0620059

(Abridged) This proposal is a continuation of the on-going (AO4--AO5) program of making a several Msec-long series of multiple latitude scans of selected regions of the Galactic disk. Even although our AO4 and AO5 accepted proposals are not yet completed our analysis of first 4 Msec of already performed observations showed that this technique of studying the extended/diffuse high-energy emission of the Galaxy is very successful in minimizing systematic errors associated with the SPI and ISGRI detectors background variations and thus providing a clean emission spectrum of the Galactic disk limited only by the photon counting statistics. In this proposal we selected three regions in the Galaxy for dissections -- l~4022.5 -30 -- which will be complimentary to the already performed observations of the inner Galaxy [truncated! Please see actual data for full text]