PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/29-00:58:00
G02     295.6          81.9                7.8 +/-    0.62       7.9 +/-    0.62  0.030 / 0.040
G05     166.9          25.7               13.3 +/-    1.95      25.6 +/-    1.95  0.030 / 0.040
G06     40.1           48.6                7.1 +/-    0.37       9.1 +/-    0.37  0.060 / 0.130
G12     319.7          61.8                9.5 +/-    0.88      10.6 +/-    0.88  0.040 / 0.140
G17     77.1           20.1                8.1 +/-    0.93      17.7 +/-    0.93  0.110 / 0.280
G19     65.9           33.7                8.2 +/-    0.64      13.3 +/-    0.64  0.110 / 0.330
G24     235.9          28.9               11.8 +/-    1.76      21.1 +/-    1.76  0.070 / 0.150
G25     317.8          19.8                7.6 +/-    1.09      16.9 +/-    1.09  0.080 / 0.170