PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-02:42:50
G08     292.7          23.5                6.7 +/-    0.83      13.5 +/-    0.83  0.050 / 0.040
G10     2.6            63.0                6.3 +/-    0.65       6.9 +/-    0.65  0.050 / 0.040
G14     229.4          47.3               11.0 +/-    1.52      14.4 +/-    1.52  0.060 / 0.100
G18     60.6           52.7                7.9 +/-    0.68       9.6 +/-    0.68  0.060 / 0.100
G24     58.4           27.1                5.6 +/-    0.62      10.4 +/-    0.62  0.080 / 0.120
G27     253.7          31.9                9.9 +/-    2.33      16.6 +/-    2.33  0.070 / 0.090
G32     243.3          65.4               10.4 +/-    0.64      11.3 +/-    0.64  0.060 / 0.080