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both the L1 (1.57542-GHz) and L2 gration of the SPDF software system These programs were written by P. Gliebe, R.
(1.2276-GHz) GPS signals. with other software systems, in further- Mani, S. Salamah, and R. Coffin of General This program was written by Sung Byun, ance of the SPDF mission to lead collab- Electric Co. and Jayesh Mehta of Diversitec, Inc., George Hajj, and Lawrence Young of Cal- orative efforts in the collection and uti- for Glenn Research Center . Further informa- tech for NASA’s Jet Propulsion Labora- lization of space physics data and tion is contained in a TSP (see page 1).
tory . Further information is contained in a mathematical models. This program- Inquiries concerning rights for the commer- TSP (see page 1).. ming interface conforms to all applica- cial use of this invention should be addressed This software is available for commercial ble Web services specifications of the to NASA Glenn Research Center, Commercial licensing. Please contact Don Hart of the Cal- World Wide Web Consortium. The in- Technology Office, Attn: Steve Fedor, Mail ifornia Institute of Technology at (818) 393- terface is specified by a Web Services Stop 4-8, 21000 Brookpark Road, Cleveland, 3425. Refer to NPO-40463. Description Language (WSDL) file. The Ohio 44135. Refer to LEW-17385-1.
SPDF Web services software consists of the following components: • A server program for implementation Parallel Adaptive Mesh of the Web services; and Generating Animated Dis- Refinement Library • A software developer’s kit that consists plays of Spacecraft Orbits Parallel Adaptive Mesh Refinement of a WSDL file, a less formal descrip- Tool for Interactive Plotting, Sonifica- Library (PARAMESH) is a package of tion of the interface, a Java class li- tion, and 3D Orbit Display (TIPSOD) is a Fortran 90 subroutines designed to pro- brary (which further eases develop- computer program for generating inter- vide a computer programmer with an ment of Java-based client software), active, animated, four-dimensional easy route to extension of (1) a previ- and Java source code for an example (space and time) displays of spacecraft ously written serial code that uses a logi- client program that illustrates the use orbits. TIPSOD utilizes the program- cally Cartesian structured mesh into (2) of the interface. ming interface of the Satellite Situation a parallel code with adaptive mesh re- This program was written by Robert M. Can- Center Web (SSCWeb) services to com- finement (AMR). Alternatively, in its dey, Bernard T. Harris, and Reine A. Chimiak municate with the SSC logic and data- simplest use, and with minimal effort, of Goddard Space Flight Center . For further base by use of the open protocols of the PARAMESH can operate as a domain- information, access http://spdf.gsfc.nasa.gov/. Internet. TIPSOD is implemented in Java decomposition tool for users who want GSC-14730-1 3D and effects an extension of the pre- to parallelize their serial codes but who existing SSCWeb two-dimensional static do not wish to utilize adaptivity. The graphical displays of orbits. Orbits can be package builds a hierarchy of sub-grids displayed in any or all of the following to cover the computational domain of a Predicting Noise From seven reference systems: true-of-date (an given application program, with spatial Aircraft Turbine- inertial system), J2000 (another inertial resolution varying to satisfy the demands Engine Combustors system), geographic, geomagnetic, geo- of the application. The sub-grid blocks COMBUSTOR and CNOISE are com- centric solar ecliptic, geocentric solar form the nodes of a tree data structure puter codes that predict far-field noise magnetospheric, and solar magnetic. In (a quad-tree in two or an oct-tree in that originates in the combustors of addition to orbits, TIPSOD computes three dimensions). Each grid block has modern aircraft turbine engines es- and displays Sibeck’s magnetopause and a logically Cartesian mesh. The package pecially modern, low-gaseous-emission Fairfield’s bow-shock surfaces. TIPSOD supports one-, two- and three-dimen- engines, the combustors of which some- can be used by the scientific community sional models. times generate several decibels more as a means of projection or interpreta- This program was written by Peter Mac- noise than do the combustors of older tion. It also has potential as an educa- Neice of Raytheon/STX and Kevin Olson of turbine engines. COMBUSTOR imple- tional tool. Documentation and links for George Mason University for Goddard Space ments an empirical model of combustor downloading the software can be found Flight Center . For further information, access noise derived from correlations between at http://sscweb.gsfc.gov/tipsod/ .
http://sdcd.gsfc.nasa.gov/RIB/repositories/in engine-noise data and operational and This program was written by Robert M. Can- house_gsfc/Users_manual/amr_tutorial.html. geometric parameters, and was devel- dey, Reine A. Chimiak, and Bernard T. Harris GSC-14626-1 oped from databases of measurements of Goddard Space Flight Center . For more of acoustic emissions of engines. information contact the Goddard Commercial CNOISE implements an analytical and Technology Office at (301) 286-5810.
computational model of the propaga- GSC-14732-1 Space Physics Data Facility tion of combustor temperature fluctua- Web Services tions (hot spots) through downstream The Space Physics Data Facility turbine stages. Such hot spots are known (SPDF) Web services provides a distrib- to give rise to far-field noise. CNOISE is Diagnosis and Prognosis of uted programming interface to a por- expected to be helpful in determining Weapon Systems tion of the SPDF software. (A general why low-emission combustors are some- The Prognostics Framework is a set of description of Web services is available times noisier than older ones, to provide software tools with an open architecture at http://www.w3.org/ and in many cur- guidance for refining the empirical cor- that affords a capability to integrate var- rent software-engineering texts and arti- relation model embodied in the COM- ious prognostic software mechanisms cles focused on distributed program- BUSTOR code, and to provide insight and to provide information for opera- ming.) The SPDF Web services on how to vary downstream turbine- tional and battlefield decision-making distributed programming interface en- stage geometry to reduce the contribu- and logistical planning pertaining to ables additional collaboration and inte- tion of hot spots to far-field noise. weapon systems. The Prognostics 16 NASA Tech Briefs, February 2005