WIFS
in scheme: instruments
definition: The Wide Field Sensor (WiFS) is on-board the Indian Remote Sensing Satellite 1C (IRS-1C) launched in 1996. It collects images during mid-morning (about 10:30 AM) with a spatial resolution of about 200 meters in both a red and near-infrared spectral band. The temporal resolution/revisit time frame is five days, which is an improvement over the two weeks of the Landsat systems, but still not as frequent as that of the GOES (every 15-30 minutes) or SeaWiFS (once per day). A major advantage of this data set is that it fills in the spatial resolution gap between the Landsat TM and MSS (30 and 75 meters, respectively) and the GOES and SeaWiFS (1 km) data sets. This, combined with the fact that our eolian erosion vulnerability image-mapping algorithm uses the red and near-infrared bands (the two bands collected by WiFS), allows excellent regional image maps to be made using these data. The five day temporal resolution makes them better than the Landsat MSS and TM data for possible i maging of active dust storms, but still not acceptable for operational monitoring and detection of active dust storms. Group: Instrument_Details Entry_ID: WIFS 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: WIFS Long_Name: Wide Field Scanner End_Group Group: Associated_Platforms Short_Name: IRS-P3 Short_Name: IRS-1D Short_Name: IRS-1C End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Visible Number_Channels: 2 Spectral_Frequency_Coverage_Range: 0.62 μm - 0.68 μm End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Near Infrared Number_Channels: 2 Spectral_Frequency_Coverage_Range: 0.77 μm - 0.86 μm End_Group Online_Resource: http://www.nrsa.gov.in/satellites/irs-1d.html Creation_Date: 2008-08-15 Group: Instrument_Logistics Instrument_Owner: India End_Group End_Group
type: Concept

Imaging Spectrometers/Radiometers
type: Concept