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Porting Gravitational Wave Signal Extraction to Parallel Virtual Machine (PVM)Laser Interferometer Space Antenna (LISA) is a planned NASA-ESA mission to be launched around 2012. The Gravitational Wave detection is fundamentally the determination of frequency, source parameters, and waveform amplitude derived in a specific order from the interferometric time-series of the rotating LISA spacecrafts. The LISA Science Team has developed a Mock LISA Data Challenge intended to promote the testing of complicated nested search algorithms to detect the 100-1 millihertz frequency signals at amplitudes of 10E-21. However, it has become clear that, sequential search of the parameters is very time consuming and ultra-sensitive; hence, a new strategy has been developed. Parallelization of existing sequential search algorithms of Gravitational Wave signal identification consists of decomposing sequential search loops, beginning with outermost loops and working inward. In this process, the main challenge is to detect interdependencies among loops and partitioning the loops so as to preserve concurrency. Existing parallel programs are based upon either shared memory or distributed memory paradigms. In PVM, master and node programs are used to execute parallelization and process spawning. The PVM can handle process management and process addressing schemes using a virtual machine configuration. The task scheduling and the messaging and signaling can be implemented efficiently for the LISA Gravitational Wave search process using a master and 6 nodes. This approach is accomplished using a server that is available at NASA Ames Research Center, and has been dedicated to the LISA Data Challenge Competition. Historically, gravitational wave and source identification parameters have taken around 7 days in this dedicated single thread Linux based server. Using PVM approach, the parameter extraction problem can be reduced to within a day. The low frequency computation and a proxy signal-to-noise ratio are calculated in separate nodes that are controlled by the master using message and vector of data passing. The message passing among nodes follows a pattern of synchronous and asynchronous send-and-receive protocols. The communication model and the message buffers are allocated dynamically to address rapid search of gravitational wave source information in the Mock LISA data sets.
Document ID
20100024265
Document Type
Conference Paper
Authors
Thirumalainambi, Rajkumar (Stinger Ghaffarin Technologies, Inc. United States)
Thompson, David E. (NASA Ames Research Center Moffett Field, CA, United States)
Redmon, Jeffery (Stinger Ghaffarin Technologies, Inc. United States)
Date Acquired
August 24, 2013
Publication Date
October 14, 2009
Subject Category
Lasers and Masers
Report/Patent Number
ARC-E-DAA-TN901
Meeting Information
Conference on Intelligent Data Understanding (CIDU)(Moffett Field, CA)
Funding Number(s)
CONTRACT_GRANT: NNA08ZG83C
Distribution Limits
Public
Copyright
Other