PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-09:27:30
G03     236.0          66.1                4.9 +/-    0.64       5.3 +/-    0.64  0.180 / 0.120
G07     250.9          12.2                3.0 +/-    7.41       7.8 +/-    7.41  0.120 / 0.130
G09     306.3          22.9                4.6 +/-    2.62       9.4 +/-    2.62  0.200 / 0.250
G14     103.4          10.4                2.3 +/-    3.36       6.2 +/-    3.36  0.220 / 0.250
G16     121.3          61.8                5.1 +/-    0.39       5.7 +/-    0.39  0.050 / 0.060
G22     190.9          51.2                4.4 +/-    0.53       5.5 +/-    0.53  0.050 / 0.060
G23     321.1          50.8                2.8 +/-    1.05       3.6 +/-    1.05  0.060 / 0.040
G26     65.2           50.8                3.2 +/-    1.16       4.0 +/-    1.16  0.040 / 0.050
G31     53.9           17.0                1.8 +/-    3.16       4.2 +/-    3.16  0.150 / 0.460