PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-21:57:50
G10     292.6          50.3                9.8 +/-    1.23      12.3 +/-    1.23  0.060 / 0.100
G15     47.9           36.5                7.2 +/-    0.44      11.2 +/-    0.44  0.050 / 0.110
G20     343.9          65.4                7.9 +/-    0.89       8.6 +/-    0.89  0.070 / 0.150
G21     83.5           75.9                9.5 +/-    0.36       9.8 +/-    0.36  0.080 / 0.140
G24     98.6           24.9                9.7 +/-    1.76      19.0 +/-    1.76  0.050 / 0.050
G27     304.9          31.9                9.4 +/-    0.97      15.8 +/-    0.97  0.050 / 0.060
G29     168.5          11.2               12.3 +/-    3.75      33.6 +/-    3.75  0.040 / 0.080
G32     208.9          29.7               12.0 +/-    1.61      21.2 +/-    1.61  0.050 / 0.080