PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-20:43:10
G02     31.5           56.7               10.2 +/-    0.66      11.9 +/-    0.66  0.030 / 0.050
G05     138.9          62.2               12.6 +/-    0.89      14.0 +/-    0.89  0.030 / 0.050
G06     54.3           14.2                8.5 +/-    2.26      21.4 +/-    2.26  0.030 / 0.040
G12     191.9          65.5               11.4 +/-    1.07      12.4 +/-    1.07  0.030 / 0.040
G19     99.1           12.1               10.4 +/-    1.95      27.6 +/-    1.95  0.040 / 0.060
G25     296.5          53.8               10.8 +/-    0.96      13.0 +/-    0.96  0.040 / 0.070
G29     306.7          26.8                8.9 +/-    1.54      16.7 +/-    1.54  0.040 / 0.060