Accession Number : ADA310013

Title :   Measurement of Group Delay at ns Level Precision in Exterior Ballistic Measurements,

Corporate Author : NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH

Personal Author(s) : Bixian, Luo ; Jian, Luo

PDF Url : ADA310013

Report Date : MAY 1996

Pagination or Media Count : 25

Abstract : The importance of making use of GPS measurement systems to carry out external measurement track determinations is briefly described. Test measurement levels which have been reached inside and outside China are elucidated as well as problems which exist. pulse modulation and demodulation technologies to effectively resolve test measurement accuracies are put forward. Opting for the use of time interval measurements in place of phase measurements, it is possible to effectively make systems with the same frequencies and different frequencies attain ns level group time delay measurement precisions and it is possible to help in resolving GPS system zero correction difficulties.

Descriptors :   *EXTERIOR BALLISTICS, TEST AND EVALUATION, TIME INTERVALS, MEASUREMENT, ACCURACY, DELAY, TRANSLATIONS, DEMODULATION, FREQUENCY CONVERSION, CHINA, PULSE MODULATION, CHINESE LANGUAGE.

Subject Categories : Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE