Reduced Resolution Geolocated and Calibrated TOA Radiance

Description

The Medium Resolution Imaging Spectrometer (MERIS) is one of 10 sensors deployed in March of 2002 on board the polar-orbiting Envisat-1 environmental research satellite by the European Space Agency (ESA). The MERIS instrument is a moderate-resolution wide field-of-view push-broom imaging spectroradiometer capable of sensing in the 390 nm to 1040 nm spectral range. Being a programmable instrument, it had the unique capability of selectively adjusting the width and location of its 15 bands through ground command. The instrument has a 68.5-degree field of view and a swath width of 1150 meters, providing a global coverage every 3 days at 300 m resolution. Communication with the Envisat-1 satellite was lost suddenly on the 8th of April, 2012, just weeks after celebrating its 10th year in orbit. All attempts to re-establish contact were unsuccessful, and the end of the mission was declared on May 9th, 2012. The 4th reprocessing cycle, in 2020, has produced both the full-resolution and reduced-resolution L1 and L2 MERIS products. EN1_MDSI_MER_RR__1P is the short-name for the MERIS Level-1 reduced resolution, geolocated and calibrated top-of-atmosphere (TOA) radiance product. This product contains the TOA upwelling spectral radiance measurements at reduced resolution. The in-band reference irradiances for the 15 MERIS bands are computed by averaging the in-band solar irradiance for each pixel. Each pixel’s in-band solar irradiance is computed by integrating the reference solar spectrum with the band-pass of each pixel. The Level-1 product contains 22 data files: 15 files contain radiances for each band (one band per file) along with associated error estimates, and 7 annotation data files. It also includes a Manifest file that provides metadata information describing the product.

Resources

Name Format Description Link
5 https://ladsweb.modaps.eosdis.nasa.gov%2Fsearch%2Forder%2F2%2FEN1_MDSI_MER_RR__1P--489
5 https://earth.esa.int%2Feogateway%2Fsearch%3FskipDetection%3Dtrue%26text%3D%26category%3DDocument%2520library%26filter%3DEnvisat%2CMERIS
5 https://ladsweb.modaps.eosdis.nasa.gov%2Farchive%2FallData%2F489%2FEN1_MDSI_MER_RR__1P
5 https://ladsweb.modaps.eosdis.nasa.gov/search/order/2/EN1_MDSI_MER_RR__1P--489
5 https://earth.esa.int/eogateway/search?skipDetection=true&text=&category=Document%2520library&filter=Envisat%2CMERIS
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C2151223365-LAADS.iso19115
5 https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/489/EN1_MDSI_MER_RR__1P

Tags

  • earth-science-ocean-optics-oceans-ocean-color
  • earth-science-clouds-atmosphere-cloud-microphysics-cloud-precipitable-water
  • earth-science-cloud-properties-atmosphere-clouds-cloud-properties-cloud-ceiling
  • earth-science-ultraviolet-wavelengths-spectral-engineering-ultraviolet-radiance
  • earth-science-infrared-wavelengths-spectral-engineering-infrared-radiance
  • earth-science-visible-wavelengths-spectral-engineering-visible-radiance
  • earth-science-landscape-land-surface-landscape-ecology

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