PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-19:28:00
G03     232.4          68.2                9.4 +/-    0.49      10.0 +/-    0.49  0.040 / 0.040
G09     302.7          16.7                8.5 +/-    2.06      20.2 +/-    2.06  0.050 / 0.050
G14     98.9           16.0                9.6 +/-    1.53      23.4 +/-    1.53  0.260 / 0.290
G16     129.6          58.6               11.4 +/-    0.66      13.1 +/-    0.66  0.310 / 0.260
G22     193.8          55.4               10.2 +/-    0.54      12.1 +/-    0.54  0.030 / 0.040
G23     319.7          49.6               10.0 +/-    0.62      12.6 +/-    0.62  0.030 / 0.040
G26     69.7           51.7                8.0 +/-    0.65       9.9 +/-    0.65  0.110 / 0.280
G31     52.0           19.7                7.2 +/-    2.46      16.0 +/-    2.46  0.120 / 0.240