PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-11:57:30
G07     323.7          55.2                3.5 +/-    0.80       4.1 +/-    0.80  0.040 / 0.050
G08     119.3          46.7                7.2 +/-    1.49       9.5 +/-    1.49  0.030 / 0.060
G09     247.4          82.8                4.1 +/-    0.95       4.1 +/-    0.95  0.040 / 0.050
G16     43.8           16.3                2.6 +/-    1.56       6.2 +/-    1.56  0.030 / 0.050
G23     149.6          50.0                7.2 +/-    0.88       9.0 +/-    0.88  0.060 / 0.080
G27     68.3           36.4                4.3 +/-    0.49       6.6 +/-    0.49  0.050 / 0.080
G28     228.5          15.2                5.3 +/-    4.18      13.1 +/-    4.18  0.210 / 0.330
G30     294.3          30.0                4.5 +/-    1.32       7.9 +/-    1.32  0.180 / 0.260