PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/11-13:12:40
G05     51.3           12.1                2.1 +/-    1.50       5.6 +/-    1.50  0.170 / 0.160
G10     241.3          20.3                5.1 +/-    1.50      11.2 +/-    1.50  0.220 / 0.240
G13     64.9           33.5                5.0 +/-    0.72       8.2 +/-    0.72  0.120 / 0.590
G15     103.6          55.9                7.0 +/-    0.43       8.2 +/-    0.43  0.120 / 0.530
G16     306.3          15.1                2.5 +/-    1.81       6.2 +/-    1.81  0.040 / 0.060
G20     258.0          46.0                6.1 +/-    1.15       8.0 +/-    1.15  0.050 / 0.080
G21     322.6          52.7                4.2 +/-    1.10       5.1 +/-    1.10  0.030 / 0.030
G26     280.2          18.8                3.5 +/-    1.72       7.8 +/-    1.72  0.040 / 0.030
G29     158.9          64.7                8.3 +/-    0.60       9.0 +/-    0.60  0.070 / 0.150