PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-06:28:00
G10     250.7          26.5                6.0 +/-    1.70      11.4 +/-    1.70  0.040 / 0.040
G13     53.7           30.2                6.0 +/-    2.09      10.4 +/-    2.09  0.040 / 0.040
G15     85.0           57.0                6.9 +/-    0.73       8.0 +/-    0.73  0.080 / 0.310
G16     295.2          15.5                2.7 +/-    1.72       6.6 +/-    1.72  0.090 / 0.300
G20     340.5          72.0                5.9 +/-    0.24       6.2 +/-    0.24  0.040 / 0.040
G21     334.0          60.4                4.3 +/-    0.65       4.8 +/-    0.65  0.040 / 0.040
G26     266.5          15.6                5.9 +/-    1.28      14.4 +/-    1.28  0.040 / 0.050
G29     165.0          49.9                6.5 +/-    0.49       8.2 +/-    0.49  0.030 / 0.050