PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-15:12:30
G02     261.0          79.5                8.8 +/-    0.61       8.9 +/-    0.61  0.100 / 0.240
G05     172.5          18.7               12.8 +/-    2.22      29.1 +/-    2.22  0.210 / 0.240
G06     39.7           54.3                7.5 +/-    0.76       9.0 +/-    0.76  0.080 / 0.160
G12     320.9          57.3                9.4 +/-    0.68      10.9 +/-    0.68  0.090 / 0.090
G17     77.2           16.8                9.9 +/-    1.30      23.6 +/-    1.30  0.030 / 0.040
G19     64.4           33.5                9.5 +/-    1.52      15.5 +/-    1.52  0.040 / 0.040
G24     241.3          31.8                8.6 +/-    1.17      14.5 +/-    1.17  0.110 / 0.120
G25     317.6          19.7                7.0 +/-    1.26      15.4 +/-    1.26  0.090 / 0.130