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Lidar Emitter and Multispecies greenhouse gases Observation iNstrument

Periodic Reporting for period 1 - LEMON (Lidar Emitter and Multispecies greenhouse gases Observation iNstrument)

Reporting period: 2019-01-01 to 2020-02-29

The need for a European satellite-borne observation capacity to monitor CO2 emissions at global, European and country scale was identified at the climate conference in Paris 2015 and stated in the Copernicus report “Towards European operational observing system monitor fossil CO2 emissions”.
LEMON main objective is to provide a new versatile Differential Absorption Lidar (DIAL) sensor concept able to measure CO2, CH4 and water vapour stable isotopes (H2O and HDO) with a single laser emitter, paving the way to a new generation of instruments, easily adaptable for each species for future space observation.
LEMON gathers 8 partners from 6 countries, including research centres, universities and SMEs, with full expertise at Earth Observation technologies, from receiver, data acquisition, instrument control and versatile emitter.
LEMON will contribute to:
• Demonstrate unprecedented versatility by the possibility to address multi-species and achieve simultaneous LIDAR detection for some of them.
• Perform the first range resolved water vapour and isotopes LIDAR measurements, leading to a better understanding in meteorology.
• Technical breakthroughs in terms of laser emitter output energy and wavelength tunability (1.98-2.3μm tunability) compared to a around 0.01μm for the state-of-the art LIDAR emitters at 2.05μm.
• Elaborate a roadmap to integrate LEMON GFCU in future space missions.
• Disseminate the LEMON concept to space agencies and end-users to sustain LEMON exploitation.
WP1 Management (ONERA)
Main achievements:
• Project monitoring and control, organisation of remote monthly project meetings and three physical meetings, production of minutes.
• Coordination and quality review activities to achieve milestones and submit contractual deliverables (D1.1 Project Handbook, D1.2 Risk Management, D1.3 Gender Equity Policy, D1.4 Data Management Plan, D2.1 System and sub-system specifications, D2.2 System & sub-system specifications update, D2.3 Critical Design Review report, D6.2 Dissemination action plan, D6.3 Communication set).
• RedMine management platform and project-internal document repository set up and regularly updated with all project documents.
• Coordination of the Interim Report (M06, M12) and Progress Reporting 1 (M14).
• Administrative and financial management: coordination of GA and CA signatures, pre-financing distribution, production of project templates and guidelines (for presentations, meeting minutes and information package, deliverables, reporting, risk register, risk management plan, change requests).
• Production and regular update of monitoring tools: list of GA, EB and WP meetings, action points list and dissemination events; dissemination-exploitation follow-up; deliverables and milestones follow-up; risk management; PM and financial monitoring Excel file.
WP2 Requirements and Instrument Design (ONERA)
Main achievements:
• Instrument and sub-system specifications defined, resulting in the submission of D2.1 (System and sub-systems specifications) and D2.2 (System and sub-systems specifications update).
• Work on the instrument and its sub-systems design, resulting in the delivery of D2.3 (Critical design review document v1).
• Work has been performed on the sub-systems (transmitter TREE, receiver ARM, frequency reference unit FRUit) designs, including calculations and preliminary experiments.
• Optical critical design review (Optical CDR) held in September 2019.
• Initiation of the Mechanical design of the instrument; overall instrument critical design review (CDR) (January 2020).
WP3 Manufacturing (Fraunhofer ILT)
Main achievements:
• Mechanical design refinement of system and sub-systems.
• 1 mechanical readiness review initiated (ongoing).
• Different interfaces documents initiated:
o 1 Opto-mechanical interface document for the emission.
o 1 electronical interface document between the emission sub-systems initiated.
• New risks identified, concerning i) the interfaces between the sub-systems, which has been mitigated by the realisation of the two interfaces documents mentioned above; ii) the laser-induced damage threshold of the optics identified, preliminary testing of several optics from different suppliers carried out to mitigate this risk; and iii) the vibration environment effect in the aircraft on the optical bench operation, this risk is mitigated by the test of different damping systems.
WP4 Instrument ground validation and airborne demonstration (CNRS)
Main achievements:
• Characterisation of water vapour isotopologues variability above and around the Lac d’Annecy during a preliminary campaign, funded within the French ANR project WAVIL. Closure analysis of water vapour H2O/HDO over the Lac d’Annecy in the boundary layer, including surface forcing and process in the clouds at the top of the boundary layer.
• Implementation of strategies to optimise the intercomparison of ground-based lidar H2O profiles with airborne Picarro measurements.
• Calibration procedure of H2O/HDO Picarro airborne measurements tested in an ULA to be used as a testbed for the preparation of the measurements on ATR42 aircraft.
• Preliminary analysis of the preparatory field campaign conducted in the Lac d’Annecy region in June 2019, in particular: i) airborne H2O/HDO observations over the lake and surrounding valleys on-board two ultra-light aircraft, one of which embarked a Picarro instrument, ii) continuous H2O profiling made with a ground-based lidar, and iii) H2O isotopic composition in liquid water samples acquired in-cloud and at several depths in the Lac d’Annecy.
• Organisation of wash-up meeting of the Lac d’Annecy campaign in Paris (November 2019).
• Definition of a roadmap for publication of the data acquired during this L-WAIVE campaign.
WP5 Components space qualification and sub-systems TRL improvement (SPACETECH)
Main achievements:
• Space compatible wavemeter design developed.
• First wavemeter breadboarding tests conducted to check the critical parameters.
• Detailed analysis of the wavemeter conducted for optimisation.
• Investigation of the space compatibility of the airborne design of the beating detection started.
• Airborne vibration loads analysed and generation of a test spectrum that can be used for vibration testing under airborne conditions.
• Radiation test planning started and test slot reserved for June 2020 for proton testing.
• A preliminary design for a photonic integrated circuit based on silicon nitride (SiN) designed and procured (for more robustness, compactness and radiation hardness required for the airborne instrument).
• Several conference calls held on the topic of a future space DIAL Lidar.
WP6 Communication, Dissemination, Exploitation (L-UP)
Main achievements:
• Project public website developed, communication set finalised (leaflet, poster, LinkedIn page), regular updates on project news released.
• Deliverables achieved and submitted on the EC platform (D6.1 D6.2 D6.3).
• Monitoring of partners’ participation at more than 10 conferences or dissemination events.
• First LEMON Newsletter released and available on the website.
LEMON will result in the TRL improvement of a versatile Lidar system for Earth observation, based on a generic emitter concept, to be able to target several greenhouse gases and water vapour isotopes.
LEMON will provide an added value to meteorological and climate prediction through better localisation and characterisation of carbon sources and sinks.