Infrared Imaging Guidance is a homing method that using the image produced by different radiation of heat between target and background.

红外成像制导是利用目标和背景间的热辐射差，形成目标和周围景物的轮廓图像，来实现自动导引的一种制导方法。

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Previous research by German scientists in 1999 suggested that short wave radiation had an "undefined negative" impact on homing pigeons.

BBC: NEWS | UK | Phone masts 'confusing' pigeons

It also hopes to use BLYS as a homing device to deliver tiny doses of radiation directly to cancerous tumors that hit the B-cells, such as lymphoma.

FORBES: Magazine Article