Space Weather in Medium Earth Orbit
description
Transcript of Space Weather in Medium Earth Orbit
![Page 1: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/1.jpg)
ESA UNCLASSIFIED – For Official Use
Space Weather in Medium Earth Orbit
H.D.R. Evans, K. Ryden, P. Nieminen, E. Daly, P. Buehler, W. Hajdas, A. Zadeh
ESWW7, Brugge15/11/2010
![Page 2: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/2.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 2
MEO Orbit
23200km altitudecircular orbit56° inclinationCrosses the Trapped
Electron belt at L=~ 4.5
Giove-A Operational since
end Dec. 2005Giove-B
Operational since
May 2008
IntegralGalileoIntegral (4.5<L<5)
![Page 3: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/3.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 3
Instrumentation
1.Giove-A
a.MERLIN:
3 SURF Plates
RadFETs (3 & 6 mm)
Proton > 40 MeV
Ion/LET detector
b.CEDEX
LET telescope
Experimental Dose rate diodes
2.Giove-B: SREM
Three ORTEC type PIPS diodes, two in coincidence
RadFET
![Page 4: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/4.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 4
Giove-A Merlin SURF Response
K.
Ryden (
Qin
eti
Q),
“M
easu
rem
ents
of
Inte
rnal ch
arg
ing C
urr
ents
in M
EO
: 2
00
5-1
0,
SC
TC
-20
10
, A
lbuquerq
ue,
NM
, U
SA
![Page 5: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/5.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 5
Trapped Electron Belt – GioveA/Merlin
K. Ryden (QinetiQ), “Measurements of Internal charging Currents in MEO: 2005-10, SCTC-2010, Albuquerque, NM, USA
![Page 6: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/6.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 6
Giove-A/MERLIN Spectral Response
K.
Ryden (
Qin
eti
Q),
“M
easu
rem
ents
of
Inte
rnal ch
arg
ing C
urr
ents
in M
EO
: 2
00
5-1
0,
SC
TC
-20
10
, A
lbuquerq
ue,
NM
, U
SA
![Page 7: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/7.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 7
15 July 2008 COSPAR15 July 2008 COSPAR 77
IREM ChannelsIREM Channels
Gre
y =
low
res
pons
e to
ele
ctro
ns
![Page 8: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/8.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 8
Trapped Electron Belt – GioveB/SREM
![Page 9: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/9.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 9
INTEGRAL/IREM from 4.5<L<5.0
![Page 10: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/10.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 10
Giove-B/SREM – RadFET doses
![Page 11: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/11.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 11
Herschel/SREM: Solar Proton Events
![Page 12: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/12.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 12
Solar Proton Events
![Page 13: Space Weather in Medium Earth Orbit](https://reader035.fdocuments.net/reader035/viewer/2022062410/56815864550346895dc5c352/html5/thumbnails/13.jpg)
ESA UNCLASSIFIED – For Official Use
MEO Radiation Environment | H.D.R. Evans | ESWW7, Brugge | 15/11/2010 | TEC-EES | Slide 13
Conclusions
1. The trapped electron environment is very dynamic but has been very
quiet for much of the Giove-B mission, > ½ the dose has been
accumulated in the last 8 Months.
2. The Electron Belt event on the 6th April was a notably strong event in
the 4.5<L<5 range, particularly for the higher energy (>2 MeV)
electrons.
3. Since the April Event, the environment has continued to be active, but
at a lower level than seen during the last period of solar maximum
4. Only a few very small solar proton events have been seen in the last
years, and the results from Herschel & Planck show an anisotropy in
the distribution.
The Sun is starting to increase in activity, but it is still fairly quiet.