Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.naic.edu/alfa/gen_info/timeline.shtml
Äàòà èçìåíåíèÿ: Unknown
Äàòà èíäåêñèðîâàíèÿ: Tue Oct 2 06:20:22 2012
Êîäèðîâêà:
Ïîèñêîâûå ñëîâà: ngc 891

ALFA

ALFA Timeline

May 2002	Call for declaration of interest by potential ALFA users
Jul 2002	Contract signed with CSIRO for construction of multibeam receiver system
Sep 2002	Multibeam receiver interface meeting at Arecibo, including discussion of front-end specifications and design
Nov 2002	Final design of receiver system set. Manufacturing of receiver system begins
Sep 2003	Feed array manufacture
Dec 2003	Feed array testing completed
Feb 2004	Receiver construction completed
Mar 7-22, 2004	Receiver acceptance tests at CSIRO completed
Mar 22-26, 2004	Gregorian dome rotary floor refurbishment
Mar 24, 2004	ALFA Frontend packed-up and shipped from CSIRO to Arecibo
Apr 1, 2004	ALFA receiver delivered to Arecibo
Apr 1-18, 2004	ALFA pre-installation testing
Apr 19-20, 2004	ALFA frontend installation in Gregorian dome
Apr 21, 2004	ALFA commissioning begins
Aug 2004	ALFA shared-risk precursor surveys begin
Feb 2005	Major ALFA surveys begin
Apr 16, 2007	ALFA removed for telescope painting
Dec 10, 2007	ALFA reinstalled after painting

ALFA: from Australia to Arecibo

hot/sky testing in Australia	measuring Tsys with a cold load	filling the load with liquid nitrogen	ice crystals formed on the load
packing up at Marsfield	ALFA is delivered: April 1, 2004	taking possession of ALFA	Barbara is happy to see ALFA!
ALFA disassembly in the Transmitter Lab	test drive ALFA down the bowl	ALFA loaded on the truck	ALFA left on the truck overnight
preparing to hoist ALFA	raising ALFA	ALFA soars	ALFA approaches the dome
ALFA entering the dome	ALFA lowered into the rotary floor	ALFA is installed	ALFA is installed

Pictures courtesy of Steve Torchinsky

ALFA Re-Installation after Telescope Painting

Ready to roll [med] [big]	Top view [med] [big]	ALFA's raincoat [med] [big]	Duct tape rules! [med] [big]
A new day dawns [med] [big]	Driving under the dish [med] [big]	Launch preparations [med] [big]	Up, up, and away! [med] [big]
ALFA is lifted through the center of the dish [med] [big]	A long way to go [med] [big]	ALFA rising [med] [big]	ALFA approaches the platform [med] [big]
The Gregorian dome is driven toward ALFA [med] [big]	The platform crew take hold of ALFA [med] [big]	The protective wrapping is removed [med] [big]	Safely inside the Gregorian dome [med] [big]

Pictures courtesy of Dana Whitlow and Robert Michin