PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-14:28:10
G02     207.9          46.1               10.1 +/-    1.27      13.4 +/-    1.27  0.060 / 0.090
G06     127.7          79.0                7.8 +/-    0.56       7.9 +/-    0.56  0.050 / 0.070
G12     313.8          24.6                8.1 +/-    2.45      16.0 +/-    2.45  0.090 / 0.160
G17     48.9           38.5                5.6 +/-    0.54       8.3 +/-    0.54  0.070 / 0.150
G19     26.3           56.1                6.0 +/-    0.34       7.1 +/-    0.34  0.030 / 0.030
G24     285.2          41.3                6.1 +/-    1.78       8.8 +/-    1.78  0.030 / 0.030
G28     113.8          22.3                7.9 +/-    2.23      16.5 +/-    2.23  0.030 / 0.070