PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-06:27:50
G01     301.6          36.4                6.5 +/-    1.82      10.1 +/-    1.82  0.040 / 0.020
G10     111.1          37.2                5.6 +/-    0.47       8.5 +/-    0.47  0.040 / 0.030
G11     272.8          29.5                5.9 +/-    1.27      10.5 +/-    1.27  0.080 / 0.090
G14     11.8           63.2                5.1 +/-    0.60       5.7 +/-    0.60  0.090 / 0.080
G18     120.1          12.1                4.0 +/-    1.98      10.7 +/-    1.98  0.050 / 0.050
G22     311.6          31.4                4.9 +/-    2.18       8.4 +/-    2.18  0.070 / 0.060
G25     72.2           16.9                4.7 +/-    1.42      11.2 +/-    1.42  0.090 / 0.090
G31     159.5          71.0                7.3 +/-    0.52       7.7 +/-    0.52  0.050 / 0.090
G32     41.1           49.2                4.6 +/-    1.23       5.8 +/-    1.23  0.070 / 0.110