Installation and Setting Up of GLOSS OTT Radar Tide Gauges with DCP Telemetry for ODINAFRICA and Future Developments Peter Foden and Jeff Pugh UNESCO/IOC Oostende 2006
ODINAFRICA - Ocean Data and Information for Africa Current, In Progress and Proposed GLOSS Tide Gauges
OTT Tide Gauge – Kit of Parts
Main Sea Level Sensors – Radar and Pressure
ODINAFRICA - Meteosat DCP Tide Gauge
The Component Parts of the OTT Gauge
OTT Logosens2 – Data Logger
OTT DCP/HDR Transmitter - Connections
OTT Power Supply – PCU 12
Kalesto Radar Sensor Connections
Pressure Sensor - Cable Connections
Radar Sensor Support Arm Designs
Simplified Radar Support Arm Design
Pressure Sensor mounting support bracket example: - Needed to keep the Sensors in a stable and repeatable datum positions
The Proposed Tide Gauge Sites
Proposed OTT TG site – Karachi, Pakistan
Proposed TG site – Nouakchott, Mauritania
Tide Gauge Hut, Takoradi, Ghana – Proposed site for OTT Radar Gauge
Proposed OTT TG site – Port Sonara, Limbe, Cameroon
Proposed new OTT TG Site – Pointe Noire, Congo
Summary of TG Site requirements A weather proof tide gauge hut for electronics 24 hour security Electricity and if possible Telephone Tools for installation (I have a list) A mounting arm for the radar gauge Mountings for the pressure sensors (one below low tide and one at approximately MSL) A pole for antennas A simple stilling well for calibration checks Regular Dipper and Tide Staff Measurements…
Staff Gauges and Dippers – Regular Checks Available in 1 metre lengths that can be joined Plastic or metal, graduated in centimetres Dipper gives audio and visual indication of height from a reference point to Sea Level
Antenna Alignment and Data Checking
Antenna Pointing Utility – Eumetsat Website
DCP Data Checking and Download – Eumetsat Webpage
ODINAFRICA Telemetry issues Meteosat DCP is low cost and conforms to standards of Pacific TWS. Automatic data flow to GTS. Limited bandwidth, cannot report faster than every 15 minutes. The new minimum recommended data reporting rate is every 6 minutes. Alternative to DCP is required for tsunami monitoring and faster data delivery – BGAN Broadband and SMS
BGAN Terminals True Global Wi-Fi Data rate up to 492 kb/s Data messages by SMS or Internet
Liverpool BGAN Tide Gauge
BGAN Pricing – Standard Economy Rate BGAN Terminal$2800 Activation charge$35 Monthly subscription$49 IP Data rate/Mb$8.23 Static IP/Month$30 SMS per Message$ Mb/Month of data$120.15
Summary For the first time high speed, low-cost real- time data telemetry from remote areas is possible using BGAN, addressing the poor latency issues of earlier telemetry systems Number of technical issues for BGAN: Long term reliability, Up time, Latency of SMS messages and interfacing to the GTS Adoption of broadband will have implications for IT infrastructures. In particular the high volume of data produced, how to store it and keep it secure
Possible Tsunami Monitoring System using BGAN Data Telemetry and SMS
ODINAFRICA – Ocean Data and Information for Africa
New development - BGAN True global Wi-Fi Data rate of up to 492 kb/s Suitable for Tsunami monitoring Portable and will work outside UK