Preliminary Announcement

The L5 consortium is an informal group of scientists that has been promoting science missions to Sun-Earth L5 since 2010. The most recent meeting was held in Boulder, CO in December 2014. The scientific potential was demonstrated by the Solar Terrestrial Relations Observatory (STEREO) when it was in quadrature with SOHO during 2010-2012. After a two-year hiatus, the Consortium meeting will again be held this year during October 17-20, 2017 at the Max Planck Institute for Solar System Research, Göttingen, Germany. The goal of L5 Consortium meetings has been to address open questions in heliophysics using future missions from L5 and L4.

Deploying a mission at Sun-Earth L5 has several key benefits for heliophysics, especially on magnetic structures inside and outside the solar surface. The benefits and measurements include: (1) magnetograms obtained from L5 can improve the surface magnetic field distribution used as input to MHD models that predict the background solar wind and, together with helioseismology, allow us to study the evolution of active regions for longer periods of time, (2) helioseismology from Sun-Earth line and L5 views will improve the coverage of the surface and thereby improve our ability to study the solar interior as well as allow us to perform stereoscopic seismology in the overlap region, (3) viewing CMEs off the Sun-Earth line appears to be critical in observing Earth-arriving parts of the CME, (4) L5 coronagraphic and wide-field observations may provide better estimates of near-Sun and propagating true speed of CME, which is an important input to models that forecast Earth-arrival times of CMEs, (5) backside and frontside CMEs can be readily distinguished even without locating the coronal source, (6) preceding CMEs in the path of Earth-affecting CMEs can be identified for a better estimate of the travel time, (7) a combination of EUV, coronagraph, and heliospheric imaging an track CME-shock complex from the Sun all the way to 1-AU for shock/flux rope evolution studies, (8) CIRs reach the L5 point a few days before they arrive at Earth, and hence provide significant lead time before CIR arrival, (9) L5 observations can provide advance knowledge of CME and CIR source regions (coronal holes) rotating to Earth view, (10) Energetic particle detection at multiple locations (L5 in combination with L1 and/or L4) is essential in gaining insight into the widespread nature of SEP events, especially in the energy range 300 MeV - 2 GeV that was not measured by STEREO.

The L5 consortium meeting at Max-Planck will involve discussion on the science and potential missions to L5 and L4.

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L5 consortium consists of a group of scientists interested in developing mission concepts and instruments that can eventually be placed at Sun-Earth L5 to study heliophysics.


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REGISTRATIONN IS NOW CLOSED. Please contact Nat if you have questions.

Abstract submission is now closed.

Click here to see a list of the registered participants. (opens in a separate tab)

Submitted abstracts are available in the order of the Meeting Agenda. (opens in a separate tab)

The registration fee (€ 200) can be paid in cash at the meeting site (preferred). Bank transfers may also be accepted. The cost of registration includes catered lunches for the duration of the conference, two coffee breaks per day with light refreshments and the Conference Dinner.

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An up to date agenda is available here (opens in a separate tab).

Prior to the L5 Consortium Meeting, there is a one-day splinter meeting on Coordination of Synoptic Observations.

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You may find the following publications helpful:

Akioka et al. 2005, AdvSpcRes: The L5 mission for space weather forecasting

Simunac et al. 2009, Sol Phys: In situ observations of solar wind stream interface evolution

Webb et al. 2010, Space Research Today: Using STEREO-B as an L5 space weather pathfinder mission

Gopalswamy et al. November 2010, EASCO white paper submitted to the Solar and Space Physics Decadal Survey

Vourlidas et al. 2010, Decadal Survery White Paper: Mission to the Sun-Earth L5 Lagrangian Point: an optimal platform for Heliophysics & space weather research

Gopalswamy et al. 2011, SPIE: Eath-Affecting Solar Causes Observatory (EASCO): a mission at the Sun-Earth L5

Gopalswamy et al. 2011, J Atm. Sol. Terr. Phys,: Earth-Affecting Solar Causes Observatory (EASCO): a potential international Liwing with a Star Mission from Sun-Earth L5

Turner and Li 2011, Spc. Weath.: Using spacecraft measurements ahead of Earth in the Parker spiral to improve terrestrial space weather forecasts

Gopalswamy et al. 2013, Spc Weath.: Testing the empirical shock arrival model using quadrature observations

Posner et al. 2014, Spc Weath.: The main pillar: assessment of space weather observational asset performance supporting nowcasting, forecasting, and research to operations

Vourlidas 2015, Spc Weath.: Mission to the Sun-Earth L5 Lagrangian Point: An Optimal Platform for Space Weather Research

Pevtsov et al. 2015, AdSpr: Effect of uncertainties in solar synoptic magnetic flux maps in modeling of solar wind

Mackay et al. 2016, ApJ: Impact of an L5 Magnetograph on Nonpotential Solar Global Magnetic Field Modeling

Pevtsov et al. 2016, Spc Weath.: What if we had a magnetograph at Lagrangian L5?

Lavraud et al. 2016, JASTP: A small mission concept to the Sun-Earth Lagrangian L5 point for innovative solar, heliospheric and space weather science

Presentations from the 2015 meeting held in England can be found here.

Please send us relevant publications to include in this list.

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Max Planck Institute for Solar System Research
Justus-von-Liebig-Weg 3
37077 Göttingen, Germany

Local Airports

Hannover Airport (HAJ) (the best option) :

  • ~ 139 km from the meeting location
  • ~ 1 hour by train

Frankfurt Airport (FRA) (the second best option) :

  • ~ 242 km from the meeting location
  • ~ 2 hour by train

A few other airports (less convenient) :

  • Hamburg Airport (HAM): ~289 km
  • Berlin Tegel Airport (TXL): ~334 km
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By Car (via Autobahn)

By Train

From the Airports

    A7 from north or south:

  • Take exit 72-Göttingen-Nord toward Göttingen-Holtensen/ Göttingen-Weende/ Braunlage/ B27
  • Slight right toward B3 (signs for B27/ A7/ Hannover/ Göttingen/ Bovenden/ Duderstadt); Continue straight onto B3
  • Slight left onto An der Lutter/ B27
  • Take the exit toward Kliniken
  • Keep left, follow signs for Univ.-Nordbereich/ Polizei
  • Turn left onto Robert-Koch-Straße
  • Turn right onto Hans-Adolf-Krebs-Weg
  • Continue onto Justus-von-Liebig-Weg 3

  • B27 from east:

  • Take B27/ B446 toward Uslar/ Göttingen/ Hannover-Kassel; continue to follow B27
  • Turn right onto Am Faßberg
  • Turn left onto Otto-Hahn-Straße
  • Turn left toward Hans-Adolf-Krebs-Weg
  • Continue straight onto Hans-Adolf-Krebs-Weg
  • Turn left onto Justus-von-Liebig-Weg 3

  • ICE (Inter City Express) to Göttingen
  • For reservations visit the Travel Service of the Deutsche Bahn (the link opens in a new tab)
  • From the station you can take the buslines 21/23 towards Nikolausberg (or Uni-Nord or Faßberg). Exit at busstop Kellnerweg (~100 m to MPS)

    Note that the busses also go by the Best Western hotel.

  • Alternatively, from the station you can take the busline 23 towards Faßberg. Exit at busstop Kellnerweg (~100 m to MPS)

  • We encourage you to check the Deutsche Banh website linked above and search for trains from "Hannover Flughafen" or "Frankfurt(M)Flughafen" to "Göttingen" or "Kellnerweg, Göttingen"

    From Hannover airport:

  • Take S-Bahn from the airport to Hannover main station
  • Take the Inter City Express (ICE) or IC to Göttingen
  • Follow the directions to travel by train, as shown in the left

  • From Frankfurt airport:

  • Non-stop trains to Göttingen run every two hours from Fernbahnhof
  • OR Take S-bahn from "Regionalbahnhof" (platforms 1-3) to Frankfurt main station. Then change train towards Göttingen. Otherwise you can also take ICE from Frnkfurt main station towards Kassel/ Hamburg.
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We have negotiated discounted prices at a few nearby hotels:

Best Western Am Papenberg (the link opens in a new tab): We have reserved 25 rooms. This is close to the meeting venue with easy bus route to the city center.

Hotel Stadt Hannover (the link opens in a new tab): We have reserved 15 rooms. This is at the city center with easy bus route to the meeting venue.

A list of nearby hotels and their negotiated rates can be found here (opens in a new tab).

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There are a few options near the meeting venue and several in the city center.

Lunch will be provided at the meeting venue from October 17 through October 19.

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Science Organizing Committee

Local Organizing Committee

Jesper Schou (co-chair)
Max-Planck Insititute for Solar System Research
Phone: +49-551-384-979-161
Cell Phone: +49-175-975-4391

Nat Gopalswamy (co-chair)
NASA Goddard Space Flight Center
Phone: +1-301-286-5885
Fax: +1-301-286-1433

Andreas Lagg

Chi Wang

Louise Harra

S.P. Rajaguru

Benoit Lavraud

David Berghmans

Craig Deforest

Milan Maksimovic

Bernd Heber

Robert MacDowall

Andreas Lagg (chair)
Phone: +49-551-384-979-465

Jesper Schou
Phone: +49-551-384-979-161

Sibylla Siebert-Rust (secretary)
Phone: +49-551-384-979-424

For questions regarding conference registration and this website: please contact, Phone:+1-301-286-8312.