PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-23:27:30
G08     308.5          19.7               13.3 +/-    2.75      29.5 +/-    2.75  0.040 / 0.060
G10     329.7          59.5               12.3 +/-    0.31      14.0 +/-    0.31  0.040 / 0.050
G14     218.0          32.1               15.1 +/-    0.98      25.3 +/-    0.98  0.060 / 0.090
G15     46.7           11.4               10.5 +/-    1.69      28.5 +/-    1.69  0.060 / 0.080
G18     38.0           59.6               13.7 +/-    0.29      15.6 +/-    0.29  0.030 / 0.060
G21     133.7          55.8               15.2 +/-    0.52      18.0 +/-    0.52  0.030 / 0.060
G24     75.9           30.6               13.9 +/-    0.64      24.0 +/-    0.64  0.050 / 0.080
G27     273.3          37.6               14.8 +/-    1.10      22.4 +/-    1.10  0.050 / 0.110
G32     223.3          49.0               15.6 +/-    0.83      19.9 +/-    0.83  0.030 / 0.040