Fiducial Reference Measurements (FRM) are a suite of independent, fully characterized, and traceable ground measurements that follow the guidelines outlined by the GEO/CEOS Quality Assurance framework for Earth Observation (QA4EO, opens an external URL in a new window). These FRM provide the maximum Return On Investment (ROI) for a satellite mission by delivering, to users, the required confidence in data products, in the form of independent validation results and satellite measurement uncertainty estimation, over the entire end-to-end duration of a satellite mission. 

The Fiducial Reference Measurements for Soil Moisture (FRM4SM) project is a European Space Agency (ESA)-funded project focused on establishing methods, protocols, and tools required for traceable in situ measurements of soil moisture to support the validation of satellite retrieval products. More specifically, the goas of the FRM4SM project are:

  • the evolution of the International Soil Moisture Network (ISMN) and the development of quality indicators that characterize station and measurement quality;
  • the evolution of the Quality Assurance for Soil Moisture (QA4SM) online validation platform;
  • the development of "FRM protocols and procedures" for soil moisture that provide guidance on how to establish traceability for in situ soil moisture reference measurements and how to setup, operate, and maintain FRM networks; and
  • the execution of validation case studies for the Soil Moisture and Ocean Salinity (SMOS) mission.
[Translate to English:] Flow chart of the FRM4SM project structure

Funding

European Space Agency (ESA), opens an external URL in a new window

Project duration

May 2021 – December 2024

Partners

AWST GmbH (AT), opens an external URL in a new window
Université Toulouse III - CESBIO (FR), opens an external URL in a new window

CLIMERS role

Scientific lead
Characterization of in situ soil moisture measurement errors and uncertainties, development of quality data flagging algorithms and establishment of fiducial measurement datasets
Development of state-of-the-art validation protocols
Maintenance and evolution of the QA4SM validation service with implementation of the developed protocols
Outreach and scientific community involvement

CLIMERS staff involved

Alexander Gruber, opens an external URL in a new window
Irene Himmelbauer, opens an external URL in a new window 
Wolfgang Preimesberger, opens an external URL in a new window
Nicolas Bader, opens an external URL in a new window
Daniel Aberer, opens an external URL in a new window 

Project URL

FRM4SM @ ESA Earth Online, opens an external URL in a new window