PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-16:42:50
G02     32.7           55.5                6.1 +/-    0.50       7.2 +/-    0.50  0.030 / 0.030
G05     138.6          64.5                7.1 +/-    1.05       7.8 +/-    1.05  0.030 / 0.040
G06     56.2           12.0                5.5 +/-    0.86      14.8 +/-    0.86  0.030 / 0.050
G12     189.7          61.2                8.4 +/-    0.73       9.5 +/-    0.73  0.030 / 0.050
G19     101.7          11.0                6.8 +/-    2.03      18.7 +/-    2.03  0.030 / 0.060
G25     287.4          57.4                6.4 +/-    1.08       7.4 +/-    1.08  0.040 / 0.050
G29     309.7          30.2                4.8 +/-    0.68       8.4 +/-    0.68  0.130 / 0.180