PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-18:42:40
G07     20.4           68.7               10.9 +/-    1.15      11.6 +/-    1.15  0.040 / 0.070
G08     63.7           49.7               12.7 +/-    0.55      16.0 +/-    0.55  0.040 / 0.060
G09     180.1          47.7               15.5 +/-    1.42      20.1 +/-    1.42  0.100 / 0.300
G11     129.8          28.5               15.6 +/-    0.71      28.3 +/-    0.71  0.080 / 0.360
G18     113.3          11.3               14.2 +/-    1.41      38.5 +/-    1.41  0.050 / 0.110
G23     158.6          13.1               14.7 +/-    4.12      38.3 +/-    4.12  0.050 / 0.080
G27     39.5           15.0                9.9 +/-    1.21      24.6 +/-    1.21  0.040 / 0.050
G28     262.1          47.2               14.9 +/-    1.37      19.5 +/-    1.37  0.030 / 0.040
G30     324.0          53.6               12.6 +/-    1.16      15.3 +/-    1.16  0.100 / 0.220