PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-18:28:00
G03     216.5          62.2               11.7 +/-    1.19      13.1 +/-    1.19  0.110 / 0.310
G07     254.2          15.6               10.3 +/-    1.45      25.4 +/-    1.45  0.160 / 0.370
G09     307.6          23.9                8.4 +/-    1.69      16.8 +/-    1.69  0.080 / 0.120
G16     119.7          63.1               11.5 +/-    0.63      12.8 +/-    0.63  0.080 / 0.130
G22     189.1          45.7               12.4 +/-    0.62      16.6 +/-    0.62  0.040 / 0.040
G23     324.0          54.0                9.9 +/-    0.53      11.9 +/-    0.53  0.040 / 0.050
G26     64.1           51.8                9.3 +/-    0.99      11.4 +/-    0.99  0.050 / 0.030
G31     55.5           16.7                8.9 +/-    2.82      21.2 +/-    2.82  0.040 / 0.040