GLACSWEB Kirk Martinez, Jane K. Hart, Royan Ong & Joseph Stefanov, University of Southampton; Ian Marshall & David Robinson,BTExact; Ian Marshall & David Robinson, BTExact; Nathan Boyd and John Argirakis, InteliSYS

Aims and Objectives To monitor glacier dynamics as a contribution to the study of ‘Global Warming’ To develop a pervasive sensor network reusable, self-configuring, cheap robust communications adaptive behaviour extensible ad-hoc networking for new sensors low power To produce generic components and expertise useful in other environments

GLACSWEB Pervasive computing Supraglacial data Subglacial data

System overview

Preliminary Results from Briksdalsbreen in 2003 Field results Sensor network

map

Understanding the Subglacial Environment Ground Penetrating Radar Drilling & till sampling Borehole camera

Drilling and Till Sampling A hot-water drill made our holes – right down to 80m deep. Other tools allowed investigation of the material at the bottom

Ice hole depth 10m0 N Ice flow 72m Water drained 70m 76m 80m Water filled 55m 65m 82m 56m 62m 63m 75m>38m

Design, construction and final testing of the Probes

Probes Plastic case (10cm long) PIC microcontroller Radio Transceiver (868MHz) A/D and amplifiers Batteries Sensors: tilt, temp, pressure Real time clock

Probe subsystems

Probe pressure tests in Oceanography

PCBs

Base station Measure snow levels, temp, box tilt, bat V Radio links to Ref station and probes DGPS Large power supply and solar panel

Base Station

Reference station Small Linux server ISDN line Backup of all data Gets all DGPS data Deposits data on Southampton server

Reference Station ISDN link to internet

HoursProbeBase StationReference Station 0000Data logging Data logging Data logging Data loggingGPS logging 1600Communication Data transfer 2000Data logging-- System Timeline System on times:Data logging- 11 seconds GPS logging- 20 minutes Communication- 180, 300, 600 seconds (PR, BS, RS) Data transfer- when completed

Summary Characterised depth and nature of the bed Designed, built, tested and deployed 9 probes Set up Base Station and Reference station ISDN link for the reference station was set up SMS receiver was set up in Southampton

Future development Smaller probe electronics Lower frequency probe communications Probe positioning system –Investigate chirps and pulses Web site data plots

David Robinson, Daniel Miles, Jane Hart, Kirk Martinez, Sue Way & Royan Ong