PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-20:57:40
G10     255.2          30.6               13.4 +/-    1.92      23.3 +/-    1.92  0.100 / 0.100
G13     49.0           26.5               10.2 +/-    1.76      19.2 +/-    1.76  0.080 / 0.120
G15     85.3           59.8               11.5 +/-    0.61      13.1 +/-    0.61  0.050 / 0.050
G16     289.8          15.2               10.9 +/-    2.73      27.0 +/-    2.73  0.040 / 0.050
G20     277.2          54.1               13.0 +/-    0.83      15.6 +/-    0.83  0.070 / 0.180
G21     340.7          63.8               11.8 +/-    0.36      13.0 +/-    0.36  0.070 / 0.210
G26     262.7          13.4               12.4 +/-    0.90      32.1 +/-    0.90  0.040 / 0.060
G29     166.2          44.7               12.9 +/-    0.91      17.4 +/-    0.91  0.040 / 0.070