A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept

doi:10.1007/s00190-021-01479-8

NAOC Open IR

	A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept
	Sekido, Mamoru 1; Takefuji, Kazuhiro 2; Ujihara, Hideki 1; Kondo, Tetsuro 1,9; Tsutsumi, Masanori 1; Kawai, Eiji 1; Hachisu, Hidekazu 3; Nemitz, Nils 3; Pizzocaro, Marco 4; Clivati, Cecilia 4; Perini, Federico 5; Negusini, Monia 5; Maccaferri, Giuseppe 5; Ricci, Roberto 4,5; Roma, Mauro 5; Bortolotti, Claudio 5; Namba, Kunitaka 3; Komuro, Jun'ichi 3; Ichikawa, Ryuichi 3; Suzuyama, Tomonari 6; Watabe, Ken-ichi 6; Leute, Julia 7,8; Petit, Gerard 7; Calonico, Davide 4; Ido, Tetsuya 3
	2021-03-25
Source Publication	JOURNAL OF GEODESY
ISSN	0949-7714
Volume	95 Issue:4 Pages:27
Abstract	We have developed a broadband VLBI (very long baseline interferometry) system inspired by the concept of the VLBI Global Observing System (VGOS). The new broadband VLBI system was implemented in the Kashima 34 m antenna and in two transportable stations utilizing 2.4 m diameter antennas. The transportable stations have been developed as a tool for intercontinental frequency comparison but are equally useful for geodesy. To enable practical use of such small VLBI stations in intercontinental VLBI, we have developed the procedure of node-hub style VLBI: In joint observation with a large, high sensitivity 'hub' antenna, the closure delay relation provides a virtual delay observable between 'node' stations. This overcomes the limited sensitivity of the small diameter node antennas, while error sources associated with large diameter antennas, such as gravitational deformation and delay changes in necessarily long signal cables, are eliminated. We show that this scheme does not result in an increased sensitivity to radio source structure if one side of the baseline triangle is kept short. We have performed VLBI experiments utilizing this approach over both short range and intercontinental distance. This article describes the system components, signal processing procedure, experiment, and results in terms of baseline repeatability. Our measurements reveal signatures of structure effects in the correlation amplitude of several of the observed radio sources. We present a model of the frequency-dependent source size for 1928+738 derived from correlation amplitude data observed in four frequency bands.
Keyword	Broadband VLBI Transportable VLBI Direct RF-sampling Closure delay
Funding Organization	JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF
DOI	10.1007/s00190-021-01479-8
Language	英语
Funding Project	JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF[ANR-10-LABX-48-01]
Funding Organization	JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; JGN research testbed network ; JGN research testbed network ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; Joint Development Research of the National Astronomical Observatory of Japan (NAOJ) in 2013-2014 ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF ; French National Research Agency under the LABEX Cluster of Excellence FIRST-TF
WOS Research Area	Geochemistry & Geophysics ; Remote Sensing
WOS Subject	Geochemistry & Geophysics ; Remote Sensing
WOS ID	WOS:000634834200001
Publisher	SPRINGER
Citation statistics
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/78563
Collection	中国科学院国家天文台
Corresponding Author	Sekido, Mamoru
Affiliation	1.Natl Inst Informat & Commun Technol, Kashima Space Technol Ctr, Kashima, Japan 2.Japan Aerosp Explorat Agcy, Usuda Deep Space Ctr, Saku, Nagano, Japan 3.Natl Inst Informat & Commun Technol, Koganei, Tokyo, Japan 4.Ist Nazl Ric Metrol, Turin, Italy 5.Ist Nazl Astrofis, Ist Radioastron, Bologna, Italy 6.Natl Metrol Inst Japan, Tsukuba, Ibaraki, Japan 7.Bur Int Poids & Mesures, Sevres, France 8.Observ Paris, LNE SYRTE, Paris, France 9.Shanghai Astron Observ, Shanghai, Peoples R China
Recommended Citation GB/T 7714	Sekido, Mamoru,Takefuji, Kazuhiro,Ujihara, Hideki,et al. A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept[J]. JOURNAL OF GEODESY,2021,95(4):27.
APA	Sekido, Mamoru.,Takefuji, Kazuhiro.,Ujihara, Hideki.,Kondo, Tetsuro.,Tsutsumi, Masanori.,...&Ido, Tetsuya.(2021).A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept.JOURNAL OF GEODESY,95(4),27.
MLA	Sekido, Mamoru,et al."A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept".JOURNAL OF GEODESY 95.4(2021):27.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院国家天文台机构知识库