PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-18:28:10
G02     254.0          77.2                9.6 +/-    0.50       9.8 +/-    0.50  0.030 / 0.070
G05     173.0          18.2               11.7 +/-    1.61      27.0 +/-    1.61  0.030 / 0.030
G06     40.2           52.8                8.2 +/-    0.80      10.0 +/-    0.80  0.130 / 0.280
G12     321.2          58.6                9.1 +/-    0.74      10.4 +/-    0.74  0.140 / 0.210
G17     77.2           16.6                7.8 +/-    2.08      18.7 +/-    2.08  0.080 / 0.120
G19     64.5           33.4                7.1 +/-    2.09      11.6 +/-    2.09  0.120 / 0.140
G24     241.5          31.9               10.0 +/-    1.12      16.8 +/-    1.12  0.040 / 0.040
G25     317.6          21.6               10.8 +/-    1.58      22.8 +/-    1.58  0.030 / 0.040