PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-22:43:00
G07     353.1          64.1               10.0 +/-    0.50      11.0 +/-    0.50  0.040 / 0.090
G08     80.9           53.3               10.1 +/-    0.82      12.2 +/-    0.82  0.070 / 0.090
G09     183.9          61.3               12.1 +/-    0.36      13.6 +/-    0.36  0.040 / 0.040
G11     140.1          20.1               13.2 +/-    2.97      28.9 +/-    2.97  0.040 / 0.030
G23     158.2          27.6               11.3 +/-    1.21      20.7 +/-    1.21  0.100 / 0.130
G27     45.0           23.5                7.7 +/-    2.22      15.6 +/-    2.22  0.080 / 0.120
G28     248.7          39.5               11.8 +/-    1.17      17.3 +/-    1.17  0.080 / 0.140
G30     315.3          47.1                9.7 +/-    0.90      12.8 +/-    0.90  0.070 / 0.140