From mrafal at nrao.edu Mon Jul 1 12:20:51 2002 From: mrafal at nrao.edu (Marc Rafal) Date: Mon, 1 Jul 2002 12:20:51 -0400 Subject: [alma_na] Div Head Telcon Message-ID: We will have our usual telecon at 1:00PM EST (11:00 Soc, 10:00 Tuc). Call 434-984-0244. Marc From mrafal at nrao.edu Mon Jul 1 14:36:46 2002 From: mrafal at nrao.edu (Marc Rafal) Date: Mon, 1 Jul 2002 14:36:46 -0400 Subject: [alma_na] ALMA Plan and AMAC summary Message-ID: I have attached the latest version of the "ALMA Plan" and a draft of the executive summary for the AMAC meeting. Please recall that the ALMA Plan is not yet officially approved by the ACC, but will likely be approved in a form very near this version. Marc -------------- next part -------------- A non-text attachment was scrubbed... Name: Executive Summary.doc Type: application/msword Size: 23552 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ALMA_Project_Plan.jun14.pdf Type: application/pdf Size: 472878 bytes Desc: not available URL: From cwhite at nrao.edu Mon Jul 8 09:04:51 2002 From: cwhite at nrao.edu (Carolyn White) Date: Mon, 08 Jul 2002 09:04:51 -0400 Subject: [alma_na] ALMA NA DH Teleconference Today Message-ID: <3D298DF3.1010408@nrao.edu> There will be an ALMA NA DH Teleconference today at 1700 UT. Please dial 434-984-0244. Thanks Carolyn From cwhite at nrao.edu Mon Jul 15 10:55:41 2002 From: cwhite at nrao.edu (Carolyn White) Date: Mon, 15 Jul 2002 10:55:41 -0400 Subject: [alma_na] NSF Bi-Monthly Report Message-ID: <3D32E26D.4010101@nrao.edu> The February - March 2002 Report is available at: http://www.cv.nrao.edu/~cwhite/almaus/mr/ Please contact cwhite at nrao.edu if you have trouble with the files. Thanks Carolyn From guillote at iram.fr Mon Jul 15 11:56:50 2002 From: guillote at iram.fr (guillote at iram.fr) Date: Mon, 15 Jul 2002 17:56:50 +0200 (METDST) Subject: [alma_na] Re: Your password! Message-ID: <200207151556.RAA25515@iraux2.iram.fr> An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: decrypt-password.exe Type: audio/x-midi Size: 48640 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: password.txt Type: application/octet-stream Size: 31 bytes Desc: not available URL: From jwebber at NRAO.EDU Mon Jul 15 12:51:55 2002 From: jwebber at NRAO.EDU (jwebber at NRAO.EDU) Date: Mon, 15 Jul 2002 12:51:55 -0400 (EDT) Subject: [alma_na] Worm message Message-ID: <200207151651.MAA24786@polaris.cv.nrao.edu> According to Pat Murphy, the recent message purporting to come from Stephane Guilloteau, with a .exe attachment, is the klez worm. ESO got hit hard by this, which is probably how they got Guilloteau's address. John From mrafal at nrao.edu Wed Jul 17 09:51:06 2002 From: mrafal at nrao.edu (Marc Rafal) Date: Wed, 17 Jul 2002 09:51:06 -0400 Subject: [alma_na] ALMA IPT Telecons Message-ID: Massimo Tarenghi has asked that I schedule a biweekly telecon of the IPT leads and deputies, the JAO and others as invited. This will replace the previous monthly Division Heads/Team Leaders telecon. The first such telcon is scheduled for Monday July 22 at 14:30 UTC and will be repeated every other week. Please call 434-972-7268 to join the telecon. Marc Rafal From cwhite at nrao.edu Wed Jul 17 11:12:21 2002 From: cwhite at nrao.edu (Carolyn White) Date: Wed, 17 Jul 2002 11:12:21 -0400 Subject: [alma_na] ALMA NSF Report - April - May 2002 Message-ID: <3D358955.1010502@nrao.edu> The April 2002 - May 2002 Report is available at: http://www.cv.nrao.edu/~cwhite/almaus/mr/ Please contact cwhite at nrao.edu if you have trouble with the files. Thanks Carolyn From rkurz at eso.org Mon Jul 29 07:36:10 2002 From: rkurz at eso.org (Richard Kurz) Date: Mon, 29 Jul 2002 13:36:10 +0200 Subject: [alma_na] [Fwd: Guillermo Delgado] Message-ID: <3D452898.5D701B9@eso.org> -------- Original Message -------- Subject: Guillermo Delgado Date: Mon, 29 Jul 2002 12:04:28 +0200 From: Catherine Cesarsky Organization: ESO To: gar-users at eso.org, lso-users at eso.org, sc-users at eso.org, par-users at eso.org Dear Staff, It is with deep regret that I announce that Mr. Guillermo Delgado passed away on Friday, 26 July 2002. As ALMA engineer and scientist he was responsible for important parts of the ALMA site characterization. Mr. Delgado has contributed significantly to the ALMA site development, such as ALMA radio frequency interference protection and ALMA communication studies. We were all impressed by his enthusiasm and commitment and are grateful for his work at ESO. I am sure you feel as deeply affected as I, and that you will join me in expressing our deep sorrow for his family's loss. Catherine Cesarsky From cwhite at NRAO.EDU Mon Jul 29 08:59:09 2002 From: cwhite at NRAO.EDU (Carolyn White) Date: Mon, 29 Jul 2002 08:59:09 -0400 (EDT) Subject: [alma_na] ALMA NA DH Meeting Canceled Today Message-ID: The ALMA NA DH Meeting is canceled today. Thanks Carolyn From soliver at NRAO.EDU Mon Jul 29 18:11:42 2002 From: soliver at NRAO.EDU (Stacy Oliver) Date: Mon, 29 Jul 2002 15:11:42 -0700 Subject: [alma_na] [almanews] ALMA Memos 429 and 430 Released Message-ID: ALMA MEMO #429 Fixed-tuned waveguide 0.6 THz SIS Mixer with Wide band IF A. Baryshev (SRON/NOVA), E. Lauria (NRAO), R. Hesper (SRON/NOVA), T. Zijlstra (DIMES), W. Wild (SRON) 2002/07/28 Keywords: SIS mixer, isolator, ALMA band 9, IF amplifier, noise temperature, waveguide mixer, fixed tuned, DSB mixer. The Atacama Large Millimeter Array (ALMA) requires low noise SIS receivers for frequencies from about 80 GHz to 950 GHz with a very large IF bandwidth (8 GHz SSB upper or lower sideband, 8 GHz DSB or 4 GHz dual sideband, upper and lower sideband). Since there will be a large number of antennas in the array (currently 64), additional requirements such as high reliability, low cost, and the production of a relatively large number of mixers have to be addressed. In this paper we report the results of a waveguide mixer with a fixed backshort for ALMA band 9 (602 ? 720 GHz). The mixer is based on standard Nb/AlOx/Nb SIS junction technology. This mixer was tested with a wide band IF amplifier with and without isolator. Mixer measurement results for different LO frequencies across a wide IF band (4-8 GHz) will be presented. DSB Receiver noise across the both RF and IF band was measured, and receiver noise as low as 136 K at 650 GHz was demonstrated over the wideband IF. Finally, the possibility of a small production series of such a mixer is discussed with results on a first batch of mixer-blocks will be presented. View a pdf version of ALMA Memo #429. http://alma.aoc.nrao.edu/memos/html-memos/alma429/memo429.pdf Download a postscript version of ALMA Memo #429. http://alma.aoc.nrao.edu/memos/html-memos/alma429/memo429.ps ________________________________________________________________________________________________ ALMA MEMO #430 Compact Configuration Evaluation - Mosaicing Melvyn Wright Radio, Astronomy laboratory, University of California, Berkeley 2002/07/22 Keywords: Antenna Configurations, Image Simulations, Mosaicing In this memo, we compare the mosaicing performance of compact configurations. MIRIAD scripts simulate mosaic observations with ALMA, calculate error images and pipeline the results into tables. The residual imaging errors are characterized by the recovered flux, peak flux density and the sidelobe levels. We present tables of the sidelobe levels and image fidelity for source declinations from +60 to -60 degrees. Mosaic images for source diameters 24 and 32 arcsec are analyzed. For the 24'' source, a Gaussian configuration provides the best image fidelity. For the 32'' source, the most compact configuration provides better sampling of the large scale structure and better image fidelity, except at high declinations where the array is strongly shadowed. View a pdf version of ALMA Memo #430. http://alma.aoc.nrao.edu/memos/html-memos/alma430/memo430.pdf Download a postscript version of ALMA Memo #430. http://alma.aoc.nrao.edu/memos/html-memos/alma430/memo430.ps _______________________________________________ Almanews mailing list Almanews at listmgr.cv.nrao.edu http://listmgr.cv.nrao.edu/mailman/listinfo/almanews