PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-08:58:10
G08     265.6          17.6                8.4 +/-    2.06      19.7 +/-    2.06  0.090 / 0.370
G10     65.9           56.6                4.7 +/-    0.70       5.5 +/-    0.70  0.070 / 0.370
G11     309.8          18.8                6.7 +/-    1.54      15.2 +/-    1.54  0.100 / 0.170
G14     271.8          68.0                5.9 +/-    0.67       6.3 +/-    0.67  0.090 / 0.210
G18     310.8          35.2                6.6 +/-    1.95      10.4 +/-    1.95  0.030 / 0.040
G20     97.4           35.2                5.2 +/-    0.77       8.2 +/-    0.77  0.030 / 0.030
G21     154.9          12.5                3.2 +/-    3.01       8.4 +/-    3.01  0.050 / 0.060
G27     231.7          15.3                6.2 +/-    2.08      15.3 +/-    2.08  0.040 / 0.060
G31     178.1          31.9                6.4 +/-    2.69      10.8 +/-    2.69  0.110 / 0.260
G32     327.7          74.0                6.9 +/-    0.43       7.1 +/-    0.43  0.150 / 0.380