NASA-LLIS-0407

Lessons Learned - Helios I Communication Link Degradation Due To Interferometer Effect and Spin Modulation From Spacecraft Antenna (~1972)

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:50:37Z
date available	2017-09-04T17:50:37Z
date copyright	06/24/1996
date issued	1996
identifier other	EXBEQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std/handle/yse/173800
description abstract	Abstract: The composite pattern of two Helios I low-gain antenna elements caused an "interferometer effect", with rapidly varying phase and amplitude values occurring over a small but critical portion of the antenna pattern. Design of spacecraft antennas must include careful attention to amplitude and phase characteristics of the combined antenna system pattern, rather than to those of the individual elements alone.
language	English
title	NASA-LLIS-0407	num
title	Lessons Learned - Helios I Communication Link Degradation Due To Interferometer Effect and Spin Modulation From Spacecraft Antenna (~1972)	en
type	standard
page	3
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1996
contenttype	fulltext
subject keywords	Communication Systems
subject keywords	Flight Equipment
subject keywords	Spacecraft