14.4 +/-    0.85  0.040 / 0.070
G16     43.4           17.4                9.2 +/-    3.31      21.5 +/-    3.31  0.060 / 0.050
G23     149.4          52.8               13.9 +/-    0.57      17.0 +/-    0.57  0.050 / 0.050
G27     67.7           35.9               11.6 +/-    1.05      18.2 +/-    1.05  0.040 / 0.050
G28     228.9          20.2               14.7 +/-    2.03      32.2 +/-    2.03  0.260 / 0.540
G30     294.2          30.4               12.1 +/-    1.84      21.0 +/-    1.84  0.150 / 0.400