Session 1: Establishment of the IGRF from national perspectives
Chairs: A. Engfeldt (Sweden) / P. Dykowski (Poland)
In order to make the IGRF accessible, a compatible infrastructure is required. The status of national gravity networks, site selection and classification and regional coordination in one focus. National reports on gravity networks are welcome. Further topics are the maintenance of stations and networks and accounting for long-term gravity changes.
Session 2: Standards in Absolute Gravimetry
Chairs: A. Germak (Italy) / S. Svitlov (Germany)
Absolute gravity observations contributing to the IGRF need to be traceable to the SI. The session with focus on classical ballistic absolute gravimeters is dedicated to practical aspects of the calibration of frequency standards and correction for systematic effects, e.g. diffraction, self-attraction, fringe distortion or verticality, from a user’s perspective. Quality management and the role of Metrology are further important topics.
Session 3: Monitoring of Absolute Gravimeters
Chairs: V. Pálinkáš (Czech Republic) / R. Falk (Germany)
Comparisons of absolute gravimeters are an essential part of the IGRF to demonstrate compatibility of the instruments. Reference stations are providing long-term monitoring of gravity variations and by this allowing to assess information on the stability of gravimeters. Contributions and discussion on monitoring of absolute gravimeters through comparisons or observations at reference stations are welcome.
Session 4: Best practices
Chairs: D. van Westrum (USA) / M. Bilker-Koivula (Finland)
The successful implementation of the IGRF requires the establishment of widely accepted best practices in absolute gravimetry. This session focuses on the operation of common instruments and the processing of absolute gravity observations, including, for example, discussions of the effective position on the free-fall trajectory, and the measurement of vertical gravity gradients. Data preparation and submission to the AGrav database from practical perspective will also be covered, and user feedback and feature requests are welcome.
Session 5: Time variable gravity corrections
Chairs: M. Van Camp (Belgium) / O. Francis (Luxemburg)
The correction of temporal changes is an essential component of the processing of gravity observations. An overview about the Earth tides, ocean tide loading and atmospheric corrections will be provided, and the IGRS 2020 Conventions discussed. Contributions on software implementation are welcome too.
The abstract submission was closed by March 18th 2022.