Other
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm23a0397k&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM23A-0397
Other
2723 Magnetic Reconnection (7526, 7835), 2794 Instruments And Techniques
Scientific paper
To achieve the highest resolution measurement of the physics of magnetic reconnection, the MMS SMART measurements will utilize a high data rate burst storage system for capturing those intervals when the MMS spacecraft traverse important regions of interest. Two basic modes of data taking are planned, Slow Survey and Fast Survey. Fast Survey mode is targeted at the broad regions of the magnetosphere where reconnection can occur. Slow Survey is aimed an regions of secondary science importance. In Fast Survey, all instruments in the SMART suite continually send high rate data to the Central Instrument Data Processor (CIDP) which holds this data in a circular buffer. Along with this data, each instrument sends a burst data quality (BDQ) flag which represents the scientific "quality" of the preceding period for consideration as a burst interval. The CIDP on each spacecraft collects the individual BDQ's and combines them via a predetermined algorithm into a spacecraft data quality (SDQ) flag. Each spacecraft then sends its individual SDQ to the other three spacecraft via the Interspacecraft Ranging and Alarm System (IRAS). After a short latency period all four spacecraft have all four SDQ values and compute a mission data quality (MDQ) flag. If this flag is above the appropriate threshold then all spacecraft save identical data intervals from from the circular buffer for transmission to the ground during the next downlink. If This flexible scheme will yield optimized science data collection and allows the evolution of the burst data criteria as the best burst triggers are identified.
Bounds Scott R.
Burch James. L.
Ergun Robert E.
Hesse Matthias
Kletzing Craig A.
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