Title 15, Commerce and TradeRelease 119-110

§8517 Observing System Simulation Experiments

Title 15 › CHAPTER 111 — WEATHER RESEARCH AND FORECASTING INNOVATION › SUBCHAPTER I — UNITED STATES WEATHER RESEARCH AND FORECASTING IMPROVEMENT › § 8517

Last updated Sep 23, 2026|Official source

Summary

The Assistant Administrator for Oceanic and Atmospheric Research must run simulation studies to measure how different weather observing systems add value. These studies must look at effects on global forecasts, hurricane track and strength forecasts, tornado warning time and accuracy, mid-latitude severe storm outbreaks, and storms that can cause extreme rain and flooding lasting 6 hours to 1 week. The work must be done with other NOAA groups, other federal agencies, the U.S. weather industry, and university partners. The studies must quantify how proposed space, aircraft, and ground sensors would change analyses and forecasts, compare design options, and weigh performance and costs for saving lives and property. They must be done before buying any government-owned or -leased operational observing system or any major new commercial data purchase with a lifecycle cost over $500,000,000. Not later than 30 days after April 18, 2017, a study on Global Navigation Satellite System Radio Occultation must be completed; not later than 120 days after April 18, 2017, a study on a geostationary hyperspectral sounder global constellation must be completed. After finishing all studies, the Assistant Administrator must publish the results and an assessment of public and private weather data sourcing options, including availability, affordability, and cost-effectiveness, developed under section 50503 of title 51.

Full Legal Text

Title 15, §8517

Commerce and Trade, Source: USLM XML via OLRC

(a)In general
In support of the requirements of section 8516 of this title, the Assistant Administrator for Oceanic and Atmospheric Research shall undertake Observing System Simulation Experiments, or such other quantitative assessments as the Assistant Administrator considers appropriate, to quantitatively assess the relative value and benefits of observing capabilities and systems. Technical and scientific Observing System Simulation Experiment evaluations—
(1)may include assessments of the impact of observing capabilities on—
(A)global weather prediction;
(B)hurricane track and intensity forecasting;
(C)tornado warning lead times and accuracy;
(D)prediction of mid-latitude severe local storm outbreaks; and
(E)prediction of storms that have the potential to cause extreme precipitation and flooding lasting from 6 hours to 1 week; and
(2)shall be conducted in cooperation with other appropriate entities within the National Oceanic and Atmospheric Administration, other Federal agencies, the United States weather industry, and academic partners to ensure the technical and scientific merit of results from Observing System Simulation Experiments or other appropriate quantitative assessment methodologies.
(b)Requirements
Observing System Simulation Experiments shall quantitatively—
(1)determine the potential impact of proposed space-based, suborbital, and in situ observing systems on analyses and forecasts, including potential impacts on extreme weather events across all parts of the Nation;
(2)evaluate and compare observing system design options; and
(3)assess the relative capabilities and costs of various observing systems and combinations of observing systems in providing data necessary to protect life and property.
(c)Implementation
Observing System Simulation Experiments—
(1)shall be conducted prior to the acquisition of major Government-owned or Government-leased operational observing systems, including polar-orbiting and geostationary satellite systems, with a lifecycle cost of more than $500,000,000; and
(2)shall be conducted prior to the purchase of any major new commercially provided data with a lifecycle cost of more than $500,000,000.
(d)Priority Observing System Simulation Experiments
(1)Global Navigation Satellite System Radio Occultation
Not later than 30 days after April 18, 2017, the Assistant Administrator for Oceanic and Atmospheric Research shall complete an Observing System Simulation Experiment to assess the value of data from Global Navigation Satellite System Radio Occultation.
(2)Geostationary hyperspectral sounder global constellation
Not later than 120 days after April 18, 2017, the Assistant Administrator for Oceanic and Atmospheric Research shall complete an Observing System Simulation Experiment to assess the value of data from a geostationary hyperspectral sounder global constellation.
(e)Results
Upon completion of all Observing System Simulation Experiments, the Assistant Administrator shall make available to the public the results an assessment of related private and public sector weather data sourcing options, including their availability, affordability, and cost-effectiveness. Such assessments shall be developed in accordance with section 50503 of title 51.

Reference

Citations & Metadata

Citation

15 U.S.C. § 8517

Title 15, Commerce and Trade

Last Updated

Sep 23, 2026

Release point: 119-110