@prefix ns0: . @prefix skos: . ns0:resource [ ] ; skos:changeNote """2013-02-07 11:01:45.0 [saritz] Insert Concept add broader relation (TIRS [58207caf-121d-4f88-bd79-11cafefa3f5b,82113] - Imaging Spectrometers/Radiometers [944b7691-af37-4fb4-9393-c114e7997829,74845]); """ ; ns0:altLabel [ ] ; skos:definition """[Source: NASA LDCM Homepage, http://ldcm.nasa.gov/spacecraft_instruments/tirs.html ] The Thermal Infrared Sensor (TIRS) will measure land surface temperature in two thermal bands with a new technology that applies quantum physics to detect heat. TIRS was added to the satellite mission when it became clear that state water resource managers rely on the highly accurate measurements of Earth's thermal energy obtained by LDCM's predecessors, Landsat 5 and Landsat 7, to track how land and water are being used. With nearly 80 percent of the fresh water in the Western U.S. being used to irrigate crops, TIRS will become an invaluable tool for managing water consumption. TIRS uses Quantum Well Infrared Photodetectors (QWIPs) to detect long wavelengths of light emitted by the Earth whose intensity depends on surface temperature. These wavelengths, called thermal infrared, are well beyond the range of human vision. QWIPs are a new, lower-cost alternative to conventional infrared technology and were developed at NASA's Goddard Space Flight Center in Greenbelt, Md. The QWIPs TIRS uses are sensitive to two thermal infrared wavelength bands, helping it separate the temperature of the Earth's surface from that of the atmosphere. Their design operates on the complex principles of quantum mechanics. Gallium arsenide semiconductor chips trap electrons in an energy state 'well' until the electrons are elevated to a higher state by thermal infrared light of a certain wavelength. The elevated electrons create an electrical signal that can be read out and recorded to create a digital image. More Information: http://ldcm.nasa.gov/spacecraft_instruments/tirs.html Group: Instrument_Details Entry_ID: TIRS Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Passive Remote Sensing Instrument_Type: Spectrometers/Radiometers Instrument_Subtype: Imaging Spectrometers/Radiometers Short_Name: TIRS Long_Name: Thermal Infrared Sensor End_Group Group: Associated_Platforms Short_Name: LANDSAT-8 End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Infrared > Thermal Number_Channels: 1 Spectral_Frequency_Coverage_Range: 10.6-11.2 μm End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Infrared > Thermal Number_Channels: 1 Spectral_Frequency_Coverage_Range: 11.5-12.5 μm End_Group Online_Resource: http://ldcm.nasa.gov/spacecraft_instruments/tirs.html Sample_Image: http://www.nasa.gov/images/content/566479main_ldcm-TIRS2.jpg Creation_Date: 2013-02-07 Group: Instrument_Logistics Instrument_Owner: USA/NASA Instrument_Owner: USA/NOAA End_Group End_Group"""@en ; skos:prefLabel "TIRS"@en ; skos:inScheme ; skos:broader ; a skos:Concept . skos:prefLabel "Imaging Spectrometers/Radiometers"@en ; a skos:Concept ; skos:narrower .