IAG/IERS Working Group on Site Survey and Co-location
This Working Group will revise the state of the art of local ties surveying and computation, set guidelines and support on field operations wherever needed. A major scientific challenge is to investigate the sources of the biases stemming from the combinations of technique specific frames and tie vectors estimated with terrestrial observations. This Working Group is joint with IAG. Further details can be found in the 
WG Charter (PDF, 109KB).
Activities
Activities and results of work are described in the following documents.
Chairs
Ryan Hippenstiel
Cornelia Eschelbach (co-chair)
Members
Zuheir Altamimi (IGN, France)
Sten Bergstrand (BIPM, France)
Steven Breidenbach (NOAA/NGS, USA)
Benjamin Erickson (NOAA/NGS, USA)
Cornelia Eschelbach (FRA UAS, Germany)
Charles Geoghegan (NOAA/NGS, USA)
Dionne Hansen (LINZ, New Zealand)
Craig Harrison (GA, Australia)
Ryan Hippenstiel (NOAA/NGS, USA)
Christopher Holst (Technische Universität München, Germany)
Kevin Jordan (NOAA/NGS, USA)
Ulla Kallio (FGI, Finland)
Michael Lösler (Frankfurt Univ. of Applied Sciences, Germany)
Saho Matsumoto (GSI, Japan)
Jack McCubbine (GA, Australia)
Damien Pesce (IGN, France)
Anna Riddell (GA, Australia)
Owen Smallfield (LINZ, New Zealand)
Jerome Saunier (IGN, France)
Elena Martínez Sánchez, (Observatorio de Yebes, Spain)
Daniela Thaller, (BKG, Germany)
Bart Thomas (GA, Australia)
Agnes Weinhuber (Technische Universität München, Germany)
Contacts
Ryan Hippenstiel
NOAA's National Geodetic Survey
1315 East-West Highway
Silver Spring, MD 20910-3282
USA
email: ryan.hippenstiel [at] noaa.gov
