
TY  - JOUR
A1  - Bracewell, RN 
A1  - Roberts, JA 
T1  - Aerial Smoothing in Radio Astronomy
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1954
VL  - 7
IS  - 4
SP  - 615
EP  - 640
KW  - 
UR  - https://doi.org/10.1071/PH540615 
N2  - When an aerial is used to survey the distribution of radio brightness over the sky, the observed distribution is smoother than the true distribution; the broader the beam of the aerial, the greater the smoothing. It is shown that the aerial does not register those spatial Fourier components of the true distribution having frequencies beyond a cut-off determined by the aerial aperture. Components of lower frequency are registered but their relative strengths are altered. 
ER  -

