PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-20:12:30
G10     250.4          26.8               10.9 +/-    1.45      20.4 +/-    1.45  0.040 / 0.060
G13     53.6           29.8                6.8 +/-    0.69      12.0 +/-    0.69  0.040 / 0.060
G15     96.3           60.1                9.5 +/-    0.65      10.7 +/-    0.65  0.120 / 0.560
G16     295.3          15.7                7.2 +/-    3.01      17.6 +/-    3.01  0.120 / 0.620
G20     269.4          50.6                6.9 +/-    0.76       8.6 +/-    0.76  0.060 / 0.170
G21     333.8          60.1                8.1 +/-    0.68       9.1 +/-    0.68  0.070 / 0.180
G26     267.9          15.6                8.9 +/-    1.49      21.9 +/-    1.49  0.030 / 0.050
G29     164.7          50.8                9.3 +/-    1.45      11.6 +/-    1.45  0.040 / 0.040