BackForwardInstrument:  SPEXone 

Instrument details
Acronym SPEXone
Full name SPEXone Polarimeter
Purpose SPEXone will enable measurements of optical and micro-physical properties of aerosols.
Short description

SPEXone is a multi-angle polarimeter. It measures the intensity, Degree of Linear Polarization and Angle of Linear Polarization of sunlight reflected back from the atmosphere, land surface, and ocean. Spectral range is 385-770 nm continuous coverage, resolution 2-5 nm with a 2% radiometric accuracy. More details here
Background

A new development.
Scanning Technique

Viewing angles 0°, ±20° and ±58° (on ground)
Resolution 5.4 x 4.6 km2
Coverage / Cycle 100 km swath. Global coverage in 1 month.
Mass 15 kg Power 20 W Data Rate

 

Providing Agency NSO
Instrument Maturity Backed by strong heritage
Utilization Period: 2024 to 2027
Last update: 2024-02-19
Detailed characteristics
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
WIGOS Subcomponents
  • Subcomponent 2
  • Multi-angle, multi-polarization radiometers
  • Multi-angle, multi-polarization radiometer
Mission objectives
Primary mission objectives
  • Aerosol Absorption Optical Depth
  • Aerosol Optical Depth [550nm]
  • Aerosol column burden
  • Aerosol dust concentration
  • Aerosol particle light extinction coefficient [532nm]
  • Aerosol single-scattering albedo
  • Aerosol species total column burden
  • Aerosol type
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
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Colour Dissolved Organic Matter (CDOM)1 - primaryCloud sensitive.. Daylight only.Many narrow-bandwidth VIS channels, suitable for more water types, in open ocean and coastal zone
Ocean chlorophyll concentration 1 - primaryCloud sensitive.. Daylight only.Many narrow-bandwidth VIS channels, suitable for more water types, in open ocean and coastal zone
Ocean Diffuse Attenuation Coefficient (DAC)1 - primaryCloud sensitive.. Daylight only.Many narrow-bandwidth VIS channels, suitable for more water types, in open ocean and coastal zone
Ocean suspended sediments concentration1 - primaryCloud sensitive.. Daylight only.Many narrow-bandwidth VIS channels, suitable for more water types, in open ocean and coastal zone