Exhaust from a Diesel has much brighter IR signature as it’s exhaust particles are black bodies that radiates and scatter IR very effectively. As turbine genera

Exhaust from a Diesel has much brighter IR signature as it’s exhaust particles are black bodies that radiates and scatter IR very effectively. As turbine generate much cleaner exhaust of molecules that does not radiate much in IR on their own, it’s IR signature is lower despite higher temperature and more exhaust mass. This is a rare example when pollution is bad both for environment and military applications. I do not have references. I learned it from a buddy whom I trust.