PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-18:57:30
G02     316.2          80.2               10.2 +/-    0.61      10.3 +/-    0.61  0.030 / 0.030
G05     168.9          28.8               13.2 +/-    1.95      23.7 +/-    1.95  0.030 / 0.030
G06     41.5           41.9                8.2 +/-    1.21      11.6 +/-    1.21  0.170 / 0.270
G12     313.5          70.3                7.9 +/-    0.66       8.4 +/-    0.66  0.300 / 0.220
G17     86.2           10.0                9.2 +/-    0.95      25.6 +/-    0.95  0.030 / 0.040
G19     74.9           26.6                9.1 +/-    1.89      17.2 +/-    1.89  0.030 / 0.030
G24     231.4          24.5                9.8 +/-    2.44      19.4 +/-    2.44  0.090 / 0.150
G25     317.1          31.9                9.8 +/-    1.61      16.6 +/-    1.61  0.110 / 0.130