Drifting Buoy Update: WOTAN and Iridium METOCEAN Data Systems Limited October 9, 2003 Drifting Buoy Update: WOTAN and Iridium Bernie Petolas, P.Eng. Product Manager, Buoys and Platforms Tony Chedrawy, MBA, P.Eng. VP Sales and Marketing Iridium Drifter BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN SVP BP WSD DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Introduction WOTAN Buoy History and Development WOTAN Buoy Design and Specifications WOTAN Buoy Performance Conclusion DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Buoy History WOTAN – Wind Observation Through Ambient Noise METOCEAN’s electronics, hydrophone and pre-amplifier design developed in 1988 Drifting buoy design integration in 1992 Vagle Algorithm focusing on sound intensity levels between 2 kHz and 8 kHz DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Development Full sensor suite and data processing integrated to METOCEAN SVP drifters in 1996 Incorporation of Pierre Blouch’s algorithm in 2003. Average sound intensity level between 2 kHz and at 6 kHz, standard deviation between 2 kHz and at 8 kHz Transmission of data across the full sound spectrum Over 400 WOTAN drifters deployed !! DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Design METOCEAN WOTAN DRIFTER 16 inch diameter hull Argos position SST - Sea surface temperature BP - Barometric Pressure Drogue On/Off Sensor Acoustic wind speed Internal compass and wind vane for direction Drogues - 644 cm by 92 cm centered at 15 meters Argos M1 or M2 Data Transmit Format DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Design Barometer port Drifter hull Fixed vane Hydrophone 10 metres below the sea surface Drogue DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Performance Year Number Minimum Maximum F.O.D Average 2000 84 124 days 582 days 2 388 days 2001 134 94 days 631 days 6 419 days 2002 128 32 days 608 days 4 407 days Data courtesy of NOAA, UK Met Office, Meteo France, AOML, NDBC, NAVOCEANO, KORDI, Environment Canada, Australian Bureau of Meteorology DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Performance DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Performance DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Performance DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Performance DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 WOTAN Conclusion Minimum lifetime of one year Proven Air Deployment Reliability Proven Performance in Hurricane (s) Low POWER Consumption DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Iridium DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Iridium Introduction Iridium data services overview METOCEAN’s Iridium Communication Infrastructure Drifting buoy deployed in Bering Sea Iridium costs Conclusions DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Overview of Iridium System DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

DBCP Technical Workshop 2003 SBD Service Overview Internet Email Iridium Gateway Value Added Reseller Host System SBD Network Equipment End User Applications DBCP Technical Workshop 2003

DBCP Technical Workshop 2003 SBD Service Overview An efficient packet-based service for frequent short data transmissions Service supports 1960 bytes Mobile Originated and 1890 bytes Mobile Terminated System interfaces: Device: Extended AT command set Gateway: Email - user data is sent in attachments Pricing plans based on byte usage not time DBCP Technical Workshop 2003

METOCEAN Data Systems Limited October 9, 2003 METOCEAN’s Iridium Communication Infrastructure Based on METOCEAN iLink™ Server Server monitors a port for incoming packets from Iridium buoys Accepts simultaneous connections from multiple platforms In effect, each buoy has a direct connection to the database via the Internet DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Message Processing Each buoy maintains a queue of hourly reports, transmitted upon connection to the server An acknowledgement is sent back only if the data is successfully stored in the database Upon acknowledgement, the buoy deletes the message from its transmission queue If the message queue is full, the oldest message is deleted Programmable parameters allow flexibility in message throughput, data loss prevention and delivery costs DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Command Processing Provided by an outgoing message queue in the database User submits commands via web page When connected, the buoy sends periodic command request packets and an acknowledgement after a command is received and executed Commands are stored in the database All buoy commands can be executed via the Iridium interface Very powerful but dangerous tool! DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Drifting Buoy Deployment Hourly data acquisition Barometer, SST and Submergence Sensors GPS positioning Bi-directional communications using the Iridium Satellite Network Customer Command/Data Interface (WWW) Enhanced METOCEAN Digital Controller Modular TMOS Software Architecture DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Deployment in Bering Sea NDBC Buoy 46001 DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

DBCP Technical Workshop 2003 Buoy Data DBCP Technical Workshop 2003

METOCEAN Data Systems Limited October 9, 2003 Cost Comparison (US$) Telemetry Costs Iridium PPP SBD Monthly Service Rate $30 $21 Daily rate $3.96 $2.20 Total Tx costs for one year $1,805 $1,055 Number of messages per day 2 24 Bytes transmitted per message 192 32 DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Iridium Conclusion Two-way communications and large bandwidth produce power savings Iridium message throughput is about 80% Our database management system is 100% Allows reconfiguration after deployment Potential cost savings of 33% over other satellite systems METOCEAN can offer data services DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium

METOCEAN Data Systems Limited October 9, 2003 Thank You ! DBCP Technical Workshop 2003 BIO Technical Presentation on Iridium