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Understanding User Needs for Polar Motion and UT1-UTC Predictions

This document explores the diverse needs of operational and scientific users regarding Polar Motion and UT1-UTC predictions. Through surveys and interactive feedback, we delve into their data requirements, including accuracy, update frequency, and user-friendliness. We outline a unique set of IERS prediction products tailored to meet these needs, ensuring reliable and accessible information. Additionally, we address how current and future users, including academics and engineers, desire real-time predictions and require analytical expressions for enhanced decision-making across various applications.

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Understanding User Needs for Polar Motion and UT1-UTC Predictions

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  1. EOP Prediction Users W. Wooden, D. McCarthy, B. Luzum

  2. User Information • Sources of Information • Survey questionnaires • Product usage • Interactive feedback • Future Expectations?

  3. Operational System Engineers • Academics • Scientists Who are the Users?

  4. Positioning and Navigation Research Pointing Timekeeping Why do they want predictions?

  5. Users’ Manual • Data • Accurate • Dependable • User friendly DELIVER ON DEMAND SOFTWARE With Test Data What do they want? It depends on the application

  6. General Requirements • One unique set of IERS prediction products • Easily accessible • User friendly • Reliable • Meets users’ needs for • Accuracy • Update frequency • Spacing • Prediction interval • Metadata

  7. Operational and Scientific Users of Polar Motion Predictions Operational and Scientific Users of UT1-UTC Predictions Accuracy?

  8. Scientific Users Prediction Length? Operational Users

  9. Scientific Users Update Frequency? Operational Users

  10. Spacing? Operational Users Scientific Users (Some also want analytical expressions)

  11. How do they want to receive predictions? Operational Users Scientific Users

  12. Future Users? • Probably about the same mix of operational and scientific users • Some “specialty” users • Real-time availability • Particularly UT1 • Order of magnitude improvement in accuracy • New Products

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