Basic metrological principles

Basic principles of metrology are described in material produced by the International Bureau of Weights and Measures (BIPM) and the world’s metrology institutes.

For example:

South Georgia Island, contains modified Copernicus Sentinel data ESA LICENCE CC BY-SA 3.0 IGO

Introductory Uncertainty Analysis with a (radiometric) Earth Observation focus

The MetEOC project website provides introductory material on uncertainty analysis. The examples relate mostly to radiometric FRMs (in situ observations with visible and shortwave infrared optical detectors).

The textbook Intermediate Uncertainty Analysis for Earth Observation Instrument Calibration Module from a February 2015 course is available. A video on the law of propagation of uncertainties is particularly helpful as an introduction to both the GUM approach to uncertainty analysis and the basics of error correlation structures.

The same material has also been collated into an NPL eLearning course on Uncertainty analysis for Earth Observation.

The CoMet Toolkit website has an Examples section which includes Jupyter notebooks with training material.

The course Climate Data Records from Satellites: A Metrological Approach explores how metrological approaches may help Earth Observation practitioners develop quantitative characterisations of uncertainty in Earth Observation data. This course consists of two modules:

  • Module 1: Metrology in Earth Observation
  • Module 2: Developing a fundamental climate data record

A metrological approach to FRMs, FDRs and TDPs

The Executive Summary developed for this QA4EO website introduces the application of metrology to FRMs, FDRs and TDPs.

The core concepts are explained in more detail on the FIDUCEO website, and in the NPL eLearning Course Climate Data Records from Satellites.

See QA4EO Documents for more.

Metrological solutions check-2

To ensure that data sets can be relied on, it is important to have a full understanding of the uncertainties. ...While historical sensors can provide critical information of the state of the planet during a period of relatively rapid climatic change, science and society need to know the degree of certainty that can be ascribed to an environmental change inferred from historical Earth Observation data. This is a problem for which metrology can provide solutions.

Introduction, NPL Training Course Climate Data Records from Satellites: A Metrological Approach