PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-06:57:40
G10     291.9          49.8                5.4 +/-    1.23       6.8 +/-    1.23  0.040 / 0.060
G15     46.8           31.2                3.0 +/-    0.73       5.2 +/-    0.73  0.040 / 0.060
G20     40.1           55.3                4.6 +/-    0.46       5.4 +/-    0.46  0.060 / 0.080
G21     82.2           76.1                4.5 +/-    0.71       4.7 +/-    0.71  0.060 / 0.110
G24     101.3          25.0                4.6 +/-    0.68       9.0 +/-    0.68  0.040 / 0.050
G27     303.8          32.8                5.6 +/-    0.78       9.2 +/-    0.78  0.050 / 0.040
G29     168.5          11.2                4.2 +/-    3.40      11.5 +/-    3.40  0.060 / 0.130
G32     208.9          30.0                5.8 +/-    1.79      10.2 +/-    1.79  0.060 / 0.100