PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-17:58:10
G08     305.6          20.4               10.9 +/-    2.77      23.8 +/-    2.77  0.070 / 0.070
G10     339.4          61.0                9.6 +/-    0.86      10.8 +/-    0.86  0.070 / 0.080
G14     220.9          35.2               13.3 +/-    1.48      21.0 +/-    1.48  0.040 / 0.070
G18     48.4           56.2               10.2 +/-    0.54      12.0 +/-    0.54  0.040 / 0.070
G21     137.8          47.0               14.1 +/-    2.30      18.5 +/-    2.30  0.070 / 0.080
G24     70.1           30.1               11.7 +/-    1.02      20.5 +/-    1.02  0.060 / 0.080
G27     267.4          36.6               11.1 +/-    1.17      17.2 +/-    1.17  0.030 / 0.040
G32     227.8          55.6               13.4 +/-    1.70      15.9 +/-    1.70  0.030 / 0.050