OBJECTIVE ANALYSIS OF SEA-LEVEL PRESSURE AND SURFACE TEMPERATURE, DEW POINT, AND WIND,
Abstract
The successive-approximation technique (SAT) was developed for the objective analysis of sea-level pressure and surface temperature, dew point, and wind over the eastern United States. SAT anal yses are demonstrated to be at least comparable to subjective analyses. Continuity within a series of objective analyses is good, and the agreement among the independently analyzed fields of pressure, temperature, and wind is excellent. Developmental tests using the airways observation network showed that the best analysis is produced by using large influence radii, a smoothing oper ator, and a grid mesh of approximately 50 mi. The effect of using large influence radii and smoothing in SAT is to approximate curvilinear interpolation between observations. We interpret this to mean that such curvilinear interpolation is the best method of specifying the analysis field between data points. A typical analysis for the eastern U.S. requires 2 or 3 min on an IBM 7090 electronic computer. An altertive analysis procedure, which performs curvilinear interpolation directly, is suggested as a possible method for reducing the machine time required for an analysis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1962
- Accession Number
- AD0413387
Entities
People
- Albert Thomasell
- James G. Welsh