PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-19:27:30
G03     232.4          68.2                7.8 +/-    0.99       8.3 +/-    0.99  0.040 / 0.060
G09     302.7          16.7                7.2 +/-    2.15      17.1 +/-    2.15  0.050 / 0.060
G14     98.9           16.0               10.3 +/-    1.43      25.0 +/-    1.43  0.030 / 0.050
G16     129.6          58.6               11.6 +/-    0.60      13.3 +/-    0.60  0.030 / 0.050
G22     193.8          55.4               12.1 +/-    1.06      14.4 +/-    1.06  0.110 / 0.160
G23     319.7          49.6                9.0 +/-    0.53      11.4 +/-    0.53  0.100 / 0.160
G26     69.7           51.7                8.9 +/-    0.70      10.9 +/-    0.70  0.090 / 0.400
G31     52.0           19.7                7.1 +/-    1.43      15.8 +/-    1.43  0.100 / 0.290