of Solar Flare Theory:
This short overview on solar flares tells you what physical phenomena HESSI will observe.
You have some time to study the details? Then look at the complete
HESSI proposal for more information
The fact sheet gives you an overview
of HESSI by the numbers.
HESSI is a collaboration between different institutions.
are located at:
Space Flight Center in Greenbelt, MD
-The Paul Scherrer Institute in Switzerland
-The UCB/Space Sciences Laboratory in Berkeley, CA
Astro in Gilbert, AZ
Explorer (SMEX) Science Missions Selected Phase
A study completed on January 20, 1998 and presented to
-Phase A study approved by NASA on February 23, 1998 and Phase B begins...
-Ground Station construction at SSL
dish arrives... October 4, 1999
Bus arrives at SSL from Spectrum
Astro. January 16, 2000
Damage During Vibration Testing. Press
release on incident available. Photos
and video clips of spacecraft before the mishap are
available here. March
board finds cause of HESSI mishap. Press
release available. May
-The Goddard Program Management
Council gives HESSI the go-ahead after reviewing the
mission's viability following the mishap in
March. See "Status & Events" for timeline of events since