What is EISCAT3D

1
(What is EISCAT-3D?)
Beth ydy EISCAT-3D?

• Derek McKay Ivan Finch, RAL
• MIST 10-13 Ebrill 2006

2
The Project

• Design study only
• EU Framework 6
• No money (yet) for construction
• May 2005, four years duration
• Participants EISCAT, UiT, LTU, RAL
• Still in the early stages

3
Where?

• Four Rx-only sites (Examples shown here)
• One dual-Tx/Rx site (Tromsø)
• N-S and E-W lines
• Uniform spacing
• 150 and300 km

4
Transmitter site

• Single Transmitted beam from Tromsø
• Transmit frequency 215 MHz
• Pulse-coding (same as now)
• VHF (with phase control) as the possible test
  bed for the transmitter, or even the final
  transmitter
• Tromsø will act as central control/archive

5
Receiver sites

• Remotely operated no local staff!
• Receiver frequency range 200-230 MHz(wide
  enough to see plasma lines)
• Phased arrays
• 1500 elements each
• 3000m2 collecting areas (approx. 35m dish)
• sloped sites
• IPS not possible due to 30 off-bore limitation

6
Receiver sites

• 5-10 electronically steered beams per site
• Near and far receiver sites (150, 300km),
  selected for the sky view
• near sites are too close for good tri-statics
  at high altitudes
• far sites cant see low altitude
• Note that Tx site also has receive ability

7
Interferometry

• Tromsø will have interferometric capability
• 7 small elements
• Coherence threshhold driven observing

8
What do we get

• Multiple beams, therefore multiple tri-static
  measurements along the Tx beam
• One Rx-beam reserved for continual calibration
• 30km to 2000km altitudes
• Range resolution down to 30m
• You get the current package of analysed data
  params Ne, Ti, Te, n, comp, vi

9
Plans

• Design work in progress
• Questionnaire sent out
• Second call for user community input mid-2006
• At the conclusion of the design study, a proposal
  for construction will be made
• Will lead to a FP7 bid

10
Work Packages