Sisir Radar, a space tech startup specializing in Synthetic Aperture Radar (SAR), has secured $1.5 million in seed funding, led by Shastra VC, with additional participation from Riverwalk Holdings and INVSTT.

The funds will be used to enhance Sisir Radar’s R&D and manufacturing capabilities, positioning the company to launch the highest-resolution L-band SAR satellite by the end of 2026.

Founded by Dr. Tapan Misra, Sisir Radar develops SAR technology for defense, intelligence, and commercial applications. The company claims to be the first Indian firm to create SAR imaging payloads across multiple bands, including L, P, and X bands.

Sisir’s SAR technology allows for 24/7 real-time Earth monitoring, capable of seeing through darkness, clouds, and dense foliage, with critical applications in defense, agriculture, mining, disaster response, maritime surveillance, and infrastructure monitoring.

In addition to being a technology partner for major defense companies in India, Sisir has won two IDEX challenges to develop submetric L-band and high-resolution P-band SAR satellites for the Indian Air Force.