PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/10-07:42:30
G07     354.3          64.0                2.6 +/-    0.75       2.8 +/-    0.75  0.030 / 0.040
G08     78.2           51.2                4.2 +/-    1.00       5.3 +/-    1.00  0.030 / 0.040
G09     180.8          61.1                7.2 +/-    0.97       8.1 +/-    0.97  0.050 / 0.100
G11     137.4          19.6                4.5 +/-    1.12      10.0 +/-    1.12  0.050 / 0.100
G23     158.9          32.5                6.3 +/-    1.45      10.5 +/-    1.45  0.030 / 0.040
G27     46.0           24.4                2.7 +/-    1.99       5.3 +/-    1.99  0.030 / 0.040
G28     247.0          38.1                5.3 +/-    1.78       7.9 +/-    1.78  0.030 / 0.050
G30     310.0          41.6                2.1 +/-    1.80       2.9 +/-    1.80  0.040 / 0.050