PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-15:12:50
G07     322.6          55.1                9.0 +/-    0.97      10.7 +/-    0.97  0.240 / 0.750
G08     119.6          45.4               12.5 +/-    0.80      16.8 +/-    0.80  0.210 / 0.580
G09     271.4          82.3                9.8 +/-    1.20       9.9 +/-    1.20  0.040 / 0.060
G16     43.1           20.3                7.9 +/-    0.88      17.4 +/-    0.88  0.040 / 0.060
G23     149.0          55.3               11.4 +/-    1.15      13.6 +/-    1.15  0.040 / 0.040
G27     72.0           37.2                8.1 +/-    0.62      12.3 +/-    0.62  0.040 / 0.030
G28     227.1          13.9                7.9 +/-    3.70      20.1 +/-    3.70  0.070 / 0.080
G30     292.4          28.6                7.3 +/-    1.50      13.2 +/-    1.50  0.090 / 0.090