BackForwardInstrument:  COCTS 

Instrument details
Acronym COCTS
Full name China Ocean Colour & Temperature Scanner
Purpose Ocean colour and sea surface temperature
Short description 10 channels (8 narrow-bandwidth in VNIR, 2 in TIR) [see detailed characteristics below]
Background Consolidated technology
Scanning Technique Cross-track scanning. 1024 pixel/line, swath 1400 km
Resolution 1.1 km s.s.p.
Coverage / Cycle Global daily coverage for short-wave channels, two coverages/day for TIR channels
Mass 50 kg Power 70 W Data Rate 670 kbps

 

Providing Agency NSOAS
Instrument Maturity Flown on operational programme
Utilization Period: 2002 to ≥2029
Last update: 2012-09-05
Detailed characteristics
Central wavelength Bandwidth SNR or NE∆T @ specified input 
412 nm 20 nm …… @ …… W m-2 sr-1 µm-1
443 nm 20 nm …… @ …… W m-2 sr-1 µm-1
490 nm 20 nm …… @ …… W m-2 sr-1 µm-1
520 nm 20 nm …… @ …… W m-2 sr-1 µm-1
565 nm 20 nm …… @ …… W m-2 sr-1 µm-1
670 nm 20 nm …… @ …… W m-2 sr-1 µm-1
765 nm 40 nm …… @ …… W m-2 sr-1 µm-1
865 nm 40 nm …… @ …… W m-2 sr-1 µm-1
10.85 μm 1.10 μm 0.2 K @ 300 K
11.95 μm 1.10 μm 0.2 K @ 300 K
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
  • Biomass
  • Colour Dissolved Organic Matter (CDOM)
  • Earth surface albedo
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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 radius5 - marginalCloud sensitive.. Daylight only.VIS (with narrow bandwidth) and NIR channels including 760 nm for high-level aerosol
Aerosol mass mixing ratio4 - fairCloud 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 type4 - fairCloud 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 cover4 - fairNo specific limitation.VIS, NIR and TIR channels
Cloud optical depth4 - fairLow-density cloud only.. Daylight only.VIS and NIR channels
Cloud top height3 - highNo specific limitation.TIR window channels to estimate cloud top height from its temperature
Cloud top temperature3 - highNo specific limitation.TIR window channels
Cloud type4 - fairDaylight only.VIS and TIR channels
Colour Dissolved Organic Matter (CDOM)3 - highCloud 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 albedo4 - fairCloud sensitive.VIS channels
Fire fractional cover4 - fairCloud sensitive.. Coarse spatial resolution.VIS and TIR channels
Fire radiative power5 - marginalCloud sensitive.. Coarse spatial resolution.TIR channels
Fire temperature5 - marginalCloud sensitive.. Coarse spatial resolution.TIR channels
Fraction of Absorbed PAR (FAPAR)2 - very highCloud sensitive.VIS channels including Red at 700 nm
Land surface temperature5 - marginalCloud sensitive.TIR split window channels around 11 micrometers for water vapour correction
Leaf Area Index (LAI)5 - marginalCloud sensitive.. Daylight only.VIS and NIR channels. LAI inferred from NDVI
Normalised Difference Vegetation Index (NDVI)2 - very highCloud sensitive.VIS and NIR channels
Ocean chlorophyll concentration 3 - highCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Ocean Diffuse Attenuation Coefficient (DAC)3 - highCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Ocean suspended sediments concentration3 - highCloud sensitive.. Daylight only.Many narrow-bandwith VIS channels, suitable for more water types, in open ocean
Oil spill cover3 - highCloud sensitive.. Daylight only.VIS channels with narrow bandwidth
Photosynthetically Active Radiation (PAR)3 - highCloud sensitive.VIS channels, range accurately sampled
Sea surface temperature4 - fairCloud sensitive.TIR split window channels around 11 micrometers for water vapour correction
Sea-ice cover4 - fairCloud sensitive.VIS, NIR (for contour enhancement) and TIR channels
Short-wave cloud reflectance4 - fairNo specific limitation.VIS and NIR channels
Snow cover5 - marginalCloud sensitive.. Daylight only.VIS and NIR channels
Soil moisture at surface5 - marginalCloud sensitive.. Index only.VIS and TIR window channels. Soil moisture inferred from thermal inertia
Integrated Water Vapour (IWV)4 - fairCloud sensitive.. Low troposphere dominant.TIR channels in the 11 micrometers split window
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.. Information on BRDF needed.VIS and NIR channels
Aerosol volcanic ash4 - fairCloud sensitive.. Daylight only.VIS and NIR channels including 760 nm for high-level ashes
Aerosol volcanic ash (Total column)3 - highCloud sensitive.. Daylight only.VIS and NIR channels including 760 nm for high-level ashes
Wind (horizontal)5 - marginalCloud or water vapour tracers needed.. Polar regions only.TIR channel(s) around 11 micrometers window