PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-19:43:10
G02     254.0          76.6                8.3 +/-    0.31       8.5 +/-    0.31  0.030 / 0.030
G05     172.0          19.5               14.1 +/-    1.89      31.5 +/-    1.89  0.030 / 0.030
G06     40.3           51.7                8.6 +/-    0.56      10.6 +/-    0.56  0.040 / 0.040
G12     321.1          60.0                8.0 +/-    0.85       9.1 +/-    0.85  0.040 / 0.040
G17     77.7           16.3                8.9 +/-    1.54      21.5 +/-    1.54  0.190 / 0.200
G19     65.1           33.0                7.0 +/-    1.06      11.5 +/-    1.06  0.140 / 0.170
G25     317.6          22.2                9.3 +/-    2.25      19.4 +/-    2.25  0.090 / 0.150