PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-18:42:30
G07     20.4           68.7               12.4 +/-    0.99      13.2 +/-    0.99  0.170 / 0.260
G08     63.7           49.7               13.1 +/-    0.76      16.5 +/-    0.76  0.220 / 0.240
G09     180.1          47.7               16.0 +/-    0.85      20.8 +/-    0.85  0.040 / 0.060
G11     129.8          28.5               15.9 +/-    0.75      28.8 +/-    0.75  0.050 / 0.050
G18     113.3          11.3               14.8 +/-    2.11      40.1 +/-    2.11  0.110 / 0.230
G23     158.6          13.1               14.2 +/-    1.66      36.9 +/-    1.66  0.130 / 0.220
G27     39.5           15.0                9.2 +/-    2.81      22.9 +/-    2.81  0.040 / 0.040
G28     262.1          47.2               14.5 +/-    4.10      19.0 +/-    4.10  0.060 / 0.040
G30     324.0          53.6               12.2 +/-    0.49      14.7 +/-    0.49  0.030 / 0.040