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Antarctic International Magnetometer Network (AIMNet)

Antarctic International Magnetometer Network (AIMNet). Mervyn Freeman British Antarctic Survey Cambridge, U.K. What is AIMNet?. Coordinated international network of new and existing magnetometers in Antarctica.

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Antarctic International Magnetometer Network (AIMNet)

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  1. Antarctic International Magnetometer Network (AIMNet) Mervyn Freeman British Antarctic Survey Cambridge, U.K.

  2. What is AIMNet? • Coordinated international network of new and existing magnetometers in Antarctica. • Based on integration of existing national resources and modest innovative national expansions. • Gives recognised international identity that provides leverage for new initiatives. • Forum for development of new technology for science in remote environments. • All data available to world community through one web address hosted by BAS. • Complete database copied on CD/DVD to all AIMNet partners. • Whole is greater than sum of parts.

  3. Why Now? • International Polar Year 2007 provides natural focus for international Antarctic cooperation. • New research programmes demand integrated approach • ILWS: connects Sun and Earth • ICESTAR: connects northern and southern hemispheres • Themis: connects magnetosphere and ionosphere • SuperDARN: integrates ionospheric convection • New low power magnetometer technology now available • proven in field • easy to deploy and low maintenance cost • minimal environmental footprint

  4. The AIMNet vision • Enhance existing Antarctic magnetometer base through coordination: • ~20 mag’s at national bases • 6 US AGO mag’s in field • 11 UK and 4 Japanese low power mag’s in field • Deploy new LPM clusters within 500 km of national stations/sites • e.g., Italian proposal for 6 LPMs • What if others did same? • LPMs available from BAS under contract (~$20k/unit) • Individual mag’s owned and operated by individual nations with full autonomy • All data accessible through BAS virtual hub.

  5. Linkage to SuperDARN Key: yellow - deployed brown – planned green - proposed • Comprehensive measurement of high-latitude ionospheric electrodynamics.

  6. LPM specification • Up to 1 nT, 1 s resolution. • GPS timing. • Automatic continual operation between annual data collection visits. • 80-100% coverage. • Low power consumption • 0.5 W from batteries charged by solar array and wind generator. • 150 ms sample every 1 s • Operation at ambient temperature (-80oC min) • Light weight, easy to deploy from ski-equipped plane in 2 hours.

  7. Correlation analysis of AGO A80 and co-located LPM M81-338 LPM performance • 100% data coverage in 2003 from 11 LPMs at 1 s resolution (3564 data days) • Performance checked against co-located AGO magnetometers.

  8. Summary • AIMNet: Coordinated international network of new and existing magnetometers in Antarctica. • Integrates existing magnetometer base. • Extends autonomous magnetometer networks • LPM clusters deployed by host nations within 500 km of bases. • New mag’s built to proven BAS LPM design under contract. • Deploy for IPY 2007. • All data available through one web address hosted by BAS. • Connects to new integrated science programmes. • Whole is greater than sum of parts.

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