It’s nice to see some hard data, but it makes things almost certain that the Seeker is improperly implemented, based on these numbers.
The “Self Homing Head Sensitivity” assmed to be noise equivalent temperature difference (NE∆T) of 270 Milli-Kelvin (mK) is ridiculously high for a “third generation” system, let alone requiring a 4 kelvin difference to provide sufficient contrast for a track to be maintained, needing “16 units” of contrast Is not great, especially for a brochure means that they’re not using a Histogram or other contrast stretching techniques to improve performance the same way the IIR/ CCD Maverick or many other Electro-Optical systems do.
claims that NE∆T values of 25~35 mK can be expected of an Cooled InSb Focal plane Array (AMBER Radiance I)
In short surfaces that are within a a quarter of a degree of one another have the same return(and depending on what is actually displayed it may be far worse), which is a magnitude worse than commercial gear from the late 90’s.
Sure with limits as above you will assuredly get passable contrast within a scene, but in no way shape or form will you retain details, and everything will be blown out and blobby.
Those are the same missiles, just like R-73 and R-73E.
German MiG is carrying missiles it shouldn’t have just because it can fit them both, since they’re the same thing.