www.sron.nl/herschel--hifi-lea-menu-2561/hifiscience/key-programs-lea-menu-2668.html

Guaranteed Time Key Programs

The HIFI consortium has defined a number of agreed Key Programs encompassing the most important science possible with the HIFI instrument. These are listed below with links to the project-webpages.

HEXGAL - "Herschel EXtraGALactic" Key Project
Link to website of key project

HEXOS - "Herschel observations of EXtra-Ordinary Sources" Key Project 
The Orion and Sgr B2 Molecular Clouds
Link to website of key project

HIFISTARS - "Late stages in the stellar evolution as seen with HIFI" Key Project
Link to website of key project

HSSO - "Herschel Solar System Observations" Key Project
Water and Related Chemistry in the Solar System
Link to website of key project

HS3F/CHESS - "Spectral surveys of starforming regions" Key Project
Link to website of key project

PRISMAS - "PRobing InterStellar Molecules with Absorption line Studies" Key Project
Link to website of key project

WADI - "Warm And Dense Interstellar medium" Key Project
Link to website of key project

WISH - "Water In Star-forming regions with HIFI" Key Project
Link to website of key project