ips-sws-alert -- Experimental Solar Wind Shock Alert
About ips-sws-alert	English (USA)
The shock detection algorithm used is a modification of an algorithm by A.G. Rubin, M.A. Heinman, E.W. Cliver, K.H Bounar and T.R. Detman, presented in a paper "Interplanetary Shock Detector Testing" from the proceedings of the "Evaluation of Space Weather Forecasts" workshop, held at Boulder, Colorado, June 19-21 1996. US ACE satellite solar wind data (velocity, density, temperature, magnetic field data obtained from US SPace Weather Prediction Center) are correlated with a step function to determine a shock. Shocks have been arbitrarily classified into: Weak (velocity change <60km/sec), Moderate (60 < velocity chnage < 120km/sec), Strong (velocity change >120km/sec) A distinct step in each of the four solar wind parameters ( velocity, density, temperature and magnetic field) is required for shock detection. In addition, a change in solar wind velocity of at least 25km/sec, and a density ratio of at least 1.2 is required. You can view and download the US ACE satellite solar wind data used for this service at: ACE Real Time Solar Wind NOTE: IPS Solar Wind Shock Alerts are an automated experimental product and false alarms and missed events are possible. Please read our product disclaimer on the IPS Home Page before using this alert. ACE spacecraft detector may saturate during strong proton events. During such periods shock detection is not possible. The sudden impulse alert service can provide back-up to shock alerts during such periods. You can view the data used to generate these reports at:http://www.swpc.noaa.gov/ace/ To see the collection of prior postings to the list, visit the ips-sws-alert Archives.
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