PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-22:43:10
G02     58.9           34.8                9.2 +/-    1.17      14.6 +/-    1.17  0.040 / 0.070
G05     58.9           63.0                9.9 +/-    0.89      11.0 +/-    0.89  0.040 / 0.070
G12     183.9          29.6               14.5 +/-    1.19      25.5 +/-    1.19  0.030 / 0.040
G13     128.4          16.2               15.5 +/-    1.23      37.4 +/-    1.23  0.030 / 0.040
G15     165.0          11.8               14.3 +/-    3.50      38.4 +/-    3.50  0.030 / 0.040
G20     207.4          63.5               16.2 +/-    0.62      17.9 +/-    0.62  0.030 / 0.050
G21     272.0          18.1               11.2 +/-    1.82      25.9 +/-    1.82  0.050 / 0.130
G25     227.2          49.5               14.4 +/-    0.76      18.2 +/-    0.76  0.040 / 0.110
G29     330.4          57.6               12.3 +/-    0.56      14.3 +/-    0.56  0.040 / 0.060