PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-20:58:10
G10     257.4          32.1               11.0 +/-    1.26      18.5 +/-    1.26  0.110 / 0.520
G13     47.4           25.0                8.9 +/-    2.68      17.4 +/-    2.68  0.140 / 0.450
G15     80.1           59.0                9.9 +/-    0.86      11.3 +/-    0.86  0.040 / 0.050
G16     287.5          14.8                6.0 +/-    1.78      14.9 +/-    1.78  0.040 / 0.040
G20     280.7          55.4                9.3 +/-    2.43      11.1 +/-    2.43  0.230 / 0.140
G21     344.2          65.4               10.2 +/-    0.80      11.1 +/-    0.80  0.120 / 0.210
G26     260.6          12.3               10.4 +/-    1.89      27.6 +/-    1.89  0.030 / 0.030
G29     166.6          42.1               11.2 +/-    0.75      15.8 +/-    0.75  0.030 / 0.040