PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/26-20:27:50
G02     61.1           32.3               14.8 +/-    1.11      24.7 +/-    1.11  0.070 / 0.110
G05     58.6           64.0               16.4 +/-    0.31      18.1 +/-    0.31  0.050 / 0.110
G12     184.4          29.2               20.0 +/-    1.30      35.7 +/-    1.30  0.040 / 0.070
G13     127.7          17.0               19.4 +/-    2.48      45.8 +/-    2.48  0.040 / 0.080
G15     163.1          13.6               22.9 +/-    1.51      58.8 +/-    1.51  0.130 / 0.270
G20     208.7          64.3               20.7 +/-    1.25      22.7 +/-    1.25  0.100 / 0.330
G21     273.5          19.6               15.4 +/-    2.18      34.3 +/-    2.18  0.030 / 0.040
G25     226.4          48.5               19.1 +/-    2.20      24.5 +/-    2.20  0.040 / 0.040
G29     332.8          60.2               16.4 +/-    0.87      18.6 +/-    0.87  0.040 / 0.040