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MidHeliospheric Great Observatory MiHeGO
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At the same time, the two STEREO spacecraft will move ... solar wind transients using the fortuitous alignment of Ulysses, WIND, ACE and STEREO. ... – PowerPoint PPT presentation
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Title: MidHeliospheric Great Observatory MiHeGO
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Mid-Heliospheric Great Observatory (MiHeGO)
Opportunity
- Between April and November, 2007 Ulysses will
execute a fast latitude scan that will bring it
within 0.4 AUs of Earth. - At the same time, the two STEREO spacecraft will
move away from Earth from 0.3 to 0.7 AUs in the
ecliptic. - With WIND and ACE at the Earths L1 point, the
five spacecraft will form a unique 0.5-1 AU
tetrahedron ideal for the separation of time
and space variations and for the determination
of the large-scale geometry of solar wind
structures.
Measurement Strategy
- Treat the 5 spacecraft as a single great
observatory by employing common metadata
standards and developing data analysis
techniques that make full advantage of the
unique formation. - Triangulation of IP shocks with radio
instrumentation from Ulysses, WIND and the two
STEREO spacecraft.
Science Objectives
- Determine the 3D geometry and internal
structure of ICMEs/magnetic clouds and
interplanetary shocks at 1 AU. - Determine the longitudinal and latitudinal
extent of energetic particle storms at 1 AU. - Determine the 3D shape of interplanetary shocks
in the inner heliosphere using radio
triangulation. - Determine the structure of the ambient solar
wind on the 0.5-1 AU scale.
Technology Development
- No new technologies required.
- Spacecraft operations, command and control to
remain in individual spacecraft control and
funding. - Calling for dedicated science proposal
opportunity for peer-reviewed grants that take
advantage the unique spacecraft constellation.
Contact Info Adam Szabo, NASA/GSFC
Adam.Szabo_at_nasa.gov
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Mid-Heliospheric Great Observatory (MiHeGO)
MiHeGO will determine the 1 AU distribution of
energetic particles and the large scale structure
of geo-effectivesolar wind transients using the
fortuitous alignment of Ulysses, WIND, ACE and
STEREO.
Relation to Exploration
- MiHeGO will determine the radiation environment
in interplanetary space near 1 AU thus providing
empirical design limits for future
interplanetary exploration. - MiHeGO will determine the large scale structure
of interplanetary transients at 1 AU providing
necessary information to improve current space
weather warning algorithms.
Relation to SSSC and SESD
- By establishing the 1 AU characteristics of the
interplanetary radiation environment and
transient geometry, MiHeGo will allow the
refinement of LWS Sentinels inner heliospheric
science objectives. - MiHeGO will coexist with current solar remote
sensing missions (SOHO, TRACE, Solar-B, RHESSI)
enabling the study of connection between solar
phenomena and 1 AU solar wind transients, a key
objective of SSSC.
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