PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-22:27:30
G02     52.9           39.7                8.3 +/-   21.02      12.2 +/-   21.02  0.040 / 0.060
G05     73.2           68.2                8.9 +/-    0.61       9.5 +/-    0.61  0.030 / 0.060
G12     185.2          37.2               14.9 +/-    2.23      22.7 +/-    2.23  0.030 / 0.030
G13     133.8          11.4               14.0 +/-   12.36      37.8 +/-   12.36  0.030 / 0.040
G20     203.9          55.5               13.9 +/-    0.48      16.5 +/-    0.48  0.030 / 0.070
G21     266.5          13.8               12.3 +/-    2.03      31.6 +/-    2.03  0.030 / 0.050
G25     237.2          54.9               12.9 +/-    1.02      15.4 +/-    1.02  0.070 / 0.120
G29     325.7          50.9               11.4 +/-    1.56      14.2 +/-    1.56  0.040 / 0.100