PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-11:57:40
G01     85.6           31.8                4.6 +/-    1.33       7.8 +/-    1.33  0.090 / 0.120
G07     128.0          40.3                4.9 +/-    0.97       7.0 +/-    0.97  0.080 / 0.120
G11     65.6           39.8                3.1 +/-    0.82       4.5 +/-    0.82  0.060 / 0.060
G13     290.4          37.9                3.9 +/-    0.56       5.9 +/-    0.56  0.060 / 0.060
G15     313.8          10.7               -6.0 +/-   18.83     -16.4 +/-   18.83  0.050 / 0.090
G17     215.9          52.2                4.2 +/-    0.85       5.1 +/-    0.85  0.050 / 0.100
G18     60.2           23.0                2.1 +/-    0.62       4.4 +/-    0.62  0.040 / 0.080
G19     214.8          31.2                3.3 +/-    3.22       5.6 +/-    3.22  0.040 / 0.070
G28     339.9          61.4                3.5 +/-    1.66       4.0 +/-    1.66  0.080 / 0.180
G30     112.7          74.4                5.9 +/-    1.17       6.1 +/-    1.17  0.060 / 0.170