PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-18:12:20
G02     204.1          29.3               17.6 +/-    1.70      31.4 +/-    1.70  0.060 / 0.090
G06     160.0          68.2               14.9 +/-    1.00      16.0 +/-    1.00  0.050 / 0.100
G12     307.7          15.8               11.5 +/-    1.55      28.0 +/-    1.55  0.090 / 0.130
G17     37.7           47.9               13.4 +/-    1.00      17.4 +/-    1.00  0.100 / 0.120
G19     4.6            64.9               13.1 +/-    0.37      14.3 +/-    0.37  0.040 / 0.060
G24     301.0          36.4               13.2 +/-    1.42      20.5 +/-    1.42  0.040 / 0.060
G28     101.8          31.8               14.0 +/-    0.91      23.6 +/-    0.91  0.130 / 0.470