PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-14:43:00
G10     297.3          52.7                5.6 +/-    1.70       6.9 +/-    1.70  0.050 / 0.080
G15     45.7           25.6                4.7 +/-    1.42       9.1 +/-    1.42  0.050 / 0.080
G20     358.1          65.1                5.0 +/-    0.27       5.5 +/-    0.27  0.040 / 0.030
G21     93.4           73.8                6.9 +/-    0.38       7.2 +/-    0.38  0.040 / 0.040
G24     101.0          26.1                7.9 +/-    1.89      15.1 +/-    1.89  0.070 / 0.050
G27     302.2          34.0                4.3 +/-    2.18       7.0 +/-    2.18  0.050 / 0.070
G32     209.0          32.2                6.6 +/-    2.13      11.1 +/-    2.13  0.140 / 0.170