PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-16:58:00
G01     266.1          40.1               10.3 +/-    1.21      15.0 +/-    1.21  0.080 / 0.050
G03     316.6          35.9                9.0 +/-    1.03      14.1 +/-    1.03  0.080 / 0.050
G10     131.8          14.4               11.1 +/-    2.94      27.9 +/-    2.94  0.160 / 0.200
G11     250.2          18.8                9.7 +/-    1.58      22.0 +/-    1.58  0.260 / 0.230
G14     45.8           49.2                8.4 +/-    0.65      10.7 +/-    0.65  0.030 / 0.030
G22     313.2          56.8                8.3 +/-    1.72       9.7 +/-    1.72  0.020 / 0.030
G25     49.7           16.0                8.1 +/-    4.58      19.5 +/-    4.58  0.050 / 0.060
G26     145.0          28.3               11.4 +/-    0.98      20.7 +/-    0.98  0.050 / 0.060
G31     48.6           69.8                9.3 +/-    0.39       9.9 +/-    0.39  0.070 / 0.090
G32     67.7           29.6                8.9 +/-    1.15      15.7 +/-    1.15  0.060 / 0.090