PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-08:27:50
G07     347.7          62.3                5.9 +/-    1.00       6.6 +/-    1.00  0.080 / 0.080
G08     84.3           51.6                7.4 +/-    0.95       9.1 +/-    0.95  0.070 / 0.090
G09     181.4          64.9                7.2 +/-    0.76       7.8 +/-    0.76  0.080 / 0.080
G11     139.7          17.2                7.1 +/-    2.40      16.7 +/-    2.40  0.080 / 0.060
G23     158.0          36.5                9.3 +/-    1.19      14.4 +/-    1.19  0.030 / 0.030
G27     48.6           26.8                4.0 +/-    1.95       7.4 +/-    1.95  0.040 / 0.030
G28     243.5          35.3                8.9 +/-    1.94      14.1 +/-    1.94  0.040 / 0.050
G30     306.7          38.6                3.7 +/-    1.97       5.5 +/-    1.97  0.040 / 0.050