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    <skos:prefLabel xml:lang="en">AMR</skos:prefLabel>
    <skos:definition xml:lang="en">The Advanced Microwave Radiometer (AMR), is an enhanced version of the Jason-1 Microwave Radiometer (JMR). Like the JMR, it acquires measurements via three separate frequency channels to determine the path delay of the altimeter&apos;s radar caused by atmospheric water vapor. This instrument measures radiation from Earth&apos;s surface at three frequencies (18, 21 and 37 GHz). Measurements acquired at each frequency are combined to determine atmospheric water vapor and liquid water content. Once the water content is known, we can determine the correction to be applied for radar signal path delays.Additional information on the AMR is available on the AVISO site. [Description Source:  NASA JPL Ocean Surface Topography from Space Home Page]Group: Instrument_Details   Entry_ID: AMR   Group: Instrument_Identification      Instrument_Category: Earth Remote Sensing Instruments      Instrument_Class: Passive Remote Sensing      Instrument_Type: Spectrometers/Radiometers      Instrument_Subtype: Radiometers      Short_Name: AMR      Long_Name: Advanced Microwave Radiometer   End_Group   Group: Associated_Platforms      Short_Name: OSTM/JASON-2   End_Group   Group: Spectral_Frequency_Information      Wavelength_Keyword: Microwave      Spectral_Frequency_Coverage_Range: 18.7, 23.8, and 34 GHz   End_Group   Online_Resource: http://sealevel.jpl.nasa.gov/mission/ostm-sc-inst.html   Online_Resource: http://www.aviso.oceanobs.com/en/missions/current-missions/jason-2/instruments/amr/index.html   Sample_Image: http://www.aviso.oceanobs.com/typo3temp/pics/97616634ad.jpg   Creation_Date: 2008-07-10   Group: Instrument_Logistics      Instrument_Owner: USA/NASA   End_GroupEnd_Group</skos:definition>
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