PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-03:12:50
G08     318.2          13.4                9.9 +/-    1.82      25.5 +/-    1.82  0.050 / 0.050
G10     307.1          54.4                8.7 +/-    1.70      10.4 +/-    1.70  0.050 / 0.050
G14     212.2          20.2               13.5 +/-    3.76      29.6 +/-    3.76  0.100 / 0.260
G15     45.7           24.8               10.2 +/-    3.11      20.0 +/-    3.11  0.100 / 0.240
G18     9.6            64.9                9.4 +/-    1.28      10.2 +/-    1.28  0.030 / 0.050
G20     77.1           12.0               10.4 +/-    3.02      27.8 +/-    3.02  0.040 / 0.060
G21     114.5          69.2               11.5 +/-    1.24      12.2 +/-    1.24  0.060 / 0.090
G24     91.0           28.9               11.2 +/-    1.35      20.1 +/-    1.35  0.070 / 0.080
G27     290.1          37.3               11.0 +/-    1.96      16.7 +/-    1.96  0.060 / 0.080
G32     214.4          38.7               12.6 +/-    1.24      18.8 +/-    1.24  0.050 / 0.090