PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-19:42:30
G01     319.4          16.7                9.8 +/-    2.37      23.3 +/-    2.37  0.130 / 0.260
G08     258.7          13.8               10.3 +/-    1.52      26.4 +/-    1.52  0.130 / 0.220
G10     76.9           54.6               10.4 +/-    0.75      12.5 +/-    0.75  0.050 / 0.080
G11     304.8          22.1                8.3 +/-    1.61      17.3 +/-    1.61  0.050 / 0.070
G14     293.3          70.4               11.0 +/-    0.64      11.6 +/-    0.64  0.030 / 0.020
G18     101.3          28.5               10.4 +/-    0.61      18.7 +/-    0.61  0.030 / 0.030
G31     178.0          38.9               15.0 +/-    1.37      22.1 +/-    1.37  0.050 / 0.050
G32     1.9            68.9               11.5 +/-    0.71      12.2 +/-    0.71  0.060 / 0.050