@prefix ns0: . @prefix skos: . ns0:resource [ ] ; ns0:altLabel [ ] ; skos:definition """IRIS (Greek goddess of the rainbow and the messenger of the gods). The objective is to provide multispectral imagery in the visible and near-infrared wavelength range. Specific objectives are: • To demonstrate X-Sat capabilities for remote sensing in the South East Asia region • To take imagery and collect spatial and radiometric information of land to monitor and manage forests, plantations, urban areas and urban infrastructure • To detect significant environmental events, such as forest fires, floods and landslides, as quickly as possible and provide timely coverage to monitor the development of these events. The IRIS camera is being funded by DSO National Laboratories and designed and built by SaTReCi (SaTReC Initiative Co. Ltd. of Daejeon, Korea; SaTReCi is the commercial spin-off from SaTReC), the contractor to NTU. The IRIS instrument is an upgraded version of the KITSAT-3 multispectral imager. IRIS development at SaTReCi was initiated in April 2002. 17) 18) IRIS consists of an optical and an electronics module. The optical module in turn consists of mirrors, lenses, baffles, detectors, detector front-end electronics, and structural parts. The electronics module consists of the power supply module, control module, and an IRIS-internal mass storage module. IRIS provides also a logical LVDS (Low Voltage Differential Signaling) interface to the PPU (via a RAMDisk) for real-time access to the raw data. The IRIS instrument design features a pushbroom scanner with three spectral bands: green (520 - 600 nm), red (630 - 690 nm), and NIR (760 - 890 nm). Each of the three linear detector arrays consists of 5000 active elements, which were all manufactured on the same wafer and subsequently coated with different interference filters to select the appropriate spectral characteristic (the FPA houses a quad-linear detector array and the proximity electronics). The design provides a high degree of band-to-band alignment, i.e. 0.1 pixels. The spatial resolution is 10 m GSD (Ground Sample Distance) on a swath of 50 km. The IRIS optics employs a Mangin telescope design with a primary and secondary mirror as well as two correction lenses; the aperture diameter is 120 mm. Internally the IRIS is equipped with a redundant signal processing and control module (based on a PowerPC architecture) which preprocesses the image data (along with Reed Salomon coding) prior to storage in the 8 Gbit memory module (independent of the RAM-Disk). Access to the image data is through a 50 Mbit/s LVDS link that reads the encoded data from the storage after image acquisition and an 81 Mbit/s link that enables realtime access during imaging. [Text Source: eorportal.org, http://directory.eoportal.org/] Group: Instrument_Details Entry_ID: IRIS-XSAT Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Passive Remote Sensing Instrument_Type: Photon/Optical Detectors Instrument_Subtype: Cameras Short_Name: IRIS-XSAT Long_Name: IRIS on X-Sat End_Group Group: Associated_Platforms Short_Name: X-SAT End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Visible Spectral_Frequency_Coverage_Range: 0.52 micrometers - 0.60 micrometers End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Visible Spectral_Frequency_Coverage_Range: 0.63 micrometers - 0.69 micrometers End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Near Infrared Spectral_Frequency_Coverage_Range: 0.76 micrometers - 0.89 micrometers End_Group Online_Resource: http://directory.eoportal.org/presentations/7105/8557.html Online_Resource: http://www.dso.org.sg/home/index.aspx Sample_Image: http://directory.eoportal.org/presentations/7105/XSAT_Auto5.jpeg Creation_Date: 2008-07-07 Group: Instrument_Logistics Instrument_Owner: CREST, NTU (Nanyang Technological University), DSO National Laboratories, Singapore End_Group End_Group"""@en ; skos:prefLabel "IRIS-XSAT"@en ; skos:inScheme ; skos:broader ; a skos:Concept . skos:prefLabel "Cameras"@en ; a skos:Concept ; skos:narrower .