PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-01:57:50
G08     302.1          22.0                7.4 +/-    2.17      15.5 +/-    2.17  0.020 / 0.040
G10     342.9          61.4                9.9 +/-    0.46      11.2 +/-    0.46  0.030 / 0.030
G14     222.1          38.7               14.0 +/-    1.59      20.8 +/-    1.59  0.030 / 0.060
G18     47.4           57.2               10.2 +/-    1.30      11.9 +/-    1.30  0.030 / 0.070
G21     139.5          50.3               13.6 +/-    1.25      17.1 +/-    1.25  0.060 / 0.100
G24     68.1           29.9               11.9 +/-    0.73      21.0 +/-    0.73  0.050 / 0.090
G27     264.5          35.9               13.0 +/-    1.38      20.3 +/-    1.38  0.070 / 0.090
G32     230.0          56.9               12.7 +/-    0.66      14.8 +/-    0.66  0.060 / 0.080