presently available design, the SKA1-low has a compact core of radius 350 m with closely packed 40 super-stations distributed in four concentric rings, while six closely packed antenna form a super-station. Rest of the 54 super-stations are distributed in a three-arm spiral from 350 m to 35 km radius, where the super-station density distribution follow a logarithmic relation[^10]. The total number of antenna for the SKA1-low is $N_{\rm ant}$ = 564. Table \[tab1\] shows the parameters related to the model-observation used in this study. The left-hand panel of Figure \[image\_ska\_base\_alter\] shows the baseline $uv$ coverage for 4 h of observation towards a region with declination $\delta_{\rm dec}=-30^{\circ}$ with the SKA1-low . The right-hand panel of Figure \[image\_ska\_base\_alter\] shows the circularly averaged baseline distribution of the SKA1-low at frequency 90 MHz. The quantity plotted $n_{\rm B}(U,\nu)$ denotes the number density of antenna pairs having baseline $U$ at frequency $\nu$, and is normalized such that $\int n_{\rm B}(U,\nu) ~d^2U = N_{\rm ant}\times (N_{\rm ant}-1)/2$ is the total number of baselines for the SKA1-low. One can easily notice that the baseline distribution is more concentrated at low baseline regions. Note that we have not actually used this circularly averaged baseline distribution in this 