PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-22:13:10
G02     60.1           33.6                7.6 +/-    1.15      12.3 +/-    1.15  0.090 / 0.270
G05     57.5           62.4                9.3 +/-    0.95      10.3 +/-    0.95  0.080 / 0.300
G12     183.8          28.6               12.3 +/-    1.63      22.2 +/-    1.63  0.060 / 0.130
G13     127.6          17.0               12.8 +/-    0.96      30.3 +/-    0.96  0.040 / 0.120
G15     164.1          12.9               14.9 +/-    2.63      38.8 +/-    2.63  0.070 / 0.080
G20     208.2          64.7               13.8 +/-    0.80      15.1 +/-    0.80  0.060 / 0.080
G21     273.1          19.0               10.4 +/-    2.17      23.6 +/-    2.17  0.040 / 0.060
G25     225.1          48.3               12.0 +/-    1.67      15.4 +/-    1.67  0.030 / 0.050
G29     331.5          59.1                8.4 +/-    0.70       9.6 +/-    0.70  0.030 / 0.050