PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-13:28:00
G10     261.7          36.7                5.9 +/-    1.85       9.2 +/-    1.85  0.120 / 0.250
G13     44.2           21.0                5.0 +/-    2.20      10.7 +/-    2.20  0.100 / 0.260
G15     62.1           49.2                4.4 +/-    0.79       5.6 +/-    0.79  0.130 / 0.280
G16     283.6          14.3                1.6 +/-    1.72       4.0 +/-    1.72  0.170 / 0.390
G20     293.2          60.3                5.0 +/-    0.89       5.7 +/-    0.89  0.040 / 0.040
G21     355.1          68.7                3.6 +/-    0.53       3.8 +/-    0.53  0.040 / 0.040
G24     126.6          10.8                5.9 +/-   12.84      16.2 +/-   12.84  0.050 / 0.070
G27     320.8          14.5                1.1 +/-    2.52       2.9 +/-    2.52  0.060 / 0.070
G29     166.5          38.3                6.3 +/-    1.19       9.5 +/-    1.19  0.100 / 0.060