PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-17:43:10
G02     248.6          76.4               15.0 +/-    0.55      15.3 +/-    0.55  0.030 / 0.040
G05     174.1          16.1               17.1 +/-    2.49      41.4 +/-    2.49  0.030 / 0.040
G06     40.2           54.9               14.0 +/-    0.62      16.7 +/-    0.62  0.110 / 0.170
G12     321.5          56.3               14.2 +/-    0.69      16.7 +/-    0.69  0.180 / 0.280
G17     75.7           17.7               12.7 +/-    1.68      29.6 +/-    1.68  0.150 / 0.240
G19     62.7           34.6               13.7 +/-    2.30      21.9 +/-    2.30  0.190 / 0.280
G24     243.3          33.0               16.9 +/-    2.51      27.9 +/-    2.51  0.080 / 0.160
G25     317.4          19.5               11.1 +/-    2.12      24.8 +/-    2.12  0.100 / 0.150