PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-12:12:50
G01     72.5           32.4                2.8 +/-    0.92       4.6 +/-    0.92  0.030 / 0.030
G07     135.5          30.7                4.1 +/-    1.45       7.1 +/-    1.45  0.030 / 0.030
G11     55.5           33.6                3.4 +/-    1.66       5.6 +/-    1.66  0.040 / 0.040
G13     276.5          38.8                5.7 +/-    1.00       8.4 +/-    1.00  0.050 / 0.060
G15     305.2          14.3                1.9 +/-    1.88       4.7 +/-    1.88  0.050 / 0.070
G17     226.7          62.8                5.9 +/-    1.05       6.6 +/-    1.05  0.050 / 0.090
G18     50.3           19.1                3.6 +/-    1.37       8.1 +/-    1.37  0.070 / 0.190
G19     221.3          41.4                6.3 +/-    1.16       8.9 +/-    1.16  0.100 / 0.210
G28     1.1            61.4                3.4 +/-    0.96       3.8 +/-    0.96  0.090 / 0.090
G30     132.8          64.7                4.2 +/-    0.39       4.6 +/-    0.39  0.080 / 0.100