PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-20:27:40
G10     251.4          27.6               13.1 +/-    1.77      24.1 +/-    1.77  0.040 / 0.040
G13     52.5           29.1               10.6 +/-    1.99      18.9 +/-    1.99  0.030 / 0.050
G15     93.9           60.1               12.7 +/-    0.57      14.4 +/-    0.57  0.110 / 0.340
G16     294.1          15.6                9.6 +/-    2.30      23.6 +/-    2.30  0.110 / 0.380
G20     271.1          51.4               12.7 +/-    2.86      15.8 +/-    2.86  0.080 / 0.150
G21     335.2          60.9               12.0 +/-    0.73      13.5 +/-    0.73  0.080 / 0.160
G26     266.7          15.2               11.4 +/-    2.29      28.1 +/-    2.29  0.030 / 0.040
G29     165.1          49.4               13.7 +/-    0.72      17.4 +/-    0.72  0.030 / 0.030