PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-07:12:30
G03     189.5          16.0                5.5 +/-    1.32      13.4 +/-    1.32  0.030 / 0.040
G07     297.6          41.9                5.1 +/-    0.99       7.2 +/-    0.99  0.030 / 0.040
G08     134.2          34.3                9.2 +/-    0.57      14.8 +/-    0.57  0.110 / 0.390
G09     319.1          75.6                5.6 +/-    1.04       5.8 +/-    1.04  0.160 / 0.390
G16     41.8           30.7                1.7 +/-    0.80       3.0 +/-    0.80  0.050 / 0.080
G23     132.8          74.0                6.1 +/-    0.76       6.3 +/-    0.76  0.060 / 0.090
G27     92.4           36.2                6.0 +/-    0.95       9.4 +/-    0.95  0.050 / 0.130
G30     278.3          15.4                6.1 +/-    2.40      15.0 +/-    2.40  0.060 / 0.120