The use of RDT in the HAIC project

Jean-Marc Moisselin

Météo-France, Nowcasting Department

co-authors: Christine Le Bot (Météo-France), Pierre Rieu (Météo-France), Amanda Gounou (Météo-France), Eric Defer (CNRS/LA), Jos De Laat (KNMI)

Overview

1.Introduction

2. RDT in HAIC Campaigns

3. RDT a tool for detecting high IWC

4. Summary and future works

The RDT Tool

Output: convective objects description

Localisation, area, cloud top characteristics, moving,

trends, stage of development, severity, activity ...

RDT= Rapidly Developing Thunderstorm

RDT visualisation

...of OperationFor example by Météo-France for forecasters or aviation end-users

...of SCIENCEconvection features (overshooting tops, convection Yes/No diagnosis, new satellites, HAIC project)

...of Software in the framework of NWCSAF

RDT is a story...

Overview

1. Introduction

2.RDT in HAIC Campaigns

3. RDT a tool for detecting high IWC

4. Summary and future works

■ Ice crystals: cold meteors of very small size (grain of flour). Often non visible through onboard radar.■ Different of classical icing.■ High altitude (>22000 ft), inside or close to convective clouds

■ Impact on probes■ Impact on engines

The high IWC (Ice Water Content) hazard for aviation

HAIC project. Project co-funded by the European Commission within the Seventh Framework Programme (2012-2016). http://www.haic.eu/

During the HAIC flight campaigns: use of RDT in order to detect and track convective systems that could generate conditions of high IWC (Ice Water Content). Uplink of RDT

RDT: a support to HAIC campaigns (1/2)

Courtesy Honeywell

and Atmosphere

company

RDT: a support to HAIC campaigns (2/2)

Enhanced satellite 10.8µm image + convective objects

After the “discrimination” phase of the RDT algorithm

Each object is described with a complete set of attributes

If we want to reduce the information to its kernel

Convective objects outlines alone+ Possibility to reduce the set of

attributes

UPLINK

Ready for uplink

Darwin 2014 -New MTSAT RDT production

- RDT for ground operation

- RDT for post-campaign analysis

Darwin/La Réunion 2016- New Himawari-8 RDT production, existing production for Meteosat 7 and MSG.

- RDT for ground operation

- RDT uplinked

- RDT for post-campaign analysis

Cayenne 2015 - New MSG RDT production, existing production for GOES

- RDT for ground operation (MSG+GOES)

- RDT uplinked

- RDT for post-campaign analysis

RDT in the 2014 2015 and 2016 HAIC campaigns

Darwin 2014 Cayenne 2015 Darwin 2016 La Réunion 2016

SatelliteMTSAT-1R

Freq 10'MSG

Freq 15'Himawari-8

Freq 20'Meteosat 7

Freq 30'

Version RDTv2012

Arpège NWP modelv2013

Arpège NWP modelv2013

Arpège NWP modelv2013

Arpège NWP model

Tropical Forcing No No Yes (-75°C) Yes (-75°C)

TCold -70°C -80°C -75°C -75°C

Channels for RDT (µm)

6.7, 10.86.2 , 7.3 , 8.7, 10.8,

12.0 (and VIS0.6 for OTD)

6.2 , 7.3 , 8.7, 10.8, 12.0 (and VIS0.6 for

OTD)10.7

Other NWCSAF Products Cloud Products

Cloud ProductsCRR Cloud Products

Lightning Network No

Starnet (use for convection

description, not for convection Yes/No

discrimination)

No

ATD (use for convection

description, not for convection Yes/No

discrimination)

Main problems encountered

* missing slots* RDT discrimination scheme not 100% tuned for MTSAT-1R rapidscan

Parallax Edge of SAT domain

RDT algorithm (discrimination scheme) not 100% tuned for Himawari-8

* Only one channel as input, * Frequency 30'

Uplink Only file preparation YES YES YES

Sum-up of RDT configurations for HAIC

RDT in operational environment

• EUMETCAST: satellite reception at MF

• Dedicated blades for job scheduling, NWC SAF PGE, output file and transcoding, data storage. Operated by Satellite Centre of Météo-France (Lannion)

• Production monitoring: execution time, file size, key parameter (number of convective cells over a domain), etc.

Operation Readiness

Overview

1. Introduction

2. RDT in HAIC Campaigns

3.RDT a tool for

detecting high IWC

4. Summary and future works

• Airplane parameters : SAT (Static Air Temperature), TAT (Airplane Temperature) for Darwin 2014, Cayenne 2015, Darwin-La Réunion 2016• Robust probe data (TWC) provided by LAMP (Darwin 2014, Cayenne 2015, Darwin 2016, La Réunion 2016)• IKP (Isokinetic probe) data (TWC) provided by NCAR (Darwin 2014, Cayenne 2015)• RASTA (TWC profile, upward air velocity) provided by LAMP (Darwin 2014, Cayenne 2015)

• DARDAR product. Combination of coincident radar (95 GHz) and lidar (532 & 1064 nm) space-borne A-Train observations sensitive to different properties of the clouds (phase, particle size distribution). Capability to retrieve the vertical distribution of IWC

(a)

(b)

latitude

(c)

(d)

(e)

altit

ude

(km

)

(a)(a)

(b)(b)

latitude

(c)

(d)

(e)

altit

ude

(km

)

(c)

(d)

(e)

altit

ude

(km

)

References for verification

Pairing high IWC and RDT

Four methodologies for pairing

HIGH

LOW

HIGHLOW

Taking into accountformerly-convective cells

Taking into accountold cells

1A 1B 1C

2

The nowcasting potential of RDT regarding IWC hazard

+”blinking” effect

IWC in declassified systems

The reference

Flight 24Good agreement Interest of 2nd level

Subjective evaluation of Flight#24 of Cayenne Campaign

POD of Cayenne Campaignmethods 1A 1B 1C

POD of Cayenne Campaignmethods 1A and 2

20150530

Subjective verification with DARDAR

POD FARnb of flights

Darwin2014 0.84 0.69 16

Cayenne 2015 0.71 0.72 16

Darwin 2016 0.51 0.68 2

La Réunion2016 0.73 0.32 3

DADAR2015 0.38 0.91 21 paths

Sum-up of objective verification

Overview

1. Introduction

2. RDT in HAIC Campaigns

3. RDT a tool for detecting high IWC

4.Summary and future works

RDT as support to HAIC campaign : ground operations and uplink to Research Aircracft for tacitcal use. Definition of new domains helped Météo-France to progress the issue of Global RDT

RDT as a tool for Detection of IWC- post-campaign analysis- TRL5 reached- Mitigation identified for high IWC remaining in declassified system - Day and Night

v2016 NWCSAF delivery : a new attribute concerning IWC hazard estimate (Day only): KNMI algorithm with Météo-France NWCSAF microphysics input

Summary and future works

High Altitude Ice Crystals (HAIC, 314314)

Project co-funded by the European Commission within the Seventh Framework Program (2012-2016)

Thank you