PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-07:27:40
G07     346.5          62.5                4.1 +/-    0.66       4.6 +/-    0.66  0.030 / 0.040
G08     93.1           53.5                6.4 +/-    1.04       7.8 +/-    1.04  0.030 / 0.040
G09     183.1          66.7                5.2 +/-    0.51       5.6 +/-    0.51  0.090 / 0.130
G11     142.9          17.6                5.4 +/-    1.02      12.5 +/-    1.02  0.080 / 0.190
G23     156.7          33.9                5.7 +/-    0.89       9.3 +/-    0.89  0.030 / 0.030
G27     50.2           28.5                2.9 +/-    2.15       5.3 +/-    2.15  0.030 / 0.020
G28     239.7          27.5                5.5 +/-    2.17      10.2 +/-    2.17  0.080 / 0.280
G30     305.9          38.2                3.6 +/-    1.53       5.4 +/-    1.53  0.080 / 0.150