详情

原文传递 Predictions of GPS X-Set Performance during the Places Experiment.

题名：	Predictions of GPS X-Set Performance during the Places Experiment.
作者：	Bogusch,R. L.;Kneepp,D. L.;
关键词：	NUCLEAR EXPLOSION SIMULATION, GLOBAL POSITIONING SYSTEM, POWER SPECTRA, MATHEMATICAL PREDICTION, RECEIVERS, NAVIGATION SATELLITES, BARIUM, FOURIER ANALYSIS, VERY HIGH FREQUENCY, CARRIER FREQUENCIES, STRIATIONS, SCINTILLATION, AUTOMATIC FREQUENCY CONTROL.
摘要：	Preexperimental predictions of GPS X-set receiver performance during the PLACES barium release experiment are presented for carrier frequencies from 150 to 250 MHz. Detailed examples of the X-set phase, frequency and code tracking performance are shown. For mean carrier power-to-noise density ratios of 35 db-Hz and less, erroneous Doppler aiding from the AFC/Costas loop can cause degradations to the otherwise adequate code tracking loop. All receiver performance results presented are obtained using numerical multiple phase screen calculations of frequency-selective signal propagation through simulated barium clouds. These calculations are based upon a statistical model of a striated barium cloud developed from Fourier analysis of back propagation data taken during the STRESS barium release series. This model includes representation of the important barium striation parameters derived from measured power spectral density (PSD) properties including phase standard deviation, spectral index, and outer scale.
总页数：	123
报告类型：	科技报告