PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-00:28:00
G05     50.1           15.9                6.2 +/-    1.46      15.2 +/-    1.46  0.150 / 0.240
G10     239.4          15.0               12.1 +/-    2.14      30.1 +/-    2.14  0.110 / 0.210
G13     71.1           36.8                8.3 +/-    0.72      12.7 +/-    0.72  0.110 / 0.180
G15     121.0          54.7               11.3 +/-    0.74      13.5 +/-    0.74  0.140 / 0.240
G16     311.2          13.0                7.0 +/-    1.93      18.2 +/-    1.93  0.030 / 0.040
G18     249.7          44.4               11.0 +/-    1.08      15.0 +/-    1.08  0.030 / 0.040
G20     33.5           60.5                8.4 +/-    0.89       9.5 +/-    0.89  0.170 / 0.290
G21     317.1          50.1                7.8 +/-    1.00       9.9 +/-    1.00  0.090 / 0.400
G26     284.1          19.5                7.5 +/-    1.36      16.6 +/-    1.36  0.040 / 0.060
G29     158.4          64.8                8.7 +/-    0.82       9.5 +/-    0.82  0.050 / 0.090