+ Home Page
+ Search NASA Herschel Site
+ NASA Herschel Science Center
      - Observation Planning
            * FAQs
            * HSpot (planning tool)
            * AOR planning
            * Reserved Observation List
            * Proposal Calls
            * Past Proposal Calls
            * Data Processing Tools
      - Workshops
      - NHSC Telecons
      - Proposal Information
            * Approved Programs
      - Newsletters
      - Logos
+ Herschel Mission
+ Herschel Instruments
+ JPL Herschel Page
+ NHSC Staff
+ Speaker's Bureau
+ Cool Cosmos (Education)
+ Helpdesk
+ Contact Us

ESA Links

Herschel Science Center
(HSC-ESAC-Spain)
+ Main HSC Home Page
+ HSC Community Information
+ HSC Science Instruments Page
+ HSC AO Documentation
+ HSC AO Latest News
+ HSC European Helpdesk

+ Images & Videos
+ Herschel/ALMA Synergies


+ IPAC Homepage
+ IPAC Newsletter
+ IPAC Visiting Graduate
   Student Fellowship Program
+ IPAC Visitor Information
+ Additional Links



HIFI Frequently Asked Questions


General HIFI related questions:

Answers

Question: Is the noise referred to in the HIFI AORs a 1 sigma noise? 5 sigma?

Answer: It is close to 1-sigma. It is more exactly the rms of the residual of a base-lined spectrum as determined by the System Temperature, the integration time and the Allen Noise.

Back to NHSC FAQ main page