PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-22:12:50
G02     58.2           35.2                9.2 +/-    1.00      14.5 +/-    1.00  0.040 / 0.140
G05     60.9           64.3               11.6 +/-    0.29      12.8 +/-    0.29  0.060 / 0.120
G12     184.2          30.9               16.4 +/-    1.33      28.1 +/-    1.33  0.040 / 0.050
G13     129.3          15.5               14.7 +/-    2.59      36.2 +/-    2.59  0.030 / 0.040
G15     165.3          11.1               12.1 +/-   31.94      32.8 +/-   31.94  0.110 / 0.440
G20     206.9          62.2               16.9 +/-    0.66      18.9 +/-    0.66  0.130 / 0.390
G21     271.3          17.6               13.0 +/-    2.19      30.4 +/-    2.19  0.040 / 0.060
G25     227.9          50.2               15.8 +/-    1.57      19.9 +/-    1.57  0.040 / 0.070
G29     329.9          56.8               11.7 +/-    0.62      13.7 +/-    0.62  0.030 / 0.040