PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-09:57:30
G07     20.8           68.1                3.8 +/-    0.49       4.0 +/-    0.49  0.050 / 0.040
G08     70.2           52.0                4.1 +/-    0.73       5.0 +/-    0.73  0.040 / 0.050
G09     179.8          51.6                6.3 +/-    0.97       7.8 +/-    0.97  0.030 / 0.030
G11     131.9          27.4                3.6 +/-    1.42       6.6 +/-    1.42  0.030 / 0.030
G23     158.9          18.3                4.4 +/-    1.57      10.0 +/-    1.57  0.200 / 0.160
G27     41.3           18.7                3.3 +/-    1.78       7.5 +/-    1.78  0.160 / 0.180
G28     253.0          38.6                4.1 +/-    1.27       6.1 +/-    1.27  0.040 / 0.050
G30     318.7          49.6                2.7 +/-    0.60       3.5 +/-    0.60  0.040 / 0.050