PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-17:43:10
G08     308.4          19.3                8.4 +/-    1.57      18.8 +/-    1.57  0.070 / 0.070
G10     333.4          60.1                6.4 +/-    0.46       7.2 +/-    0.46  0.070 / 0.090
G14     219.0          32.3                8.1 +/-    1.81      13.6 +/-    1.81  0.030 / 0.060
G18     43.8           57.6                7.0 +/-    0.48       8.1 +/-    0.48  0.040 / 0.060
G24     73.6           30.4                8.8 +/-    0.66      15.3 +/-    0.66  0.020 / 0.040
G27     271.4          37.3                8.4 +/-    0.94      12.8 +/-    0.94  0.030 / 0.030
G32     224.8          52.7                8.8 +/-    2.29      10.7 +/-    2.29  0.050 / 0.080