PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-14:42:40
G02     20.0           66.1                5.9 +/-    0.60       6.4 +/-    0.60  0.120 / 0.440
G05     158.5          48.0               10.4 +/-    0.95      13.5 +/-    0.95  0.110 / 0.530
G06     46.7           28.7                3.3 +/-    0.52       5.9 +/-    0.52  0.030 / 0.030
G12     247.0          78.9                6.7 +/-    0.92       6.8 +/-    0.92  0.020 / 0.030
G19     90.1           16.4                9.4 +/-    1.22      22.7 +/-    1.22  0.030 / 0.050
G20     198.0          13.1                7.4 +/-    2.64      19.3 +/-    2.64  0.030 / 0.050
G24     218.4          12.2                6.9 +/-    1.93      18.2 +/-    1.93  0.090 / 0.370
G25     310.3          45.0                6.2 +/-    2.36       8.4 +/-    2.36  0.090 / 0.390
G29     300.4          23.5                6.9 +/-    1.44      14.0 +/-    1.44  0.040 / 0.090