The Indian Stratosphere-Troposphere (ST) Radar taken under consideration is provisioned with handling the average to peak transmitted power (Pav/Pt) value up to 15.6 × 10-6. Baud length of 6μs corresponds to a range resolution of 900 meters for a 13-bit Barker code in traveling longest range. In this paper, we propose to use a compound Barker code in traveling the same range but with an improved range resolution of 37.5 meters. Compound Barker codes are generated to get this improved range resolution, for the baud length of 0.25 μs. The basic operation of the proposed solution is to utilize the highest value of Pav/Pt, which results in the generation of compound Barker code of suitable length to travel the longest distance.