PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/21-15:12:40
G10     255.6          32.5                8.8 +/-    3.57      14.6 +/-    3.57  0.210 / 0.550
G13     48.4           25.3                8.7 +/-    4.11      16.8 +/-    4.11  0.220 / 0.520
G15     72.0           53.8                5.7 +/-    1.12       6.9 +/-    1.12  0.040 / 0.060
G16     289.5          15.5                6.1 +/-    2.35      14.9 +/-    2.35  0.050 / 0.050
G20     281.2          56.5               10.4 +/-    3.46      12.2 +/-    3.46  0.050 / 0.040
G21     342.6          64.0                8.7 +/-    1.41       9.6 +/-    1.41  0.040 / 0.040
G26     263.5          13.2                6.6 +/-    2.71      17.1 +/-    2.71  0.090 / 0.090
G29     165.3          45.2               10.5 +/-    1.44      14.1 +/-    1.44  0.110 / 0.120