BackForwardInstrument:  GOCI 

Instrument details
Acronym GOCI
Full name Geostationary Ocean Color Imager
Purpose Ocean colour and aerosol
Short description 8 channels in VIS/NIR [see detailed characteristics below]
Background New development
Scanning Technique Mechanical, 3-axis stabilised satellite, E-W continuous, S-N stepping
Resolution 500 m IFOV
Coverage / Cycle Area of 2500 km x 2500 km centred on 36°N / 130°E, hourly in daylight
Mass 78.2 kg Power 35 W Data Rate 2.67 Mbps (Uncompressed)

 

Providing Agency KIOST
Instrument Maturity Flown on operational programme
Utilization Period: 2011-03-17 to ≥2020
Last update: 2018-06-08
Detailed characteristics
Central wavelength Bandwidth SNR @ specified input spectral radiance
412 nm 20 nm 1000 @ 100 mW m-2 sr-1 μm-1
443 nm 20 nm 1090 @ 86 mW m-2 sr-1 μm-1
490 nm 20 nm 1170 @ 67 mW m-2 sr-1 μm-1
555 nm 20 nm 1070 @ 56 mW m-2 sr-1 μm-1
660 nm 20 nm 1010 @ 32 mW m-2 sr-1 μm-1
680 nm 10 nm 870 @ 31 mW m-2 sr-1 μm-1
745 nm 20 nm 860 @ 20 mW m-2 sr-1 μm-1
865 nm 40 nm 750 @ 16 mW m-2 sr-1 μm-1
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Passive optical radiometer or spectrometer
  • Moderate resolution optical imager
Mission objectives
Primary mission objectives
  • Aerosol Optical Depth
  • Aerosol column burden
  • Colour Dissolved Organic Matter (CDOM)
  • Fraction of Absorbed PAR (FAPAR)
  • Ocean Diffuse Attenuation Coefficient (DAC)
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Tentative Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
VariableRelevance for measuring this variableOperational limitationsExplanation
Aerosol column burden3 - highCloud sensitive.. Daylight only.VIS (with narrow bandwidth) and NIR channels including 760 nm for high-level aerosol
Aerosol effective radius3 - highCloud sensitive.. Daylight only.VIS (with narrow bandwidth) and NIR channels including 760 nm for high-level aerosol
Aerosol mass mixing ratio3 - highCloud sensitive.. Daylight only.VIS (with narrow bandwidth) and NIR channels including 760 nm for high-level aerosol
Aerosol Optical Depth3 - highCloud sensitive.. Daylight only.VIS (with narrow bandwidth) and NIR channels including 760 nm for high-level aerosol
Aerosol type3 - highCloud sensitive.. Daylight only.VIS (with narrow bandwidth) and NIR channels including 760 nm for high-level aerosol
Biomass5 - marginalCloud sensitive.. Index only.. Daylight only.VIS and NIR channels. Biomass inferred from NDVI
Cloud cover5 - marginalDaylight only.VIS and NIR channels
Cloud optical depth4 - fairLow-density cloud only.. Daylight only.VIS and NIR channels
Cloud top height5 - marginalDaylight only.NIR channels to estimate the total-column O2 above the cloud top as measured around 760 nm
Cloud type5 - marginalDaylight only.VIS and NIR channels
Colour Dissolved Organic Matter (CDOM)4 - fairCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Downward short-wave irradiance at Earth surface5 - marginalCloud sensitive.. Highly indirect.VIS and NIR channels
Earth surface albedo3 - highCloud sensitive.VIS channel with changing solar incidence angles as daylight progresses
Earth surface short-wave bidirectional reflectance4 - fairCloud sensitive.VIS and NIR channels with changing solar incidence angles as daylight progresses
Fire fractional cover5 - marginalCloud sensitive.. Coarse spatial resolution.. Daylight only.VIS channels
Fraction of Absorbed PAR (FAPAR)3 - highCloud sensitive.VIS channels including Red at 700 nm
Leaf Area Index (LAI)4 - fairCloud sensitive.. Daylight only.VIS and NIR channels. LAI inferred from NDVI
Normalised Difference Vegetation Index (NDVI)3 - highCloud sensitive.VIS and NIR channels
Ocean chlorophyll concentration 4 - fairCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Ocean Diffuse Attenuation Coefficient (DAC)4 - fairCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Ocean suspended sediments concentration4 - fairCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Oil spill cover5 - marginalCloud sensitive.. Daylight only.VIS channels with narrow bandwidth
Photosynthetically Active Radiation (PAR)3 - highCloud sensitive.VIS channels, range accurately sampled
Short-wave cloud reflectance5 - marginalNo specific limitation.VIS and NIR channels
Snow cover4 - fairCloud sensitive.. Daylight only.VIS and NIR channels. Frequent sampling (GEO) improves probability of cloud-free views
Soil moisture at surface5 - marginalCloud sensitive.. Index only.. Daylight only.VIS and NIR channels. Soil moisture inferred from differential brightness
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.VIS and NIR channels with changing solar incidence angles as daylight progresses
Aerosol volcanic ash3 - highCloud sensitive.. Daylight only.VIS and NIR channels including 760 nm for high-level ashes
Aerosol volcanic ash Total Column2 - very highCloud sensitive.. Daylight only.VIS and NIR channels including 760 nm for high-level ashes. Frequent sampling (GEO) enables early detection of ash plumes
Wind (horizontal)5 - marginalCloud or water vapour tracers needed.. Daylight only.VIS channel(s). Frequent sampling (GEO) enables inference from cloud motion