Working groups

The GGOS-FA-UHS activities are realized by dedicated working groups with contributions of the IAG components.

Working groups coordinates by the GGOS Focus Area Unified Height System

• JWG 0.1.1. Vertical Datum Standardization
• JWG 0.1.2. Strategy for the Realization of the International Height Reference System (IHRS)
• JWG 0.1.3: Implementation of the International Height Reference Frame (IHRF)

Supporting IAG Components

• GGOS Bureau of Products and Standards (GGOS-BPS)
• IAG Commission 1: Reference Frames
• IAG Commission 2: Gravity Field
• IAG Inter Commission Committee on Theory (ICCT)
• IERS: International Earth Rotation and Reference Systems as umbrella of the IAG geometry services.
• IGFS: International Gravity Field Service as umbrella of the IAG gravity services.
• BGI: Bureau Gravimétrique International
• ICGEM: International Centre for Global Earth Models
• ISG: International Service for the Geoid
• PSMSL: Permanent Service for Mean Sea Level
• Working Group TIGA: Tide Gauge Benchmark Monitoring of the IGS: International GNSS Service
  
  The extension of the global vertical frame activities at national and regional level are ensured by the participation of the IAG Sub-Commissions devoted to the regional representations especially in geometric reference frames (IAG Commission 1) and regional gravity networks and geoid (IAG Commission 2).

Affine studies / projects

• GOCE+ HSU – Height System Unification with GOCE