PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/31-09:28:00
G01     123.8          12.8                3.3 +/-    1.86       8.6 +/-    1.86  0.030 / 0.040
G07     65.4           67.8                4.9 +/-    0.50       5.3 +/-    0.50  0.030 / 0.040
G08     50.8           41.0                3.5 +/-    0.71       5.0 +/-    0.71  0.120 / 0.350
G09     177.4          33.8                5.9 +/-    1.04       9.6 +/-    1.04  0.150 / 0.410
G11     117.1          37.5                5.5 +/-    1.07       8.4 +/-    1.07  0.060 / 0.070
G13     320.0          14.7                1.1 +/-    1.78       2.8 +/-    1.78  0.070 / 0.090
G17     200.6          14.2                3.4 +/-    1.92       8.6 +/-    1.92  0.120 / 0.360
G18     100.8          17.7                4.2 +/-    1.19       9.9 +/-    1.19  0.100 / 0.350
G28     272.0          48.7                5.6 +/-    0.64       7.2 +/-    0.64  0.050 / 0.100
G30     333.9          61.9                3.8 +/-    0.71       4.2 +/-    0.71  0.050 / 0.110