PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-18:42:30
G07     331.6          57.4               15.0 +/-    0.62      17.5 +/-    0.62  0.040 / 0.040
G08     106.9          52.5               16.8 +/-    0.47      20.6 +/-    0.47  0.040 / 0.040
G09     194.6          74.6               15.2 +/-    1.27      15.7 +/-    1.27  0.060 / 0.070
G11     147.6          12.4               19.8 +/-    3.11      52.3 +/-    3.11  0.060 / 0.080
G23     154.0          38.0               16.2 +/-    0.55      24.3 +/-    0.55  0.040 / 0.040
G27     54.9           31.5               11.7 +/-    1.32      19.9 +/-    1.32  0.050 / 0.040
G28     237.3          29.7               18.2 +/-    1.25      32.0 +/-    1.25  0.090 / 0.100
G30     302.9          36.5               14.8 +/-    1.35      22.9 +/-    1.35  0.100 / 0.080