Identifying Pointing Errors for the NIST 18 Term Error Technique

Author: Zachary Newbold, Bruce Williams, Allen Newell
Publication: AMTA 2009
Copyright Owner: NSI-MI Technologies

The NIST 18 Term Error Analysis Technique uses a combination of mathematical analysis, computer simulation and near-field measurements to estimate the uncertainty for near-field range results on a given antenna and frequency range. A subset of these error terms is considered for alignment accuracy of an antenna’s RF main beam. Of the 18 terms, several have no applicable influence on determining the beam pointing or the terms have a minor effect and when an RSS estimate is performed they are rendered inconsequential. The remainder become the dominant terms for identifying the alignment accuracy. There are six terms that can be evaluated to determine the main beam pointing uncertainty of an antenna with respect to dual band performance. Analysis of the near-field measurements is performed to identify the alignment uncertainty of the main beam with respect to a specified mechanical position as well as to the main beam of the second band.


1125 Satellite Blvd., Suite 100
Suwanee, GA 30024-4629 USA

+1 678 475 8300
+1 678 542 2601

Los Angeles

19730 Magellan Drive
Torrance, CA 90502-1104 USA

+1 310 525 7000
+1 310 525 7100


Unit 51 Harley Road
Sheffield, S11 9SE UK

+44 7493 235224


Newport, RI Finding your local time... 12 Days

Latest Tweets

This site is using cookies for analytical purposes and to provide a better user experience. Read our Privacy Policy for more information.