PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-13:28:00
G07     4.2            65.8                7.1 +/-    0.74       7.8 +/-    0.74  0.110 / 0.130
G08     81.0           52.8                5.7 +/-    1.47       6.9 +/-    1.47  0.170 / 0.140
G09     183.8          62.3                8.0 +/-    0.72       8.9 +/-    0.72  0.110 / 0.210
G11     137.6          21.6                6.3 +/-    2.03      13.4 +/-    2.03  0.090 / 0.190
G23     157.6          27.2                6.7 +/-    1.31      12.4 +/-    1.31  0.030 / 0.030
G27     46.5           25.5                6.9 +/-    2.29      13.4 +/-    2.29  0.030 / 0.040
G28     244.9          33.2                5.8 +/-    1.59       9.5 +/-    1.59  0.150 / 0.090
G30     313.3          45.6                6.6 +/-    0.94       8.8 +/-    0.94  0.110 / 0.110