PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-20:58:00
G01     294.4          39.1               10.6 +/-    1.70      15.6 +/-    1.70  0.070 / 0.120
G03     310.9          14.6                9.3 +/-    2.61      23.3 +/-    2.61  0.060 / 0.120
G10     117.3          31.6               13.4 +/-    0.63      22.8 +/-    0.63  0.050 / 0.080
G11     268.9          27.0               11.1 +/-    1.66      20.8 +/-    1.66  0.050 / 0.080
G14     20.2           60.3               10.6 +/-    0.65      12.0 +/-    0.65  0.070 / 0.130
G22     313.1          35.2               10.9 +/-    1.29      17.2 +/-    1.29  0.070 / 0.120
G25     69.4           18.7               11.3 +/-    0.93      25.7 +/-    0.93  0.020 / 0.030
G26     159.8          10.2              -12.7 +/-   41.60     -35.4 +/-   41.60  0.020 / 0.030
G31     151.4          76.4               13.5 +/-    1.04      13.8 +/-    1.04  0.040 / 0.060
G32     47.5           44.8                9.8 +/-    0.52      13.3 +/-    0.52  0.040 / 0.050