BackForwardInstrument:  TEMPO 

Instrument details
Acronym TEMPO
Full name Tropospheric Emissions: Monitoring of Pollution
Purpose Frequent observation of O3, NO2, SO2, HCHO, C2H2O2, aerosols, cloud and UV-B.
Short description Grating spectrometers covering the UV and VIS interval 293-494 nm and 538-741 nm with a spectral sampling of 0.2 nm.
Background New development for air quality.
Scanning Technique Cross-nadir scanning from GEO. Observed area limited to North America. There is a monitoring mode over CONUS and targeted mode for special events (e.g. volcanic eruptions, wild fires etc.).
Resolution 2.0 x 4.75 km at ssp
Coverage / Cycle CONUS at several minutes to hourly intervals depending on area and species. Data latency < 2hrs.
Mass Power Data Rate

 

Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2023 to 2025
Last update: 2023-12-21
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
  • Cross-nadir shortwave (UV/VIS) sounder
WIGOS Subcomponents
  • Subcomponent 1
  • UV/VIS/NIR sounders [in GEO]
  • UV/VIS/NIR sounder [in GEO]
  • Subcomponent 3
  • NIR spectrometer
  • NIR spectrometer
Mission objectives
Primary mission objectives
  • BrO
  • CH3Br
  • ClO
  • H2O
  • HCHO
  • HCHO Total Column
  • NO
  • NO2
  • NO2 Total Column
  • O3
  • O3 Total Column
  • SO2
  • SO2 Total Column
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
Aerosol column burden2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol effective radius2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol mass mixing ratio2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol Optical Depth2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
Aerosol type2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol) and VIS spectrometry
BrO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. BrO lines around 300 nm. Frequent sampling (GEO) enables monitoring diurnal variations
HCHO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm. Frequent sampling (GEO) enables monitoring diurnal variations
HCHO Total Column*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm. Frequent sampling (GEO) enables monitoring diurnal variations
CH3Br*3 - highCloud sensitive.. Daylight only.Spectrometry in the HC3Br band from 200 to 250 nm
ClO*1 - primaryCloud sensitive.. Daylight only.UV Spectrometry. ClO lines around 300 nm Frequent sampling (GEO) enables monitoring diurnal variations
Cloud cover5 - marginalDaylight only.VIS spectroscopy
Cloud optical depth5 - marginalLow-density cloud only.. Daylight only.VIS spectrometry
Earth surface short-wave bidirectional reflectance5 - marginalCloud sensitive.VIS spectrometry. GEO sees changing solar incidence angles as daylight progresses
H2O*3 - highCloud sensitive.. Daylight only.UV and VIS spectrometry. Several weak bands. Frequent sampling (GEO) enables monitoring diurnal variations
NO*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. NO lines around 250 nm. Frequent sampling (GEO) enables monitoring diurnal variations
NO2*1 - primaryCloud sensitive.. Daylight only.UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm
NO2 Total Column*1 - primaryCloud sensitive.. Daylight only.UV and VIS spectrometry. Several NO2 lines. Frequent sampling (GEO) enables monitoring diurnal variations
O3*2 - very highCloud sensitive.. Daylight only.UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis). GEO enabling frequent sampling (GEO) for diurnal variations
O3 Total Column*2 - very highCloud sensitive.. Daylight only.UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis). GEO enabling frequent sampling (GEO) for diurnal variations
PSC occurrence2 - very highMarginal view from GEO.. Daylight only.UV and VIS spectrometry
SO2*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm. Frequent sampling (GEO) for sources monitoring
SO2 Total Column*1 - primaryCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm. Frequent sampling (GEO) for sources monitoring
Upward short-wave irradiance at TOA3 - highSpectral interpolation needed.. Information on BRDF needed.UV and VIS spectrometry
Upward spectral radiance at TOA5 - marginalMissing NIR, SWIR and all Long-waves.UV and VIS spectrometry
Aerosol volcanic ash2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash) and VIS spectrometry
Aerosol volcanic ash Total Column2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash) and VIS spectrometry. Frequent sampling (GEO) for early detection of ash plumes