Stennis Space Center International Workshop on Radiometric and Geometric Calibration Aims and Goals Bruce A. Davis, Ph.D. Co-Chair, CEOS/ISPRS Cal/Val Joint Task Force

Stennis Space Center Background (how we got here) Joint Task Force originated from the CEOS WGCV Terrain Mapping Sub Group on the premise that a standard format for sensor parameters should be established. A resolution was passed that stated: - Noting the disparate way in which Earth observing sensor parameters are specified and quoted, and - Recognizing that proper use, understanding and intercomparison of sensor parameters depends on clear unambiguous definition, - WGCV Recommends that a task force be established with ISPRS to formulate a plan for standardization of radiometric and geometric parameters of sensors.

Stennis Space Center Terms of Reference Collect and collate lists of parameters used to describe Earth observing sensors. Make an analysis of these and recommend a standard list of parameters for presenting descriptions of EO satellites. Identify ambiguity and confusion within these terms and recommend methods and means of clarifying these issues Prepare a document that sets out standard methods of describing EO sensors Communicate and consult widely with the user community

Stennis Space Center Purpose (Why we are here) The purpose of this workshop is to: 1. Review best practices for post-launch calibration of commercial aerial and satellite sensor imagery for government uses, 2. Explore possibilities for standardizing calibration practices, and, The Workshop will lead to: A Presentation of these results to the ISPRS General Assembly as a Joint ISPRS/CEOS-WGCV report.

Stennis Space Center Possible Problem & Resolution Problem - The goal of listing and analyzing the many parameters use to describe Earth observing sensors is very ambitious. A recommendation to the full ISPRS Commission is needed by July of Opportunity - During this workshop there will be several presentations that refer to both sensor systems and data products derived from those sensor systems. Resolution - The Joint Task Force may want to consider putting forth recommendations concerning a subset of parameters that are discussed at this workshop. This does not mean that any topic of discussion at this workshop is lost or less important. Taking a smaller piece of work and completing it will be better than not completing a larger amount of work in the eyes of the ISPRS Commission.

Stennis Space Center Transition of Chair Vicki Zanoni will take over the duties of Joint Task Force Chair for the remainder of its life. Vicki will present the findings from this workshop and represent the Joint Task Force at the ISPRS General Assembly meeting in July