PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-14:58:10
G07     316.4          52.7               10.3 +/-    1.68      12.6 +/-    1.68  0.040 / 0.060
G08     125.2          42.3               13.3 +/-    0.59      18.6 +/-    0.59  0.030 / 0.070
G09     297.7          79.4                9.3 +/-    0.86       9.5 +/-    0.86  0.060 / 0.070
G16     42.4           24.2                5.9 +/-    2.10      11.8 +/-    2.10  0.050 / 0.080
G23     145.9          60.1               13.9 +/-    0.82      15.8 +/-    0.82  0.090 / 0.220
G27     78.0           37.6                9.3 +/-    0.70      14.0 +/-    0.70  0.090 / 0.180
G30     288.9          25.8               11.0 +/-    1.54      21.0 +/-    1.54  0.030 / 0.030