PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/02-02:58:00
G10     285.5          47.4                9.9 +/-    2.87      12.9 +/-    2.87  0.090 / 0.090
G15     48.8           37.4                7.3 +/-    1.39      11.1 +/-    1.39  0.070 / 0.100
G20     317.7          62.4               12.6 +/-    0.41      14.0 +/-    0.41  0.040 / 0.040
G21     57.7           77.6                9.8 +/-    0.49      10.0 +/-    0.49  0.040 / 0.040
G24     105.4          22.7                9.3 +/-    1.37      19.2 +/-    1.37  0.150 / 0.370
G27     308.7          29.8                9.4 +/-    0.98      16.5 +/-    0.98  0.150 / 0.340
G29     169.0          16.3               10.6 +/-    1.79      25.5 +/-    1.79  0.040 / 0.050
G32     207.2          25.4               12.2 +/-    1.06      23.6 +/-    1.06  0.040 / 0.050