WMO OSCAR | Details for Instrument MAESTRO

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Instrument: MAESTRO

Instrument details

Acronym	MAESTRO
Full name	Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation
Purpose	Atmospheric chemistry at high latitudes and high altitude. Tracked species: H2O, NO2, O3 and aerosol
Short description	UV/VIS/NIR grating spectrometer in the range 285-1030 nm, spectral resolution 1-2 nm, SNR > 1000 at the expected input spectral radiance
Background	New development
Scanning Technique	Sun occultation
Resolution	Vertical: 1-2 km - Horizontal: effective 500 km (limb sounding)
Coverage / Cycle	N/A because of the occultation geometry. Only occurring at high latitudes
Mass	8 kg	Power	15 W	Data Rate	3 Mbps

Providing Agency	CSA
Instrument Maturity	Flown on an R&D satellite
Utilization Period:	2003 to 2025
Last update:	2023-12-04

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

Science Satellite / Atmospheric Chemistry Experiment (CSA)
- SCISAT-1 (see instrument status) Nov 2003 - 2025

Instrument classification

Earth observation instrument
Limb sounders
Limb sounder

WIGOS Subcomponents

Subcomponent 1
UV/VIS/NIR sounders, nadir and limb
UV/VIS/NIR occultation limb sounder
Subcomponent 2
UV/VIS/NIR/IR/MW limb sounders
UV/VIS/NIR/IR occultation limb sounder

Mission objectives

Primary mission objectives

BrO
ClO
H2O
HCHO
NO
NO2
O3
SO2

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.

Search:

Variable	Relevance for measuring this variable	Operational limitations	Explanation
Aerosol mass mixing ratio	5 - marginal	Limited to high atmosphere.. Limited to high latitudes.. Daylight only.	UV, VIS, NIR limb sounding by solar occultation. Self-calibrating
BrO*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV spectrometry. BrO lines around 300 nm. Limb sounding by solar occultation.. Self-calibrating
HCHO*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV spectrometry. HCHO lines around 350 nm Limb sounding by solar occultation. Self-calibrating
ClO*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV spectrometry. ClO lines around 300 nm. Limb sounding by solar occultation. Self-calibrating
H2O*	5 - marginal	Daylight only.. Limited to high atmosphere.. Limited to high latitudes.	Spectrometry in UV and VIS (several weak bands) and NIR (strong band around 940 nm). Limb sounding by solar occultation. Self-calibrating
NO*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV spectrometry. NO lines around 250 nm. Limb sounding by solar occultation. Self-calibrating
NO2*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm. Limb sounding by solar occultation. Self-calibrating
O3*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis). Limb sounding by solar occultation. Self-calibrating
PSC occurrence	5 - marginal	Limited to high atmosphere.. Daylight only.	UV and VIS spectrometry. Limb sounding by solar occultation. Self-calibrating
SO2*	5 - marginal	Limited to high atmosphere.. Daylight only.	UV spectrometry. SO2 lines around 350 nm. Limb sounding by solar occultation. Self-calibrating
Specific humidity	5 - marginal	Limited to high atmosphere.. Limited to high latitudes.. Daylight only.	UV, VIS and NIR spectrometry with several water vapour bands (main: around 940 nm). Limb sounding by solar occultation, Self-calibrating
Aerosol volcanic ash	5 - marginal	Limited to high atmosphere.. Limited to high latitudes.. Daylight only.	UV, VIS and NIR spectrometry; limb sounding by solar occultation. Self-calibrating
Atmospheric temperature	5 - marginal	Limited to high atmosphere.. Daylight only.	VIS spectroscopy at lower resolution 10 nm

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