MESSENGER Data Release Calendar

Release	Release Date	Data Acquisition
1	Not online due to low demand; available on request	N/A (Ground calibration data)
2	December 15, 2007	Aug. 3, 2004 - June 5, 2007 (Earth and Venus flybys)
3	July 15, 2008	June 6, 2007 - Jan. 14, 2008 (First Mercury flyby)
4	April 15, 2009	Jan. 15, 2008 - Oct. 20, 2008 (Second Mercury flyby)
5	March 15, 2010	Oct. 21, 2008 - Sept. 29, 2009 (Third Mercury flyby)
6	September 8, 2011	Sept. 30, 2009 - Mar. 18, 2011 (Mercury orbit insertion + 2 months)
7	March 8, 2012	May 19, 2011 - Sept. 17, 2011 (Next 4 months of orbital operations)
8	September 7, 2012	Sept. 18, 2011 - Mar. 25, 2012 (Mar. 17 is end of primary mission; Mar. 25 is end of second full solar day of science operations)
9	March 8, 2013	Mar. 16, 2012 - Sept. 17, 2012
10	September 6, 2013	Sept. 18, 2012 - Mar. 17, 2013 (End of extended mission 1)
11	March 7, 2014	Aug. 3, 2004 - Mar. 17, 2013
12	September 5, 2014	Aug. 3, 2004 - Mar. 17, 2014
13	March 6, 2015	Aug. 3, 2004 - Mar. 17, 2014
14	October 9, 2015	Aug. 3, 2004 - ~Apr. 30, 2015 (End of extended mission 2 operations; final delivery of raw and calibrated products)
15	May 6, 2016	Aug. 3, 2004 - ~Apr. 30, 2015 (Delivery of advanced products; redelivery of previously delivered calibrated and advanced products with final SPICE and corrections)
16	May 12, 2017	Release 16 is the final release from the MESSENGER Project. It includes new derived products and revisions to some previously released products. See ERRATA.TXT in the root directory of each archive volume for details.