PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-18:27:50
G07     315.2          50.3               14.4 +/-    1.10      18.0 +/-    1.10  0.050 / 0.050
G08     125.4          45.4               18.7 +/-    0.33      25.0 +/-    0.33  0.050 / 0.050
G09     260.9          82.7               16.4 +/-    1.50      16.5 +/-    1.50  0.040 / 0.060
G16     43.3           16.8               10.1 +/-    2.54      24.0 +/-    2.54  0.040 / 0.060
G23     148.5          51.4               17.1 +/-    0.84      21.2 +/-    0.84  0.060 / 0.060
G27     68.7           36.2               14.3 +/-    0.95      22.3 +/-    0.95  0.030 / 0.070
G28     228.5          19.5               16.5 +/-    1.25      36.9 +/-    1.25  0.110 / 0.330
G30     292.8          28.5               12.4 +/-    2.03      22.3 +/-    2.03  0.240 / 0.480