PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/07-13:27:50
G01     55.3           28.2                4.2 +/-    1.82       7.6 +/-    1.82  0.040 / 0.050
G07     143.1          16.1                4.3 +/-    0.94      10.5 +/-    0.94  0.030 / 0.050
G11     46.6           21.6                4.7 +/-    3.22      10.0 +/-    3.22  0.090 / 0.160
G13     256.8          34.6                5.0 +/-    0.83       8.1 +/-    0.83  0.150 / 0.160
G15     290.6          16.1                2.4 +/-    0.96       5.9 +/-    0.96  0.030 / 0.030
G17     261.5          75.1                4.8 +/-    0.47       4.9 +/-    0.47  0.030 / 0.030
G18     39.4           10.0                3.5 +/-    2.34       9.8 +/-    2.34  0.080 / 0.060
G19     236.3          55.7                4.8 +/-    2.05       5.7 +/-    2.05  0.110 / 0.070
G28     31.0           58.7                3.8 +/-    0.78       4.3 +/-    0.78  0.110 / 0.590
G30     146.2          48.4                5.4 +/-    0.48       6.9 +/-    0.48  0.090 / 0.670