PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-01:58:10
G08     299.8          22.6                7.8 +/-    0.62      16.2 +/-    0.62  0.040 / 0.070
G10     347.6          61.9                8.3 +/-    0.59       9.3 +/-    0.59  0.060 / 0.080
G14     223.8          40.9               12.6 +/-    2.44      18.0 +/-    2.44  0.060 / 0.060
G18     50.9           56.1                8.3 +/-    1.05       9.7 +/-    1.05  0.060 / 0.050
G21     141.2          47.9               10.9 +/-    0.39      14.1 +/-    0.39  0.030 / 0.050
G24     65.5           29.4                8.7 +/-    1.57      15.5 +/-    1.57  0.040 / 0.070
G27     261.7          35.1               12.2 +/-    1.90      19.3 +/-    1.90  0.060 / 0.100
G32     232.7          59.0               10.4 +/-    1.93      11.9 +/-    1.93  0.080 / 0.100