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We have carried out the first general submillimeter analysis of the fieldtowards GRSMC 45.46+0.05, a massive star forming region in Aquila. Thedeconvolved 6 deg^2 (3\degree X 2\degree) maps provided by BLAST in 2005 at250, 350, and 500 micron were used to perform a preliminary characterization ofthe clump population previously investigated in the infrared, radio, andmolecular maps. Interferometric CORNISH data at 4.8 GHz have also been used tocharacterize the Ultracompact HII regions (UCHIIRs) within the main clumps. Bymeans of the BLAST maps we have produced an initial census of the submillimeterstructures that will be observed by Herschel, several of which are knownInfrared Dark Clouds (IRDCs). Our spectral energy distributions of the mainclumps in the field, located at ~7 kpc, reveal an active population withtemperatures of T~35-40 K and masses of ~10^3 Msun for a dust emissivity indexbeta=1.5. The clump evolutionary stages range from evolved sources, withextended HII regions and prominent IR stellar population, to massive youngstellar objects, prior to the formation of an UCHIIR.The CORNISH data haverevealed the details of the stellar content and structure of the UCHIIRs. Inmost cases, the ionizing stars corresponding to the brightest radio detectionsare capable of accounting for the clump bolometric luminosity, in most casespowered by embedded OB stellar clusters.

The BLAST View of the Star Forming Region in Aquila (ell=45deg,b=0deg)