PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-06:57:50
G10     266.2          38.6                7.1 +/-    1.37      10.6 +/-    1.37  0.190 / 0.400
G13     42.1           18.4                4.9 +/-    3.09      11.2 +/-    3.09  0.160 / 0.390
G15     59.2           48.4                6.6 +/-    0.81       8.4 +/-    0.81  0.040 / 0.030
G16     284.5          12.0                5.1 +/-    1.62      13.6 +/-    1.62  0.040 / 0.040
G20     296.3          60.0                5.6 +/-    0.89       6.4 +/-    0.89  0.090 / 0.070
G21     7.5            72.0                6.3 +/-    0.74       6.6 +/-    0.74  0.060 / 0.060
G24     120.2          13.8                5.8 +/-    1.56      14.7 +/-    1.56  0.300 / 0.230
G27     319.9          16.5                4.3 +/-    2.47      10.3 +/-    2.47  0.330 / 0.230
G29     165.0          27.9                7.4 +/-    2.02      13.5 +/-    2.02  0.130 / 0.180