PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/30-11:42:50
G01     60.2           30.1                4.4 +/-    1.08       7.7 +/-    1.08  0.070 / 0.130
G07     141.1          21.3                4.7 +/-    2.03      10.0 +/-    2.03  0.070 / 0.150
G11     48.9           26.1                2.9 +/-    2.09       5.5 +/-    2.09  0.070 / 0.070
G13     262.7          36.6                6.6 +/-    2.17      10.1 +/-    2.17  0.080 / 0.120
G15     295.9          15.8                3.1 +/-    1.82       7.5 +/-    1.82  0.040 / 0.030
G17     247.4          72.8                4.5 +/-    0.69       4.7 +/-    0.69  0.030 / 0.030
G18     42.4           13.3                1.4 +/-    2.73       3.7 +/-    2.73  0.120 / 0.210
G19     230.6          51.5                6.1 +/-    2.89       7.6 +/-    2.89  0.100 / 0.210
G28     21.1           60.0                5.3 +/-    0.71       6.0 +/-    0.71  0.120 / 0.320
G30     143.2          54.6                5.1 +/-    0.42       6.2 +/-    0.42  0.070 / 0.140