PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-03:42:40
G01     317.7          20.6                7.7 +/-    2.64      16.8 +/-    2.64  0.240 / 0.280
G08     253.1          11.6                9.1 +/-    3.12      24.7 +/-    3.12  0.290 / 0.240
G10     83.4           52.5                6.4 +/-    0.88       7.9 +/-    0.88  0.020 / 0.020
G11     298.6          26.2                6.9 +/-    2.08      13.0 +/-    2.08  0.030 / 0.020
G14     312.2          71.6                6.8 +/-    0.70       7.1 +/-    0.70  0.310 / 0.230
G18     103.8          28.0                6.5 +/-    1.39      11.8 +/-    1.39  0.140 / 0.210
G22     301.9          12.9                7.7 +/-    1.95      20.1 +/-    1.95  0.180 / 0.360
G25     94.5           9.7               -10.3 +/-   31.58     -29.0 +/-   31.58  0.190 / 0.320
G31     176.1          44.6                8.2 +/-    0.72      11.1 +/-    0.72  0.040 / 0.040
G32     9.2            66.3                6.3 +/-    0.48       6.8 +/-    0.48  0.040 / 0.040