PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-22:27:40
G02     52.9           39.7               10.4 +/-    1.15      15.2 +/-    1.15  0.060 / 0.070
G05     73.2           68.2                9.6 +/-    0.43      10.2 +/-    0.43  0.060 / 0.070
G12     185.2          37.2               14.1 +/-    0.85      21.6 +/-    0.85  0.240 / 0.320
G13     133.8          11.4               15.1 +/-    7.11      40.8 +/-    7.11  0.100 / 0.310
G20     203.9          55.5               13.9 +/-    0.93      16.5 +/-    0.93  0.050 / 0.080
G21     266.5          13.8               10.9 +/-    2.14      28.1 +/-    2.14  0.050 / 0.080
G25     237.2          54.9               12.4 +/-    3.73      14.8 +/-    3.73  0.060 / 0.080
G29     325.7          50.9               11.2 +/-    0.40      14.0 +/-    0.40  0.050 / 0.060