Survey observations began on May 3, 2008 and concluded on September 12, 2009, with ZOA (A2144) and GALFACTS (A2390) as commensal partners throughout. Preliminary indications are that no make-up observations are needed for I-GALFA primary data (Galactic H I), but some may be required for commensal partners. The map at left shows the cumulative sky coverage of all the survey observations. Individual night sky tracks can be viewed on the position plots page; other details are on the observing schedule. Mileposts:

2008 Apr - May	pre-survey tests
2008 May - Jun	field A observed
2008 Jun - Aug	field Z observed
2008 Aug - Oct	field D observed
2009 April	Mock + smartbasket tests
2009 May - Aug	field B observed
2009 Jul - Sep	field C observed
2011 July	full public data release

We welcome and encourage the use of I-GALFA data by external scientists. Those interested should consult our policies on external users, co-authorship, and acknowledgements.

The survey data products are 512x512x2048 voxel FITS spectral line image cubes in 2-byte scaled-integer format, with file sizes of about 1.0 GiB each when uncompressed. The cubes have 1' x 1' pixels and either 0.184 km/s or 0.736 km/s velocity channels, with resulting velocity coverage of either |VLSR| < 184 km/s or |VLSR| < 753 km/s for the ``narrow'' or ``wide'' cubes, respectively. Each cube covers 8.53 degrees on the sky and has center coordinates 8.00 degrees from those of its neighbor cubes, so that neighboring cubes overlap by 0.53 degrees. The map at right shows the I-GALFA Galactic FITS cube atlas tile lattice.

All I-GALFA data products are subject to an 18-month proprietary period before public release. The release date above presumes processing is finalized in 2010 January. Earlier access is possible via collaboration with one or more members of the I-GALFA survey team.