PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-08:27:50
G10     266.1          38.5                5.3 +/-    1.38       7.9 +/-    1.38  0.030 / 0.040
G13     42.2           18.5                3.1 +/-    3.10       7.1 +/-    3.10  0.030 / 0.030
G15     59.5           48.6                3.8 +/-    0.91       4.9 +/-    0.91  0.210 / 0.390
G16     285.6          11.8                4.7 +/-    1.20      12.5 +/-    1.20  0.240 / 0.430
G20     296.2          60.0                4.6 +/-    0.82       5.2 +/-    0.82  0.440 / 0.250
G21     10.7           72.3                4.3 +/-    0.59       4.5 +/-    0.59  0.380 / 0.260
G24     119.8          13.8                5.2 +/-    1.91      13.3 +/-    1.91  0.080 / 0.070
G27     320.0          16.3                4.4 +/-    2.83      10.6 +/-    2.83  0.080 / 0.070
G29     164.6          27.1                3.9 +/-    1.26       7.2 +/-    1.26  0.320 / 0.260