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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 742475.0, MPI für Astronomie / Publikationen_mpia
Probing interferometric parallax with interplanetary spacecraft
Authors:Rodeghiero, G.; Gini, F.; Marchili, N.; Jain, P.; Ralston, J. P.; Dallacasa, D.; Naletto, G.; Possenti, A.; Barbieri, C.; Franceschini, A.; Zampieri, L.
Date of Publication (YYYY-MM-DD):2017
Title of Journal:Advances in Space Research
Volume:60
Issue / Number:1
Start Page:153
End Page:165
Audience:Not Specified
Abstract / Description:We describe an experimental scenario for testing a novel method to measure distance and proper motion of astronomical sources. The method is based on multi-epoch observations of amplitude or intensity correlations between separate receiving systems. This technique is called Interferometric Parallax, and efficiently exploits phase information that has traditionally been overlooked. The test case we discuss combines amplitude correlations of signals from deep space interplanetary spacecraft with those from distant galactic and extragalactic radio sources with the goal of estimating the interplanetary spacecraft distance. Interferometric parallax relies on the detection of wavefront curvature effects in signals collected by pairs of separate receiving systems. The method shows promising potentialities over current techniques when the target is unresolved from the background reference sources. Developments in this field might lead to the construction of an independent, geometrical cosmic distance ladder using a dedicated project and future generation instruments. We present a conceptual overview supported by numerical estimates of its performances applied to a spacecraft orbiting the Solar System. Simulations support the feasibility of measurements with a simple and time-saving observational scheme using current facilities.
Free Keywords:Distance; Interferometric parallax phase; Interferometry; Spacecraft
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0273-1177
URL:http://adsabs.harvard.edu/abs/2017AdSpR..60..153R
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