HIRS/4 > High Resolution Infrared Radiation Sounder/4

 (MI_Instrument) uuid: 8293FAD4B88E75F2E040AC8C5AB4576F
    citation:  (CI_Citation)
        title:  NOAA KLM User's Guide, Section 3.2.2, HIRS/4
        date:  (CI_Date)
            date:  2000-09
            dateType:  (CI_DateTypeCode) publication
        edition:  revision
        identifier:  (MD_Identifier)
            code:  gov.noaa.ngdc.fgdccitation:25125
        citedResponsibleParty:  (CI_ResponsibleParty)
            individualName:  Goodrum, Geoffrey (ed.)
            role:  (CI_RoleCode) originator
        citedResponsibleParty:  (CI_ResponsibleParty)
            individualName:  DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
            role:  (CI_RoleCode) publisher
    citation:  (CI_Citation)
        title:  ATOVS Level 1b Products Guide, HIRS/4
        date:  (CI_Date)
            date:  2004-09-08
            dateType:  (CI_DateTypeCode) publication
        identifier:  (MD_Identifier)
            code:  gov.noaa.ngdc.fgdccitation:30495
        citedResponsibleParty:  (CI_ResponsibleParty)
            organisationName:  EUMETSAT > European Meteorological Satellite Organisation
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  +49(0)6151-807 7
                    facsimile:  +49(0)6151-807 555
                address:  (CI_Address)
                    deliveryPoint:  EUMETSAT Eumetsat Allee 1
                    city:  Darmstadt
                    administrativeArea:  N/A
                    postalCode:  D-64295
                    country:  Germany
                contactInstructions:  For information, go to: http://www.eumetsat.int/Home/Main/AboutEUMETSAT/Contact_Us/index.htm?l=en
            role:  (CI_RoleCode) originator
    identifier:  (MD_Identifier)
        code:  HIRS/4 > High Resolution Infrared Radiation Sounder/4
    type:  sounder
    description:  Instrument Type: sounder, Operational Mode: cross-track, Collection Type: continuous scan, Other Information: The HIRS/4 instrument provides multispectral data from one visible channel (0.69 m), seven shortwave channels (3.7 to 4.6 m) and twelve longwave channels (6.7 to 15 m) using a single telescope and a rotating filter wheel containing twenty individual spectral filters. An elliptical scan mirror provides cross-track scanning of 56 steps in increments of 1.8 degrees. The mirror steps rapidly (<35 msec), then holds at each position while the optical radiation , passing through the 20 spectral filters, is sampled. This action takes place each 0.1 second. The instantaneous field of view for each channel is approximately 0.7 degrees which, from a spacecraft altitude of 833 km, encompasses a circular area of 10 km at nadir on the earth.