Nordiska
kommissionen för Geodesi
Nordic
Geodetic Commission
Working Group for Geodynamics
Minutes of the 34th meeting of the Working
Group for
Geodynamics within the Nordic Geodetic Commission
Finnish Geodetic Institute, Masala, March 11-12, 2010
Participants:
Denmark
Gabriel
Strykowski
DTU Space
Emil
Nielsen
DTU
Space
Finland
Mirjam
Bilker-Koivola
FGI
Hannu
Ruotsalainen
FGI
Heikki
Virtanen
FGI
Arttu
Raja-Halli
FGI
Jyri
Näränen
FGI
Ulla
Kallid
FGI
Markku
Poutanen
FGI
(
Norway
Dagny
Lysaker
UMB
Dag
Solheim
Statens
Kartverk
Sweden
Per-Anders
Olsson
Lantmäteriet
Jonas
Ågren
Lantmäteriet
Estonia
Tõnis
Oja
Estonian
Land Board
Andres
Rüdja
Planserk
AS
Harli
Jürgenson
EMÜ,
Germany
Olga Gitlein
IfE, Leibniz
Universität Hannover
Ludger Timmen
IfE, Leibniz Universität
Hannover
Reinhard Falk
BKG, Frankfurt.
1. Opening
Chairman
2. Institute
reports
No
summary is given of the individual institute reports. Most of them will
be
available at the home page of the meeting; (http://holt.oso.chalmers.se/hgs/NKGWG/index.html).
DK:
Danish
National Space Center
(
FI:
Finnish Geodetic Institute, FGI (
NO:
SE 1: Lantmäteriet – The Swedish
mapping, cadastral and land registration
authority (Per-Anders Olsson)
SE
2: Chalmers, Onsala Space
Observatory (
EE:
LT:
DE
: BKG (Reinhard Falk)
3. Presentations
on results from AG observations
Olga
Gitlein:
Comparison of trends from 5 and 15 years
of AG measurements.
Jaakko
Mäkinen: Repeated
absolute gravity measurements in the
Fennoscandian Postglacial Rebound area: comparison of gravity change
with
observed vertical motion and with GIA models. It is agreed that Jaakko
should
proceed with the work to compile a manuscript and submit to Physics and
chemistry of the earth, (special issue from the DynaQlim meeting in
(The
chairman has after the meeting
checked with absent members of the w.g. that this is an acceptable
decision.)
4. Business matters
4.1 Proposal for structure on NKG
and the working group for Geodynamics for the next 4 years period.
Martin
showed some previously accepted documents
concerning the “Vision for NKG”, “Objectives” and “Activities” for the
working
group for Geodynamics.
The meeting
recognized that the work over the last
four years has been carried out very much in agreement with these
formulations
and the proposal from the meeting is that the working group should
continue in
the same form for the next four years period.
Martin
announced that he will not candidate for
chairman of the group for the next period. The working group shall
present one
or a few candidates for chair for the NKG General Assembly in
September. The
following names were suggested by the meeting:
·
·
Miriam
Bilker-Koivula (Miriam did
not want to be a candidate)
·
Gabriel
Strykowski (Gabriel accepted to be a candidate if no one else
was found)
·
Björn
Ragnvald Petersen (Björn
Ragnvald was not at the meeting, but was
afterwards asked by Martin with the result that Björn prefer to pass
the
chairmanship to someone else)
·
Jonas Ågren (accepted
being a candidate)
4.2
Discussion
regarding sharing data from AG
observations.
Martin had
written a draft on “Agreement on exchange
of data from absolute gravity observations” and an extensive discussion
was
held on that. It was a general opinion that the draft was too formal
and strict
and should be formulated more as a “memorandum of understanding”. Some
other
topics discussed during this session were:
·
Which
parties except
the measuring institutions in the Nordic countries should be
comprehended by
this agreement, and how should this be formulated?
·
A definition
(geographical) on which data to be comprehended by this agreement
should be
included.
·
Storage of
raw data should be done as ASCII-files (and
binary files) that can be produced (and reprocessed) by the
“g”-software.
The meeting
did not succeed to come to a final
solution on the formulations and agreed that this draft should be
finalised by
more work and correspondence and acceptance by e-mail, initiated and
led by
Martin.
4.3
Draft for an
updated AG-plan.
Per-Anders
had made a draft of an updated version of the
AG-plan from 2003. It had been distributed to the participants of the
meeting
in beforehand. This plan should be finalised and accepted via e-mail.
Greenland
and
5. Scientific
presentations
No
summary is given of each individual presentation. Access the papers via the links below.
Jaakko
Mäkinen: The Cost Action ES 0701.
Jaakko
Mäkinen:
Repeated relative gravity measurements on
the
Jaakko
Mäkinen: Remeasurement
of the Finnish First Order Gravity
Network with the A10-020 of the IGiK (
Emil
Nielsen: A10
measurements in Greenland and
GWR leaflet introducing iGrav,
a portable superconducting gravimeter. Pricelist as of February, 2010.
6. Next Meeting
The NKG
general assembly will be held in
7. Closing
The WGG
thank their host, the Finnish Geodetic Institute, for excellent
organisation,
service and treatment food-wise.