PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-21:42:50
G10     247.2          24.0               13.0 +/-    1.36      26.0 +/-    1.36  0.040 / 0.040
G13     57.3           31.8                9.9 +/-    1.49      16.6 +/-    1.49  0.050 / 0.040
G15     102.2          59.2               11.6 +/-    1.18      13.3 +/-    1.18  0.180 / 0.410
G16     298.0          16.2                7.8 +/-    1.47      18.9 +/-    1.47  0.120 / 0.370
G20     250.0          12.4               12.2 +/-    2.61      32.3 +/-    2.61  0.060 / 0.110
G21     327.5          56.5               10.2 +/-    0.59      12.0 +/-    0.59  0.080 / 0.120
G26     270.1          17.3               11.4 +/-    1.65      26.8 +/-    1.65  0.030 / 0.030
G29     164.0          56.0               12.3 +/-    0.65      14.5 +/-    0.65  0.030 / 0.040