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Possibilities For Situating A 1km 2 Array

Possibilities For Situating A 1km 2 Array. Stephen Fegan (UCLA). Lessons From Simulations. Simulations show elevation effect not so large. Can compensate with: Slightly larger dish Higher QE Construction and operation costs grow dramatically with elevation above 3.5km

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Possibilities For Situating A 1km 2 Array

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  1. Possibilities For Situating A 1km2 Array Stephen Fegan(UCLA)

  2. Lessons From Simulations • Simulations show elevation effect not so large. • Can compensate with: • Slightly larger dish • Higher QE • Construction and operation costs grow dramatically with elevation above 3.5km • ALMA: O2 required for all work at 5km • Construction with portable O2 tanks • Control building has O2 plumbing • Consider here viable sites from 3-4km Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  3. Shuttle Radar Topography Mission • NASA / NGA • STS-99, Feb 2000, 11 day on Endeavour • Surface elevation using radar interferometry • Between latitude of -56 and +60 (80% of world) • 1 arcsec horizontal accuracy (30m at equator) • 16m vertical accuracy • Data publicly available from JPL / USGS / GLCF Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  4. SRTM Data Visualization From NASA/JPL http://www2.jpl.nasa.gov/srtm/ Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  5. SRTM Site Search • Search SRTM preliminary data set for • Contiguous circular region • With radius 720m (9×80m / 1.6km2) • At elevation >2500m • Flat to 100m • Ignoring voids in data Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  6. Search Results Elevation Key >2500m>3000m >3500m >4000m >4500m >5000m Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  7. Search Results – Far West Elevation Key >2500m>3000m>3500m >4000m >4500m >5000m Hawaii Mexico Guatemala Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  8. Search Results – Near West Elevation Key >2500m>3000m>3500m >4000m >4500m >5000m Colombia Ecuador Peru Bolivia Chile Argentina Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  9. Search Results – Near East Elevation Key >2500m>3000m>3500m >4000m >4500m >5000m Iran Nepal &China Uganda Ethiopia Congo Kenya Tanzania Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  10. Search Results – Far East Elevation Key >2500m>3000m>3500m >4000m >4500m >5000m China Indonesia (Papua) Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  11. Hawaii NASA Landsat / GLCF / http://landcover.org/ From Yahoo Travel http://travel.yahoo.com/ Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  12. Hawaii – Mauna Loa (Active Volcano) Hawaii – Mauna Loa Distance N-S [km] NASA SRTM and Landsat data from JPL : http://www2.jpl.nasa.gov/srtm/ GLCF : http://landcover.org/ Distance E-W [km] Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  13. Mexico – Mexico City (Metro Region) Mexico – Mexico City Distance N-S [km] NASA SRTM and Landsat data from JPL : http://www2.jpl.nasa.gov/srtm/ GLCF : http://landcover.org/ Distance E-W [km] Possibilities For Situating A Square Kilometer Array Fegan, UCLA

  14. Ecuador Distance N-S [km] NASA SRTM and Landsat data from JPL : http://www2.jpl.nasa.gov/srtm/ GLCF : http://landcover.org/ Distance E-W [km] Possibilities For Situating A Square Kilometer Array Fegan, UCLA

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