Oct 3, 2008 Space Weather Prediction Center STEREO BEACON DATA LISTS # ==================== Notice ================================ October 3, 2008: NOAA/SWPC is pleased to once again make STEREO in-situ data from the PLASTIC and IMPACT instruments available through this website. Automatically updating dynamic plots of solar wind plasma, magnetic field and energetic particles are available showing the past 6 hours and 24 hours of data from each spacecraft. We plan to make 3-day, 7-day, and 30-day plots available soon. May 9, 2008: Due to an inability to be certain the IMPACT and PLASTIC data being provided through this website are correct, data will not be available until further notice. Users are asked to retrieve STEREO real-time data from the STEREO Science Center website. http://stereo-ssc.nascom.nasa.gov/ # =========================================================== See description below. See data plots at http://www.swpc.noaa.gov/stereo/ http://www.swpc.noaa.gov/ftpmenu/lists/stereo.html (1- and 5-min data) via Anonymous FTP ftp.swpc.noaa.gov /pub/lists/stereo Available: via SWPC Anonymous FTP server ftp.swpc.noaa.gov /pub/lists/stereo/ --- most recent data lists via SWPC Web site: http://swpc.noaa.gov/ftpdir/lists/stereo/ ****************************************************************** ** Please read the SWPC Disclaimer at http://www.swpc.noaa.gov/ ** ****************************************************************** SWPC provides near-real-time and recent data, solar and geomagnetic indices and solar event reports created from preliminary reports. Preliminary data may contain errors or be revised after further review. The historical products in this SWPC Warehouse are the preliminary reports as originally published. SWPC does not encourage the use of preliminary data for research purposes. Links to on-line data at SWPC and archive sites with final data: http://www.swpc.noaa.gov/Data/ ****************************************************************** Please send comments and questions to SWPC.Webmaster@noaa.gov Report problems to SWPC.CustomerSupport@noaa.gov ******************************************************************************** ******************************************************************************** Real-Time Beacon data from the Solar Terrestrial Relations Observatory (STEREO) spacecraft are made available by the Space Weather Prediction Center (SWPC) as updating data lists and plots. The plots are available through the SWPC Web site at URL: http://www.spaceweather.gov/stereo/index.html . Daily lists, though described below, are not yet available. --- STEREO Instruments Average Intervals PLASTIC - Plasma and Suprathermal Ion Composition 1-min and 1-hour IMPACT - In-situ Measurements of Particles and CME Transients IMPACT/MAG - Magnetometer 1-min and 1-hour IMPACT/SEPT - Solar Electron Proton Telescope 5-min and 1-hour IMPACT/HET - High Energy Telescope 5-min and 1-hour All data lists are ASCII text files with a standard SWPC data list format. There are two lists for each of the instruments; a 2-hour list and a daily list. The 2-hour lists contain the most recent data from the instrument and are updated in near-real-time. The Magnetometer and PLASTIC data is available as 1-min averages and updated once a minute. The SEPT and HET data is available as 5-minute averages and updated once every 5 minutes. The Daily lists for all instruments are updated once a hour beginning at 0031UT daily. NOTE: It is possible that old, non-real-time data, will be available. SWPC will update these lists with data from the previous day that arrive within 30 minutes of the start of the next UT day. --- Filenaming Conventions The filenames for the 2 hour lists do not change. Users retrieving data frequently are requested to use these short files. sta_ designates data from the STEREO-A spacecraft, stb_ designates data from STEREO-B. sta_plastic_1m.txt stb_plastic_1m.txt sta_mag_1m.txt stb_mag_1m.txt sta_impact_5m.txt - data from SEPT stb_impact_5m.txt - data from SEPT sta_het_5m.txt stb_het_5m.txt The daily lists have the UT date prefixed to the basic filename. For example 20071201_sta_mag_1m.txt is the filename for Mag data on Dec 1, 2007. 20071201_sta_plastic_1m.txt 20071201_stb_plastic_1m.txt 20071201_sta_mag_1m.txt 20071201_stb_mag_1m.txt 20071201_sta_impact_5m.txt 20071201_stb_impact_5m.txt 20071201_sta_het_5m.txt 20071201_stb_het_5m.txt --- Retention Daily files of 1-min and 5-min data are retained for 30 days. --- File format o The first line begins with :Product: followed by the file name. o The second line begins with :Issued: followed by the date/time the file was created. o The next lines begin with # and contains header information about the list. The number of header lines is NOT guarenteed to be fixed. o The lines following the header (#) lines are data records, there are no header lines after the data begins. o The file ends with the last data record. o There is a data record for each time interval. For example, a completed daily 5-min file contains 288 data records-- one for each 5 minute interval in the day. When no data are available there is a record containing missing data values for that interval. o Fields within each record are delimitated by white space. Records are written with a formatted write statement so the field widths do not change. However, SWPC reserves the right the change the format as needed. --- Valid Data The header lines on each list identify the data values, units, and missing data values. The range of valid values are shown below: --- Date/time fields for all data lists Dates are shown as year month day (2003 09 06) and "Modified Julian Day (MJD) as defined in an early SWPC database. The SWPC MJD for Jan 1, 2003 is 52640 The SWPC MJD for Jan 1, 2004 is 53005 Time is shown as HourMin (0035) and seconds of the day (2100) --- Status Flags Status fields for all instruments are a one digit integer from 0 through 9 where 0 = nominal data, 9 = no data, and 1-8 indicate bad data. More specifically: PLASTIC 0 = Data values are nominal 1 = Not used 2 = Not used 3 = Not used 4 = Not used 5 = Not used 6 = Not used 7 = Not used 8 = Solar Wind Density < 0.1/cm^3 - considered un-reliable 9 = No data available, usually because no site was tracking STEREO IMPACT/MAG 0 = Data values are nominal 1 = Not used 2 = Not used 3 = Not used 4 = Not used 5 = Not used 6 = Not used 7 = Not used 8 = Not used 9 = No data available, usually because no site was tracking STEREO IMPACT/SEPT 0 = Data values are nominal 1 = A single 'one minute' value used to create 5 minute average 2 = Not used 3 = Two 'one minute' values used to create 5 minute average 4 = Not used 5 = Three 'one minute' values used to create 5 minute average 6 = Not used 7 = Four 'one minute' values used tp create 5 minute average 8 = Not used 9 = No data available, usually because no site was tracking STEREO IMPACT/HET 0 = Data values are nominal 1 = A single 'one minute' value used to create 5 minute average 2 = Not used 3 = Two 'one minute' values used to create 5 minute average 4 = Not used 5 = Three 'one minute' values used to create 5 minute average 6 = Not used 7 = Four 'one minute' values used tp create 5 minute average 8 = Not used 9 = No data available, usually because no site was tracking STEREO -------------------------------------------------------------------------------- IMPACT/MAG - Magnetometer Description Format Units min/max IMF R-component in RTN coordinates Float nT TBD IMF T-component in RTN coordinates Float nT TBD IMF N-component in RTN coordinates Float nT TBD IMF component magnitude Float nT TBD IMF latitude in RTN coordinates Float degrees -90.0 / 90.0 IMF longitude in RTN coordinates Float degrees 0.0 / 360.0 -------------------------------------------------------------------------------- PLASTIC - Plasma and Suprathermal Ion Composition Description Format Units min/max Solar wind proton density Float p/cc 0.0 / TBD Solar wind bulk speed Float km/s TBD Solar wind ion temperature Float degrees K TBD -------------------------------------------------------------------------------- IMPACT/SEPT - Solar Electron Proton Telescope Description Format Units min/max Differential electron flux 35-65 keV Float p/(cm2-sec-ster-MeV) 0.00/TBD Differential electron flux 125-255 keV Float p/(cm2-sec-ster-MeV) 0.00/TBD Differential proton flux 75-137 keV Float p/(cm2-sec-ster-MeV) 0.00/TBD Differential proton flux 137-623 keV Float p/(cm2-sec-ster-MeV) 0.00/TBD Differential proton flux 623-2224 keV Float p/(cm2-sec-ster-MeV) 0.00/TBD -------------------------------------------------------------------------------- IMPACT/HET - High Energy Telescope Description Format Units min/max Differential proton flux 13-21 MeV Float p/(cm2-sec-ster-MeV) 0.00 /TBD Differential proton flux 40-100 MeV Float p/(cm2-sec-ster-MeV) 0.00 /TBD ================================================================================= ================================================================================= ================================================================================= HISTORICAL NOTICES November 19, 2007 STEREO PLASTIC VELOCITY DATA CHANGE The STEREO PLASTIC instrument data processing was updated at ~0000 UTC November 17, 2007 to use the total (or bulk) velocity, rather than the previously used radial velocity. This change was made because a correction is applied to the bulk speed that is not applied to the individual components. The net effect raises the speeds as seen by STEREO-B by ~30 km/s and the STEREO-A by ~5 km/s. This should result in better agreement with the velocities reported from ACE/SWEPAM. ================================================================================= =================================================================================