PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-22:43:00
G10     254.5          30.0               15.5 +/-    2.42      27.2 +/-    2.42  0.050 / 0.060
G13     49.6           27.1                9.2 +/-    2.29      17.1 +/-    2.29  0.050 / 0.060
G15     82.9           58.5                9.3 +/-    0.76      10.7 +/-    0.76  0.160 / 0.540
G16     289.5          15.6                9.5 +/-    4.56      23.4 +/-    4.56  0.140 / 0.660
G20     258.0          23.3               15.7 +/-    1.49      32.0 +/-    1.49  0.080 / 0.190
G21     337.9          62.6                8.9 +/-    0.79       9.9 +/-    0.79  0.070 / 0.190
G26     262.1          13.8               13.6 +/-    1.54      34.7 +/-    1.54  0.030 / 0.040
G29     166.3          46.2               11.5 +/-    1.69      15.3 +/-    1.69  0.020 / 0.050