ehabasadek,
I think the term you are referring to is actually "
Autonomous Integrity Monitoring Extrapolation" not Aircraft. Its more commonly known as AIME. Its common fit on a lot of the Airbus fleet these days (as well as some CRJ's) and its not simply RAIM as described above.
AIME is a patented technique for the integration of GPS and Inertial guidance to produce a robust position solution with high availability even in situations in which the GPS guidance is lost (for example in an area in which GPS is jammed or in those rare cases where there are not enough satellites to generate a position solution). AIME is capable of providing RNP 0.3 accuracy guidance with an availability of 99.999% and forms the basis of the Airbus RNP certification. Its seriously impressive nav technology imho, and I'm not a salesman :-)
AIME was developed my Litton Aero Products now a part of Northrop Grumman, the URL is
http://www.ngnavsys.com/Navigation/# and look for the LTN-101 product. Theres plenty more info around on it if you are interested, e.g.
here .
Hope this helps a bit, (perhaps 411A could read the above and come back with any questions
)
Regards,
gnss