PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-11:57:40
G07     323.7          55.2                3.9 +/-    0.77       4.7 +/-    0.77  0.400 / 0.370
G08     119.3          46.7                6.2 +/-    0.85       8.1 +/-    0.85  0.340 / 0.480
G09     247.4          82.8                7.6 +/-    0.43       7.7 +/-    0.43  0.040 / 0.040
G16     43.8           16.3                3.1 +/-    2.64       7.5 +/-    2.64  0.030 / 0.040
G23     149.6          50.0                5.5 +/-    0.72       7.0 +/-    0.72  0.050 / 0.080
G27     68.3           36.4                6.0 +/-    1.45       9.3 +/-    1.45  0.050 / 0.060
G28     228.5          15.2                4.1 +/-    7.94      10.2 +/-    7.94  0.030 / 0.020
G30     294.3          30.0                5.1 +/-    2.28       9.0 +/-    2.28  0.030 / 0.030