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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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All sourcesNASA NTRSDOE OSTI
NASA NTRS1971

The AGK3, a basis for a general (northern) reference catalogue of positions and proper motions

The original concept of the international AGK3 program is presented and a report on the methods applied and on the progress of the work is given. The results in the form of revised positions of the AGK2 reduced to the FK4 system, and of AGK3, can be extrapolated easily to earlier epochs, as far back as those of AGK1, and the mean error for these epochs will permit one the deriving of reliable values for systematic corrections of the old catalogs. By using the AGK2/3 positions a general catalog of roughly to the ninth magnitude can be constructed by including large catalogs such as AGK1, AC, and Yale. Thus a new edition of the type of the SAO catalog for the northern hemisphere can be produced.

Dieckvoss, W.↗
NASA NTRS1971

Recent progress on the Yale zone catalogues

The measurement or reduction of stars in southern zones is reported. The catalog for the -35 deg to -40 deg zone is rapidly nearing completion. All the reductions and comparisons with other catalogs have been completed. The tables and star charts are being prepared in final form for publication.

Hoffleit, D.↗
NASA NTRS1971

Comparison of the SAO and AGK3R star catalogues

The SAO star catalog positions from the GC and the AGK2 and Yale photographic catalogs are compared with the AGK3R catalog. Both catalogs are alleged to be on the system of the FK4. When the differences are considered as accidental errors, the mean errors deduced for positions from the SAO at the epoch 1958.5 range from 0.61 seconds to 0.25 seconds. The systematic differences in right ascension between SAO and AGK3R positions to the north of 60 deg declination indicate that each SAO source represents the FK4 somewhat differently than the AGK3R.

Scott, F. P.↗
NASA NTRS1972

A catalogue of devices applicable to the measurement of boundary layers and wakes on flight vehicles

A literature search was conducted to assemble a catalog of devices and techniques which have possible application to boundary layer and wake measurements on flight vehicles. The indices used in the search were NACA, NASA STAR, IAA, USGRDR and Applied Science and Technology Index. The period covered was 1950 through 1970. The devices contained in the catalog were restricted to those that provided essentially direct measurement of velocities, pressures and shear stresses. Pertinent material was included in the catalog if it contained either an adequate description of a device and associated performance data or a presentation of applicable information on a particular measurement theory and/or technique. When available, illustrations showing the configuration of the device and test condition data were also included.

Miley, S. J.↗