document title / titre du document TRP W ORK PLAN ... - emits - ESA

TRP Work Plan 2005-2007
Description of Activities
TEC-SB/7935/dc
12/Feb/09
TRP Reference:
T104-18EE
Aerosol modeling and synergetic aerosol correction algorithms for passive optical/IR
Title:
sensors
The aim of this study is to enhance the wave interaction modeling of aerosols for passive optical remote sensing instruments.
A brief review of existing aerosol models and aerosol atmospheric corrections shall be performed. Assessment of the
empirical content and of the domain of validity of these models and algorithms shall be carried out. This study shall focus on a
sound theoretical description of the aerosol effects on the top of atmosphere observed surface reflectances. Separated and
concomitant multi-spectral / multi-angular / polarized approaches shall be studied to retrieve aerosol optical properties and to
correct surface reflectances for their effects. Synergetic approaches are strongly encouraged to solve the uncertainties
inherent to single instrument measurements and to test the general applicability of the aerosol correction algorithms output by
the study.
This activity would be beneficial for all passive optical imaging sensors (e.g. the candidate Earth Explorer missions A-SCOPE
and FLEX, or the GMES Sentinel-2 mission) and should also include occultation measurement techniques.
Deliverables:
Tested prototype algorithm
Current TRL: TRL1 Target TRL: TRL2-3 Application Need/Date: SW operational by 2009
Application/Mission: A-Scope, FLEX, GMES Sentinel-2 Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-419
Consistency with Harmonisation
Roadmap and Conclusions:
Not directly linked to harmonised technology.
TRP Reference: T104-20QC
Title:
SWIR Laser Diodes
Since a number of years Distributed-FeedBack (DFB) semiconductor laser diodes capable to be tuned to any frequency in the
Short Wave InfraRed (SWIR) domain, with wavelenghts up to ~2.8 micron, are available. They have been used on-ground in
telecommunications and can be regarded as the optical equivalent of the voltage control oscillators (VCO) in electronics: the
emitted wavelength depends only on well-controlled parameters in a robust and reproducible way. Fast tuning is possible by
e.g. current control and large mode-hop-free tuning ranges are achievable. Applications of these laser diodes in space
include remote sensing by active limb sounding. Very good frequency and intensity stability performance is required for this
and other applications, at output powers in the order of tens of mW in continuous wave (CW) operation. There is no
experience with such diodes in space and the capability to maintain the ground-proven performance in the space environment
is being questioned. This activity will select and fully analyse the most promising SWIR laser diodes with respect to the
relevant optical, electrical, mechanical, reliability parameters, deriving specific conclusions for the envisaged applications.
Deliverables:
Technical note
Current TRL: TRL2-3 Target TRL: TRL4 Application Need/Date: TRL5 by 2009
Active (optical) limb sounding missions,
Application/Mission: e.g. ACCURATE; optical communication Contract Duration:
missions
SW Clause : - Dossier0 Ref.:
Consistency with Harmonisation
Roadmap and Conclusions:
12 months
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