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Organisation of the Benin AOC ( Cotonou)

Organisation of the Benin AOC ( Cotonou). C. Peugeot/S. Galle : link with TT5, and with AMMA hyperspace. A. Borgstedt : coordination, link with AOC. J.M. Bouchez : tech. coordination. A. Dadé: secretary. Local Operation Centre in Djougou/ tasks during SOP :

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Organisation of the Benin AOC ( Cotonou)

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  1. Organisation of the Benin AOC ( Cotonou) C. Peugeot/S. Galle : link with TT5, and with AMMA hyperspace A. Borgstedt : coordination, link with AOC J.M. Bouchez : tech. coordination A. Dadé: secretary Local Operation Centre in Djougou/ tasks during SOP : Human resources, teams, parnerships with african, Which data to transmit .. tbd, following outcomes of the Leeds meeting

  2. Tasks : upon request, depending on our capabilities • Support / assistance for teams, • Site preparations, support for missions • Design of telecommunication facilities • Credit for SOP operation made available through IRD • (french and EU funds) • Assistance in material shipping, custom clearence

  3. 9.9 Kopargo Bira 9.8 Béléfoungou Nalohou Donga 9.7 Djougou Nangatchori 9.6 1.5 1.6 1.7 1.8 1.9 2 km 0 5 10 15 20 Bénin communication - Djougou Rain recorder Rain bucket limnigraph Automatic piezometer RONSARD Daily piezometer Meteorological station Watershed borders Transect ( fig A1.1) scintillometer radar Disdrometer VAN VHF + UHF VHF + UHF Network : Photometer X X - - Port Port GPS IDAF

  4. Bandwidth needs considered (from PI’s feedback) NO REAL-TIME PROCEDURES !!! RONSARD : 200 ko every 15 minutes, if convection, idle otherwise  800 ko/hour  at most 20 Mo/day NANGATCHORI: NOx-measurements 1,5 Mo/day (compressed data) Ceilometer/MW-Profiler/Micro Rain Radar 0.15 Mo/day (not compressible) UHF 48 Mo/day VHF 12 Mo/day Total 62 Mo/day OTHER SITES : DJOUGOU, PARAKOU(RS), COTONOU-Airport : nothing

  5. RONSARD (Copargo) Equipment : satellite modem R-BGAN, Inmarsat, Bandwidth : 144 kbps, ~50 kbps effective Cost : Modem 550 External antenna + cable 997 Activation+ 1 year subscription 474 2022 Transmission : 6.20 €/Mo Estimate : average of 10 Mb/day x3 months 5580 Total estimated cost (3 months) 7602 € Funded on AOC budget (API) To be checked : attenuation by rainfall !! Related issue : Bi-static : real-time comm. with RONSARD must be funded/installed by DLR team

  6. VHF/UHF facilities and other instruments in Nangatchori Equipment : V-SAT link (LIPTINFOR), Bandwidth : 64/64 kbps, dedicated link recommended Re-use of existing IRD parabola (saves some euros !!) Cost : (euros) Antenna head upgrade + installation 6712 UPS 1KVA 1170 Esquipment sub-total 7882 Dedicated band 64/64 : 991 €/month (recommended) – (Mesh tech.) Shared band (p.m.) 572 €/month 8 months, dedicated link (2006) : 7928 Total estimated cost 15810 € Funded on VHF budget (API) : missing 3800 euros for 2006 !! Facility shared with all other instruments on the site/emissions in turn following priorities To be checked : attenuation by rainfall !!

  7. Djougou (X-Port, GPS) No transmission requests from instruments PI’s BUT : existing INMARSAT link for the GPS station, some IP ports available Equipment : Inmarsat M4 from Thrane & Thrane Probably, activation of this link for the local Operation Center Cost : equipment already funded (API) Transmission costs : 6.80 $/min needed : negociation with GPS PI’s ; under way

  8. Phone communication • To be updated depending on operational needs • (e.g. location of site coordinator, scientific secretary, ..) • Djougou (National+International lines) • phone line (+ fax if needed) at IRD house • phone at X-port site • phone + fax at the hotel (backup solution) • cell phone works well • Nangachori and Copargo : unreliable cell phone network : limit of coverage • 3 INMARSAT satellite phones (2 lent by german IMPETUS project + 1 owned by IRD).

  9. Flow of information (tentative !!) Quick-looks sent to AOC-web site (automated FTP) RONSARD Kopargo Sat./cell phone Sat./cell phone Simplified data sent to Toulouse+AOC-web site (automated FTP) GPS X X - - Port Port Djougou VHF + UHF VHF + UHF Other instr. « Rest of The World » Phone/fax/Internet Nangatchori. Quick-looks/data : sent directly from the sites. Local OC (Djougou ) Collect from sites and transmit to AOC : instr. status ; ground data of interest, Data needed from Parakou and Cotonou ? (under some flight paths, eg. I1.3, I.17)

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