heat signature

In some of them the propeller is situated behind the exhaust source to disperse hot air, reducing the heat signature.

一些型号的无人机的螺旋桨装在排气口的后面，这样可以搅散热空气，降低可被导弹追踪的热信号。

The heat signature shows a rough estimate of temperature, with yellow being hottest and red coolest.

这一温度标识显示了大致的估测温度，黄色表示最热，红色表示最冷。

An SA-7 is a relatively small weapon and works by homing in on the heat signature from an aircraft's engine .

是通过追踪航空器发动机热量寻的的相对小型的武器。