PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-02:27:50
G10     279.1          43.9               11.6 +/-    0.91      15.9 +/-    0.91  0.050 / 0.060
G13     38.5           10.9               12.9 +/-    3.67      35.3 +/-    3.67  0.040 / 0.060
G15     51.8           42.7               12.2 +/-    1.02      17.0 +/-    1.02  0.080 / 0.240
G18     322.0          66.2               10.8 +/-    1.12      11.7 +/-    1.12  0.070 / 0.300
G20     62.8           25.4               12.3 +/-    1.06      23.8 +/-    1.06  0.040 / 0.040
G21     38.7           77.0               13.3 +/-    0.49      13.6 +/-    0.49  0.040 / 0.040
G24     112.0          20.1               12.8 +/-    2.08      28.2 +/-    2.08  0.140 / 0.320
G27     311.0          28.1               11.3 +/-    2.31      20.7 +/-    2.31  0.130 / 0.280
G29     168.1          18.5               14.1 +/-    1.16      32.2 +/-    1.16  0.070 / 0.120
G32     206.7          18.9               12.2 +/-    2.35      27.7 +/-    2.35  0.090 / 0.120