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Your colleague proposes putting a W-band radar (100 GHz) with a 30 dB gain on a CubeSat to look at satellites with a 1

Your colleague proposes putting a W-band radar (100 GHz) with a 30 dB gain on a CubeSat to look at satellites

Your colleague proposes putting a W-band radar (100 GHz) with a 30 dB gain on a CubeSat to look at satellites with a 1 square meter RCS at a range of 100 km. 0.1 mW of power is required to have a sufficient SNR to detect the satellites. Assume space is a lossless environment. How much peak (Pt) power will be required to do this? Is this proposal realistic? Why or why not?

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