STUDIES OF STROBING PERFORMANCE ON A PPI,
Abstract
A series of experiments was designed to evaluate a radar operator's ability to carry out some of the tasks required in the use of presently conceived weapons direction equipment. Positioning accuracy of the strobe dot is of the order of 1/2 to 1 mm. Positioning accuracy is very nearly as good, after only 9 hours practice, for 4 targets or 3 targets per sweep, as it is for only 1 target. Operating errors (that is, errors other than positioning errors) are reduced radically by nine hours of practice, and could probably be reduced to one or two percent with further practice, provided motivation could be maintained. Delay in tracking only 1 target is so much longer and more variable than the delay for each of 4 targets that overall error for the easier task is probably at least as great as for the more difficult. Tracking all targets (up to and including four) continuously offers advantages in tracking procedure which may well overcome the advantages of any reduction in load resulting from intermittent tracking. A discrepancy as small as 1/8 mm between rate-aided dot and target center can be detected about half the time. Discrepancies of 1/2 mm are detected very nearly 100 per cent of the time.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 16, 1957
- Accession Number
- AD0626448
Entities
People
- M. V. Rhoades
- R. M. Hanes
Organizations
- Johns Hopkins University Applied Physics Laboratory