PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-04:13:00
G01     317.8          20.8                6.5 +/-    2.13      14.1 +/-    2.13  0.190 / 0.220
G08     253.7          11.4                7.7 +/-    4.03      20.8 +/-    4.03  0.080 / 0.200
G10     85.2           51.0                5.9 +/-    1.02       7.3 +/-    1.02  0.280 / 0.250
G11     299.4          24.9                6.6 +/-    0.86      12.9 +/-    0.86  0.220 / 0.210
G14     302.8          70.3                4.5 +/-    0.75       4.7 +/-    0.75  0.070 / 0.180
G18     301.1          42.8                5.8 +/-    3.56       8.0 +/-    3.56  0.080 / 0.210
G20     99.1           47.8               18.3 +/-    1.19      23.7 +/-    1.19  0.040 / 0.050
G22     302.6          13.1                6.3 +/-    1.96      16.5 +/-    1.96  0.040 / 0.040
G31     172.8          47.9                6.6 +/-    0.82       8.6 +/-    0.82  0.260 / 0.360
G32     17.6           63.6                4.4 +/-    0.61       4.8 +/-    0.61  0.210 / 0.360