PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/13-08:58:10
G10     267.2          39.1                5.8 +/-    1.07       8.6 +/-    1.07  0.030 / 0.030
G13     41.7           17.7                4.1 +/-    3.35       9.6 +/-    3.35  0.040 / 0.040
G15     58.4           47.9                5.5 +/-    0.95       7.2 +/-    0.95  0.270 / 0.260
G16     284.8          11.5                5.2 +/-    2.45      14.0 +/-    2.45  0.160 / 0.240
G20     298.2          60.5                5.0 +/-    0.80       5.7 +/-    0.80  0.090 / 0.070
G21     14.9           72.9                6.0 +/-    0.87       6.2 +/-    0.87  0.060 / 0.070
G24     118.7          14.4                6.7 +/-    2.94      16.9 +/-    2.94  0.300 / 0.390
G27     319.6          17.0                5.0 +/-    3.04      11.7 +/-    3.04  0.320 / 0.460
G29     164.9          26.3                5.2 +/-    1.31       9.8 +/-    1.31  0.180 / 0.310