The present standard defines some 430 radar terms (many of which are brief definitions, cross-references, or identification as acronyms). Of these, some 230 will remain unchanged, 140 will be modified to some degree, 60 will be deleted. 50 new terms will be defined. Revisions, additions, and deletions as necessary to reflect radar literature and usage as it has developed since the last revisions. Revision Standard - Superseded. Definitions for the purpose of promoting clarity and consistency in the use of radar terminology are provided. The definitions represent the consensus of a panel of radar experts.