PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-16:57:50
G02     72.0           22.4                8.4 +/-    0.83      17.5 +/-    0.83  0.040 / 0.050
G05     46.8           49.8                9.0 +/-    1.05      11.4 +/-    1.05  0.040 / 0.040
G12     182.7          18.2               10.9 +/-    4.16      25.1 +/-    4.16  0.080 / 0.250
G13     117.1          25.1               11.8 +/-    1.16      23.1 +/-    1.16  0.110 / 0.260
G15     154.8          24.6               13.8 +/-    1.03      27.2 +/-    1.03  0.020 / 0.050
G18     223.0          14.7               11.4 +/-    3.46      28.6 +/-    3.46  0.030 / 0.050
G20     222.7          75.9               12.0 +/-    0.92      12.4 +/-    0.92  0.060 / 0.200
G25     217.8          38.8               13.0 +/-    1.83      19.2 +/-    1.83  0.060 / 0.220
G29     350.8          75.0               10.1 +/-    0.75      10.4 +/-    0.75  0.070 / 0.110