Engineering topics

Macy, William

Publications and source records attributed to Macy, William.

3 records

NASA NTRS1995

Compression research on the REINAS Project

We present approaches to integrating data compression technology into a database system designed to support research of air, sea, and land phenomena of interest to meteorology, oceanography, and earth science. A key element of the Real-Time Environmental Information Network and Analysis System (REINAS) system is the real-time component: to provide data as soon as acquired. Compression approaches being considered for REINAS include compression of raw data on the way into the database, compression of data produced by scientific visualization on the way out of the database, compression of modeling results, and compression of database query results. These compression needs are being incorporated through client-server, API, utility, and application code development.

Rosen, Eric↗

NASA NTRS1989

The H2 4-0 S(0, 1, and 2) quadrupole features in Jupiter

In the wake of the detection of Jupiter's H2 S4(2) feature, low-temperature laboratory measurements of NH3 are used in a detailed analysis to ascertain an improved equivalent width for the H2 S4(0) line. Good agreement is obtained between equivalent widths computed from published models and the equivalent widths observed for this line. It is noted that the approximately 150 K effective formation line temperature at Jupiter's averaged disk center, which has been determined from the nominal S4(2)/S4(0) ratio, is in keeping with an H2 ortho-para ratio for Jovian equilibrium tropospheric H2.

Smith, Wm. Hayden↗

NASA NTRS1986

A detected feature at the expected wavelength for the HD R5(0) line in Jupiter's and Uranus' atmospheres

A feature was detected at the expected wavelength for the HD R5(0) line in Jupiter's and Uranus' atmospheres. An upper limit for Neptune was also found. Added to the earlier detection of a similar feature for Saturn, it is proposed that all evidence from this type of measurement can be interpreted as arising from a D/H ratio of about .0004 for all the major planets. This value is not in agreement with measurements from CH3D transitions, and is at least fifty times the accepted interstellar medium value of 5 x .000001, implying deuterium enhancement in the solar system via fractionation in the proto-solar nebula.

Smith, Wm. Hayden↗