PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-01:57:30
G08     302.1          22.0                8.9 +/-    1.29      18.6 +/-    1.29  0.090 / 0.060
G10     342.9          61.4                9.3 +/-    0.49      10.4 +/-    0.49  0.060 / 0.050
G14     222.1          38.7               12.6 +/-    1.93      18.7 +/-    1.93  0.040 / 0.040
G18     47.4           57.2               11.6 +/-    0.50      13.5 +/-    0.50  0.040 / 0.050
G21     139.5          50.3               12.9 +/-    0.48      16.2 +/-    0.48  0.060 / 0.080
G24     68.1           29.9               10.8 +/-    1.27      19.0 +/-    1.27  0.050 / 0.070
G27     264.5          35.9               11.8 +/-    0.80      18.4 +/-    0.80  0.020 / 0.020
G32     230.0          56.9               11.4 +/-    2.22      13.4 +/-    2.22  0.030 / 0.020