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The NOAA Real-Time Solar-Wind (RTSW) System Using ACE Data

Zwickl, R. D. and Doggett, K. A. and Sahm, S. and Barrett, W. P. and Grubb, R. N. and Detman, T. R. and Raben, V. J. and Smith, C. W. and Riley, P. and Gold, R. E. and Mewaldt, R. A. and Maruyama, T. (1998) The NOAA Real-Time Solar-Wind (RTSW) System Using ACE Data. Space Science Reviews, 86 (1-4). pp. 633-648. ISSN 0038-6308. doi:10.1023/A:1005044300738.

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The Advanced Composition Explorer (ACE) RTSW system is continuously monitoring the solar wind and produces warnings of impending major geomagnetic activity, up to one hour in advance. Warnings and alerts issued by NOAA allow those with systems sensitive to such activity to take preventative action. The RTSW system gathers solar wind and energetic particle data at high time resolution from four ACE instruments (MAG, SWEPAM, EPAM, and SIS), packs the data into a low-rate bit stream, and broadcasts the data continuously. NASA sends real-time data to NOAA each day when downloading science data. With a combination of dedicated ground stations (CRL in Japan and RAL in Great Britain), and time on existing ground tracking networks (NASA’s DSN and the USAF’s AFSCN), the RTSW system can receive data 24 hours per day throughout the year. The raw data are immediately sent from the ground station to the Space Environment Center in Boulder, Colorado, processed, and then delivered to its Space Weather Operations center where they are used in daily operations; the data are also delivered to the CRL Regional Warning Center at Hiraiso, Japan, to the USAF 55th Space Weather Squadron, and placed on the World Wide Web. The data are downloaded, processed and dispersed within 5 min from the time they leave ACE. The RTSW system also uses the low-energy energetic particles to warn of approaching interplanetary shocks, and to help monitor the flux of high-energy particles that can produce radiation damage in satellite systems.

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Mewaldt, R. A.0000-0003-2178-9111
Additional Information:© Springer International Publishing AG, Part of Springer Science+Business Media. The authors thank R. Conde for designing the low-mode RTSW data stream, P.Mulligan for help in obtaining the USAF tracking, P. Vaughan at RAL for making the arrangements to utilize their Ground Station in the program, K. Pendergast for work on the database system, M. Forman at NASA, A. Thomas and D. Josephson at NOAA for help in supporting this project, J. Joselyn and E. Hildner for helpful input over the course of this project, and L. Puga for help in developing the figures and comments on the text.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1999-10
Issue or Number:1-4
Record Number:CaltechAUTHORS:20150211-095203965
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54706
Deposited By: Deborah Miles
Deposited On:22 Feb 2015 22:38
Last Modified:10 Nov 2021 20:37

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