PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-19:58:10
G07     322.8          53.8               12.2 +/-    0.43      14.7 +/-    0.43  0.070 / 0.070
G08     116.3          49.4               13.2 +/-    0.62      16.8 +/-    0.62  0.080 / 0.080
G09     216.5          80.6               13.4 +/-    0.40      13.6 +/-    0.40  0.030 / 0.030
G16     44.9           12.3                7.7 +/-    2.85      20.3 +/-    2.85  0.030 / 0.020
G23     151.9          46.0               13.5 +/-    0.53      17.9 +/-    0.53  0.200 / 0.270
G27     61.4           34.3               11.0 +/-    1.36      17.7 +/-    1.36  0.250 / 0.360
G28     232.5          24.6               16.6 +/-    2.92      32.8 +/-    2.92  0.030 / 0.070
G30     298.1          33.1               10.0 +/-    1.95      16.4 +/-    1.95  0.050 / 0.060