PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-20:43:10
G05     46.5           26.0               10.1 +/-    1.95      19.3 +/-    1.95  0.160 / 0.400
G13     85.4           37.3               15.2 +/-    0.98      23.1 +/-    0.98  0.150 / 0.350
G15     132.9          47.9               16.7 +/-    0.71      21.6 +/-    0.71  0.090 / 0.220
G18     240.3          37.5               14.9 +/-    1.60      22.7 +/-    1.60  0.080 / 0.250
G20     22.6           71.7               12.8 +/-    0.38      13.5 +/-    0.38  0.150 / 0.090
G21     308.3          44.3               12.3 +/-    0.82      16.7 +/-    0.82  0.110 / 0.180
G25     199.8          13.5               16.8 +/-    1.81      43.2 +/-    1.81  0.030 / 0.020
G26     296.7          19.2               12.4 +/-    1.03      28.0 +/-    1.03  0.030 / 0.020
G29     147.4          74.6               15.0 +/-    1.00      15.5 +/-    1.00  0.050 / 0.030