PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-07:28:10
G08     319.4          12.5                3.0 +/-    1.51       7.9 +/-    1.51  0.060 / 0.080
G10     310.0          55.9                5.4 +/-    0.84       6.3 +/-    0.84  0.060 / 0.090
G14     211.9          19.0                2.8 +/-    3.31       6.3 +/-    3.31  0.040 / 0.040
G15     45.5           20.5                2.6 +/-    0.84       5.7 +/-    0.84  0.030 / 0.050
G20     10.2           64.3                4.8 +/-    0.55       5.3 +/-    0.55  0.040 / 0.040
G21     116.3          67.2                6.6 +/-    1.43       7.1 +/-    1.43  0.030 / 0.040
G24     88.4           28.5                5.0 +/-    0.84       9.0 +/-    0.84  0.090 / 0.130
G27     293.9          36.0                5.8 +/-    1.54       9.0 +/-    1.54  0.090 / 0.130
G32     214.4          34.3                7.8 +/-    0.99      12.5 +/-    0.99  0.170 / 0.810