PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/07-19:42:20
G10     267.5          38.8               22.7 +/-    1.27      33.7 +/-    1.27  0.040 / 0.030
G13     41.6           17.7               17.3 +/-    2.96      40.3 +/-    2.96  0.040 / 0.040
G15     62.0           52.3               20.0 +/-    0.70      24.6 +/-    0.70  0.140 / 0.310
G20     298.4          60.5               20.3 +/-    0.68      22.9 +/-    0.68  0.160 / 0.250
G21     5.7            72.3               21.4 +/-    0.67      22.4 +/-    0.67  0.090 / 0.230
G24     117.2          14.8               25.9 +/-    2.98      64.8 +/-    2.98  0.150 / 0.280
G29     167.9          31.0               24.2 +/-    1.55      41.6 +/-    1.55  0.030 / 0.040