PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-17:57:30
G07     354.5          64.0               11.2 +/-    0.64      12.3 +/-    0.64  0.040 / 0.040
G08     87.2           52.0               12.9 +/-    0.96      15.9 +/-    0.96  0.040 / 0.040
G09     187.3          68.5               11.7 +/-    0.70      12.5 +/-    0.70  0.120 / 0.110
G11     140.7          17.9               12.3 +/-    2.77      28.5 +/-    2.77  0.090 / 0.160
G23     157.4          35.9               12.8 +/-    1.16      20.0 +/-    1.16  0.030 / 0.030
G27     51.3           29.8               10.8 +/-    1.36      19.0 +/-    1.36  0.040 / 0.020
G28     240.5          30.0               13.3 +/-    1.53      23.3 +/-    1.53  0.070 / 0.100
G30     307.5          40.3               10.8 +/-    1.62      15.6 +/-    1.62  0.060 / 0.120