送信者: Alan R. Whitney 宛先: Wayne Cannon ; Tetsuro Kondo ; Junichi Nakajima ; Mamoru Sekido ; Nori Kawaguchi Cc: ; ; ; ; ; Andrej Finkelstein ; ; ; ; ; ; ; 件名 : Draft VLBI Interface Proposal 日時 : 1999年2月5日 2:27 Dear IVS Interface Group and others, Please find attached an updated version of the draft VLBI standard interface document that we worked on last week at CRL in Japan. I am very pleased by the significant progress that we made in the short time available and am encouraged that we can see this through to final agreement. The document is essentially the same as the one we quickly put together last week, but I have changed some names, updated some descriptions, cleaned up some text and created a better diagram. There are still pieces that need to be added: 1. Connector and pinout choices -- Nakajima-san is working to make a proposal. 2. Signal timing specs and diagrams -- Nakajima-san is also working on this. On the last page of the document there is an expanded list of comments and questions that may or may not need direct answers at this time, but that need to be thought about -- I would welcome any comments. I am also sending this e-mail to JIVE, NRAO, and GVWG and others who are likely seeing it for this first time. I welcome any comments or suggestions you may have. I plan to bring this document to the IVS board meeting next week in Germany and seek their formal endorsement of this effort (which I think will be readily given). At this point this effort is primarily focused within IVS, but I want to quickly include all the world's primary players in VLBI, particularly GVWG (Global VLBI Working Group) members and invite them to participate as well. It would be a major step forward if we can all agree on this issue and then begin work towards the long-elusive goal of basic interoperability between various VLBI data-acquisition and correlator systems. The process for formalizing an agreement on a standard interface definition is not yet fully determined. Currently I plan to work primarily within IVS and GVWG, which represent nearly all of the world's VLBI players, and seek an agreement between with two groups on how this process should proceed, assuming that they both feel it is a worthwhile effort. Alan Whitney IVS Technology Coordinator GVWG Technology Coordination Group Member MIT Haystack Observatory Westford, MA 01886 awhitney@haystack.mit.edu P.S. If you have any trouble receiving the document, please let me know. I can fax it to you if necessary.