The GLIMPSE (Galactic Legacy Infrared Mid-Plane Survey Extraordinaire) Archive is an implementation of the GLIMPSE Highly Reliable Catalogue (GLMxC) and the GLIMPSE More Complete Archive (GLMxA), where x denotes the different data products I or II, resp. We hold the intermediate revision (dated 9th April 2005) as well as the version 2.0 data (dated 16th April 2007 for GLIMPSEI and 18th April 2008 for GLIMPSEII). This implementation uses the same default values as specified by GLIMPSE.

GLIMPSE is a fully sampled, confusion limited, 4-band near- to mid-infrared survey of the inner two-thirds of the Galactic disk with a spatial resolution of ~2 arcsec. The Infrared Array Camera (IRAC) imaged 220 square degrees at wavelengths centered on 3.6, 4.5, 5.8, and 8.0 microns in the Galactic longitude range 10 deg to 65 deg on both sides of the Galactic center and in Galactic latitude ±1 deg (GLIMPSEI) as well as l= -10 deg to 10 deg (GLIMPSEII).

The area covered by GLIMPSEI contains most of the star formation activity in the Galaxy and ~70% of the molecular gas in the Galaxy. The inner cutoff at | l | = 10 deg permits adequate sampling of both ends of the purported ~3 kpc central bar and possibly some of the nuclear bulge stellar population. We expect to determine the asymmetry of the bar (brighter at l > 0 deg) with high accuracy. The outer cutoff at | l | = 65 deg includes all of the 5 kpc molecular ring, the Sagittarius spiral arm tangent, and the Norma spiral arm tangent. The Galactic center region is not included because of its extreme background brightness and high confusion limits.
GLIMPSEII imaged longitudes ±10 deg of the central region of the Galaxy. The latitude coverage is ±1 deg from | l | = 10 deg to 5 deg, ±1.5 deg from | l | = 5 deg to 2 deg, and ±2 deg from | l | = 2 deg to 0 deg. GLIMPSEII coverage excludes the Galactic center region l = ±1 deg, b = ±0.75 deg observed by the GALCEN GO program (PID=3677).