PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-18:42:50
G02     63.7           29.6               12.2 +/-    0.73      21.6 +/-    0.73  0.080 / 0.330
G05     54.5           60.8               12.9 +/-    0.76      14.6 +/-    0.76  0.080 / 0.300
G12     184.4          27.2               15.4 +/-    2.07      28.6 +/-    2.07  0.110 / 0.120
G13     125.7          18.7               15.0 +/-    1.87      34.1 +/-    1.87  0.110 / 0.120
G15     161.0          16.0               18.1 +/-    2.08      43.8 +/-    2.08  0.050 / 0.080
G20     210.9          66.3               17.0 +/-    1.09      18.4 +/-    1.09  0.050 / 0.070
G21     275.9          21.8               11.1 +/-    2.03      23.4 +/-    2.03  0.030 / 0.040
G25     225.4          46.9               14.6 +/-    1.82      19.1 +/-    1.82  0.040 / 0.050
G29     336.2          63.8               12.7 +/-    1.13      14.0 +/-    1.13  0.120 / 0.410