PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-23:57:40
G08     320.2          11.6               -5.5 +/-   32.23     -14.8 +/-   32.23  0.070 / 0.090
G10     304.1          54.0                8.6 +/-    1.70      10.4 +/-    1.70  0.070 / 0.080
G14     211.6          14.8               12.2 +/-    2.12      30.4 +/-    2.12  0.030 / 0.050
G15     46.0           27.7                4.1 +/-    1.24       7.6 +/-    1.24  0.030 / 0.040
G20     297.2          47.3               20.1 +/-    0.36      26.3 +/-    0.36  0.040 / 0.050
G21     107.2          72.4                7.7 +/-    0.75       8.0 +/-    0.75  0.050 / 0.040
G24     90.8           27.7                8.5 +/-    0.78      15.7 +/-    0.78  0.070 / 0.120
G27     295.9          35.7                9.2 +/-    1.22      14.4 +/-    1.22  0.090 / 0.130
G32     212.2          38.1               10.3 +/-    1.43      15.5 +/-    1.43  0.250 / 0.770