PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-16:57:50
G08     267.3          17.4                7.5 +/-    1.99      17.5 +/-    1.99  0.150 / 0.170
G10     63.1           58.3                5.3 +/-    0.50       6.1 +/-    0.50  0.190 / 0.170
G11     311.7          16.7                5.9 +/-    3.18      14.0 +/-    3.18  0.070 / 0.130
G14     269.5          66.4                5.4 +/-    0.55       5.8 +/-    0.55  0.040 / 0.100
G18     94.5           33.3                6.1 +/-    0.71      10.0 +/-    0.71  0.280 / 0.450
G21     153.7          10.6                8.8 +/-   10.38      24.1 +/-   10.38  0.270 / 0.370
G27     229.7          14.5                8.4 +/-    2.47      21.2 +/-    2.47  0.030 / 0.050
G31     178.4          31.6                8.0 +/-    2.92      13.6 +/-    2.92  0.040 / 0.050
G32     343.7          73.4                5.5 +/-    0.58       5.7 +/-    0.58  0.020 / 0.020