PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-20:42:40
G03     290.3          67.0                8.5 +/-    0.40       9.2 +/-    0.40  0.030 / 0.040
G09     295.4          12.3                9.4 +/-    3.89      24.8 +/-    3.89  0.040 / 0.040
G14     84.2           27.6                9.1 +/-    1.47      16.8 +/-    1.47  0.100 / 0.180
G16     144.0          45.0               11.3 +/-    1.59      15.2 +/-    1.59  0.090 / 0.230
G22     219.6          70.4                9.2 +/-    0.48       9.7 +/-    0.48  0.040 / 0.070
G23     307.0          36.9                8.6 +/-    1.01      13.1 +/-    1.01  0.040 / 0.080
G26     98.3           54.2                9.0 +/-    0.71      10.8 +/-    0.71  0.030 / 0.040
G31     45.3           32.9                7.4 +/-    1.38      12.2 +/-    1.38  0.030 / 0.030