7 research outputs found
The NKG2008 GPS campaign - final transformation results and a new common Nordic reference frame
Abstract
The NKG 2008 GPS campaign was carried out
in September 28 – October 4, 2008. The purpose was
to establish a common reference frame in the Nordic-
Baltic-Arctic region, and to improve and update the transformations
from the latest global ITRF reference frame
to the national ETRS89 realizations of the Nordic/Baltic
countries. Postglacial rebound in the Fennoscandian area
causes intraplate deformations up to about 10 mm/yr to
the Eurasian tectonic plate which need to be taken into account
in order to reach centimetre level accuracies in the
transformations.
We discuss some possible alternatives and present the
most applicable transformation strategy. The selected
transformation utilizes the de facto transformation recommended
by the EUREF but includes additional intraplate
corrections and a new common Nordic-Baltic reference
frame to serve the requirements of the Nordic/Baltic countries.
To correct for the intraplate deformations in the
Nordic-Baltic areawe have used the commonNordic deformation
model NKG RF03vel. The new common reference
frame, NKG ETRF00, was aligned to ETRF2000 at epoch
2000.0 in order to be close to the national ETRS89 realizations
and to coincide with the land uplift epoch of the national
height systems. We present here the realization of
the NKG ETRF00 and transformation formulae together
with the parameters to transform from global ITRF coordinates
to Nordic/Baltic realizations of the ETRS89.</jats:p
Regional integration of long-term national dense GNSS network solutions
The EUREF Permanent Network Densification is a collaborative effort of 26 European GNSS analysis centers providing series of daily or weekly station position estimates of dense national and regional GNSS networks, in order to combine them into one homogenized set of station positions and velocities. During the combination, the station meta-data, including station names, DOMES numbers, and position offset definitions were carefully homogenized, position outliers were efficiently eliminated, and the results were cross-checked for any remaining inconsistencies. The results cover the period from March 1999 to January 2017 (GPS week 1000-1933) and include 31 networks with positions and velocities for 3192 stations, well covering Europe. The positions and velocities are expressed in ITRF2014 and ETRF2014 reference frames based on the Minimum Constraint approach using a selected set of ITRF2014 reference stations. The position alignment with the ITRF2014 is at the level of 1.5, 1.2, and 3.2 mm RMS for the East, North, Up components, respectively, while the velocity RMS values are 0.17, 0.14, and 0.38 mm/year for the East, North, and Up components, respectively. The high quality of the combined solution is also reflected by the 1.1, 1.1, and 3.5 mm weighted RMS values for the East, North, and Up components, respectively
Regional integration of long-term national dense GNSS network solutions
The EUREF Permanent Network Densification is a collaborative effort of 26 European GNSS analysis centers providing series of daily or weekly station position estimates of dense national and regional GNSS networks, in order to combine them into one homogenized set of station positions and velocities. During the combination, the station meta-data, including station names, DOMES numbers, and position offset definitions were carefully homogenized, position outliers were efficiently eliminated, and the results were cross-checked for any remaining inconsistencies. The results cover the period from March 1999 to January 2017 (GPS week 1000-1933) and include 31 networks with positions and velocities for 3192 stations, well covering Europe. The positions and velocities are expressed in ITRF2014 and ETRF2014 reference frames based on the Minimum Constraint approach using a selected set of ITRF2014 reference stations. The position alignment with the ITRF2014 is at the level of 1.5, 1.2, and 3.2\ua0mm RMS for the East, North, Up components, respectively, while the velocity RMS values are 0.17, 0.14, and 0.38\ua0mm/year for the East, North, and Up components, respectively. The high quality of the combined solution is also reflected by the 1.1, 1.1, and 3.5\ua0mm weighted RMS values for the East, North, and Up components, respectively
The NKG2008 GPS campaign – final transformation results and a new common Nordic reference frame
The NKG 2008 GPS campaign was carried out
in September 28 – October 4, 2008. The purpose was
to establish a common reference frame in the Nordic-
Baltic-Arctic region, and to improve and update the transformations
from the latest global ITRF reference frame
to the national ETRS89 realizations of the Nordic/Baltic
countries. Postglacial rebound in the Fennoscandian area
causes intraplate deformations up to about 10 mm/yr to
the Eurasian tectonic plate which need to be taken into account
in order to reach centimetre level accuracies in the
transformations