PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-19:43:00
G01     319.9          15.2                8.2 +/-    1.95      20.4 +/-    1.95  0.060 / 0.070
G08     260.3          14.7               11.4 +/-    1.64      28.5 +/-    1.64  0.060 / 0.080
G10     73.9           55.5                7.7 +/-    0.41       9.2 +/-    0.41  0.020 / 0.020
G11     306.3          21.2               10.0 +/-    2.02      21.3 +/-    2.02  0.030 / 0.020
G14     287.8          69.9                8.5 +/-    0.59       9.0 +/-    0.59  0.110 / 0.350
G18     99.7           29.8                9.7 +/-    0.71      17.1 +/-    0.71  0.130 / 0.260
G31     178.4          36.8               11.9 +/-    1.07      18.2 +/-    1.07  0.050 / 0.040
G32     357.6          70.1                7.6 +/-    0.38       8.0 +/-    0.38  0.060 / 0.040