PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-09:58:00
G05     46.9           21.7                3.2 +/-    2.14       6.8 +/-    2.14  0.170 / 0.170
G13     86.2           36.6                7.5 +/-    1.17      11.5 +/-    1.17  0.190 / 0.340
G15     131.7          47.4                8.9 +/-    0.48      11.6 +/-    0.48  0.040 / 0.040
G20     0.3            78.2                5.3 +/-    0.35       5.4 +/-    0.35  0.040 / 0.040
G21     307.9          44.2                4.5 +/-    0.72       6.2 +/-    0.72  0.070 / 0.070
G25     203.9          16.9                4.2 +/-    4.41       9.9 +/-    4.41  0.100 / 0.060
G26     295.0          20.4                2.4 +/-    1.27       5.3 +/-    1.27  0.170 / 0.390
G29     145.4          78.9                7.8 +/-    0.61       8.0 +/-    0.61  0.220 / 0.210