Requirements for meteor and dust studies with the new

EISCAT_3D facility

Asta Pellinen-Wannberg

Umeå Universityand

Swedish Institute of Space Physics

EISCAT_3D User Meeting, April 19-21, 2010, Uppsala, Sweden

ESFRI Roadmap and the FP7 Preparatory Phase

• FP7 Preparatory Phase follows quite automatically the acceptance into the ESFRI Roadmap

• EISCAT_3D was a special case – Not a completely new science instrument– A new radar instead of another for which the

bandwidth was lost due to EU decision somewhere else

• How do we keep up the science interest for 5-10 more years, before we have a new radar?

6

SN

R (

dB

)

2

10

E

S

Z

A meteor passing the Tromso radar beam:

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.120

2

4

Kir

SN

R( V

Kir = 6.2 km/s, V

Sod = 20.1 km/s, V

Tro = -11.8 km/s ) | V | = 33.4 km/s

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.120

10

20

So

d S

NR

0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.120

5

10

Tro

SN

R

Time (s)

Interference in the echoes from two separating fragments:

Orbits of 194 solar system dust particles observed during 24 hours around the autumnal equinox 2005

Csilla’s resonanser

Possible new sites

Possible new baseline

Transmitter site

69.4 N 30.0 E

69.58 N 19.22 E

68.2 N 14.3 E

~67 N

EISCAT_3D FP6 Design StudySite location suggestions

Swedishinfrastructureproposal2009

69.4 N 30.0 E

69.58 N 19.22 E

68.2 N 14.3 E

EISCAT_3D?

The Atmosphere

ozonelayer

waveswinds

100

80

60

40

20

0

noctilucent clouds

tropopause

stratopause

mesosphere

stratosphere

troposphere

100 300

temperature (K)

waves

winds

stratospheric clouds

mountain leewaves

magneticfield

mesopause

600

aurora

air - Earth current

PMSE

69.4 N 30.0 E

69.58 N 19.22 E

68.2 N 14.3 E

FutureEISCAT_3Dfor meteor studies

Requirements for meteor and dust studies with the new

EISCAT_3D facility

• Multistatic observations unique and essential

• Make the new geometry ultimate with receiver stations on two circles (low and high altitude) around the transmitter, three on each circle located 120° from each others

• User friendly

69.4 N 30.0 E

69.58 N 19.22 E

68.2 N 14.3 E

Or futureEISCAT_3Dfor meteor studies

Problems to solve• Fill the new VHF frequency (233 MHz) fast!• Concern for the escape/retirement of scientific and

technical experts• Positions for post postdocs?• The geometry for the tristatic EISCAT UHF was

never perfect, it was based on– Need of supporting infra structure in the late 70’s – Political, sites in each Nordic country

• Today we have the technology to build unmanned stations whereever we get a location– Make the most optimal scientifically justified geometry – Do not go for pet solutions