PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-21:42:50
G02     38.7           51.3               11.7 +/-    0.60      14.5 +/-    0.60  0.040 / 0.060
G05     125.9          68.4               13.8 +/-    0.42      14.7 +/-    0.42  0.050 / 0.060
G12     189.8          55.5               14.9 +/-    1.67      17.6 +/-    1.67  0.020 / 0.040
G20     199.1          37.8               17.3 +/-    1.56      26.1 +/-    1.56  0.030 / 0.040
G25     270.9          60.5               14.8 +/-    1.10      16.7 +/-    1.10  0.060 / 0.080
G29     314.8          36.9               12.9 +/-    0.96      19.7 +/-    0.96  0.030 / 0.070