PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-07:57:50
G08     293.9          23.1                6.0 +/-    1.49      12.3 +/-    1.49  0.050 / 0.100
G10     9.1            62.8                4.6 +/-    0.57       5.2 +/-    0.57  0.050 / 0.090
G14     229.0          46.7                8.6 +/-    0.86      11.3 +/-    0.86  0.080 / 0.120
G18     317.7          11.0               -6.2 +/-   17.44     -16.8 +/-   17.44  0.100 / 0.130
G20     65.0           52.3                5.6 +/-    0.80       6.8 +/-    0.80  0.040 / 0.030
G21     146.2          39.5                6.6 +/-    0.81       9.7 +/-    0.81  0.030 / 0.030
G24     55.8           25.1                4.8 +/-    0.67       9.4 +/-    0.67  0.080 / 0.100
G27     256.6          32.2                9.8 +/-    1.66      16.4 +/-    1.66  0.050 / 0.090
G32     241.5          62.9               10.2 +/-    0.42      11.3 +/-    0.42  0.080 / 0.150