In order to construct accurate point sources simulations at the frequencies relevant to 21-cm experiments , the angular correlation of radio sources must be taken into account .
This paper presents a measurement of angular two-point correlation function , w ( \theta ) , at 232 MHz from the MIYUN survey – tentative measurements of w ( \theta ) are also performed at 151 MHz .
It is found that double power law with shape w ( \theta ) = A \theta ^ { - \gamma } fits the 232 MHz data well .
For the angular lenght of 0.2 ^ { \circ } \mathrel { \hbox to 0.0 pt { \lower 3.0 pt \hbox { $ \mathchar 536 $ } \hss } % \raise 2.0 pt \hbox { $ \mathchar 316 $ } } \theta \mathrel { \hbox to 0.0 pt { \lower 3.0 pt% \hbox { $ \mathchar 536 $ } \hss } \raise 2.0 pt \hbox { $ \mathchar 316 $ } } 0.6 ^ { \circ } , \gamma \approx - 1.12 , and this value of slope is independent of the flux-density threshold ; while for angular lenghts much greater than 0.6 ^ { \circ } , \gamma has a shallower value of about - 0.16 .
By comparing the results of this paper with previous measurements of w ( \theta ) , it is discussed how w ( \theta ) changes with the change of frequency and completness limit .