PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-19:57:50
G05     47.5           22.5               11.8 +/-    2.73      24.4 +/-    2.73  0.120 / 0.460
G13     81.0           37.5               14.9 +/-    0.64      22.6 +/-    0.64  0.260 / 0.510
G15     127.9          50.4               15.8 +/-    0.82      19.8 +/-    0.82  0.050 / 0.070
G18     243.2          40.4               17.7 +/-    1.62      25.6 +/-    1.62  0.060 / 0.070
G20     25.4           68.9               15.6 +/-    0.40      16.5 +/-    0.40  0.110 / 0.180
G21     311.7          46.7               14.9 +/-    0.95      19.6 +/-    0.95  0.090 / 0.170
G25     198.6          11.3               15.2 +/-    1.88      41.4 +/-    1.88  0.080 / 0.210
G26     294.1          19.1               13.2 +/-    1.38      29.6 +/-    1.38  0.130 / 0.210
G29     150.8          70.3               16.2 +/-    0.47      17.1 +/-    0.47  0.050 / 0.040