From ewine at strw.leidenuniv.nl Thu Oct 4 05:17:05 2001 From: ewine at strw.leidenuniv.nl (ewine at strw.leidenuniv.nl) Date: Thu, 4 Oct 2001 11:17:05 +0200 (MEST) Subject: [asac] Draft ASAC report Message-ID: <200110040917.LAA02239@deuterium.strw.leidenuniv.nl> Dear ASAC members, Enclosed please find a postscript file with the first draft of the ASAC report. It is based on the input sent to me by the various liaisons, with an executive summary, introduction and summary section added. Because of the different writing styles, I tried to homogenize the reports somewhat, but some sections are clearly still written more compactly (or in "bullet" style, e.g. the operations section) compared with others. I also tried to remove text that covered non-ASAC issues and added a specific ASAC recommendation after each section in case it was not provided. Please check the wording of these carefully. I copied all recommendations to the summary section and shortened them slightly, but the list is still very long! Please let me know whether we should focus these further, especially in the case of the operations and software recommendations. In the executive summary, I tried to highlight only the most important issues. The text obviously still needs polishing and some appendices still need to be added, but I would appreciate your comments on this draft as soon as possible, in any case by October 9. The updated operations document (Appendix C) follows in a separate e-mail. The document on the enhancements, including the prioritization, will follow early next week. You should also receive soon from Al Wootten the draft minutes of the meeting (written by Peter Shaver, many thanks!). Please read these also carefully. With best regards, Ewine From ewine at strw.leidenuniv.nl Thu Oct 4 05:42:47 2001 From: ewine at strw.leidenuniv.nl (ewine at strw.leidenuniv.nl) Date: Thu, 4 Oct 2001 11:42:47 +0200 (MEST) Subject: [asac] draft ASAC report Message-ID: <200110040942.LAA02447@deuterium.strw.leidenuniv.nl> Dear ASAC members, Since the NRAO mailer is slow in distributing the postscript files, I have also posted them at my Web site: http://www.strw.leidenuniv.nl/~ewine/report01b.ps http://www.strw.leidenuniv.nl/~ewine/operations.ps Happy reading! Ewine From awootten at NRAO.EDU Thu Oct 4 10:01:25 2001 From: awootten at NRAO.EDU (Al Wootten) Date: Thu, 4 Oct 2001 10:01:25 -0400 (EDT) Subject: [asac] Minutes of ASAC meeting" Message-ID: <200110041401.KAA25851@polaris.cv.nrao.edu> Dear ASAC members and ALMA Administrators and friends, Thanks to Peter Shaver for providing minutes for the Sanitago meeting, and to others for their comments now incorporated into a draft version suitable for approval at the 10 October ASAC telecon (1415UT). The ASAC report is also in draft and will be issued in due course; the minutes convey the basic results of the meeting for your advance information. You may find the minutes on the web at: http://www.cv.nrao.edu/~awootten/mmaimcal/asac/asacsep01minutes.html Please send any additional requests for changes to me. Clear skies, Al +--------------------------------------------------------+ | Alwyn Wootten (http://www.cv.nrao.edu/~awootten/) | | Project Scientist, Atacama Large Millimeter Array/US | | Astronomer, National Radio Astronomy Observatory | | 520 Edgemont Road, Charlottesville, VA 22903-2475, USA | | (804)-296-0329 voice Help us build The ALMA| | (804)-296-0278 FAX {> {> {> {> | +----------------------------------^-----^-----^-----^---+ From ewine at strw.leidenuniv.nl Tue Oct 9 09:31:10 2001 From: ewine at strw.leidenuniv.nl (ewine at strw.leidenuniv.nl) Date: Tue, 9 Oct 2001 15:31:10 +0200 (MEST) Subject: [asac] Draft of enhancements document available Message-ID: <200110091331.PAA13108@deuterium.strw.leidenuniv.nl> October 9, 2001 Dear ASAC members, A draft of the document "Scientific Justification for the ALMA Enhancements" can be downloaded from: http://www.strw.leidenuniv.nl/~ewine/enhancements.ps 19M or http://www.strw.leidenuniv.nl/~ewine/enhancements.pdf 2M For Bands 1, 4, 8 and the 2G correlator, it is nearly identical to our previous document. The cases for Band 10 and the ACA have been added, together with an introduction, a more general description of the receiver bands (including the bands in the Baseline project and bands 2 and 5), and a short summary of the prioritization at the end. As suggested by the project, I have also added some absolute value (Top priority, Very high priority etc.) to the categories. Not all figures are yet in final form; in particular: - Figure 1 is still lacking - Figure 7 should be shortened to <0.5 page by taking just the lowest 2 spectra (I would like to keep some line survey figure in the manuscript, since it is also relevant for the 2G correlator discussion) - Figure 11 may be improved with more recent CO 2-1 and/or HCO+ 1-0 data (if I find time) Furthermore: - Table 1 will be extended to add the main science drivers (cf. Table in our September 2000 report) - Table 2: this is a subset of the table sent in June by Hasegawa et a.l; I selected some highlights to show that some projects need the ACA whereas others don't. Comments welcome. Finally, we have to decide whether ACA stands for Atacama Compact Array or ALMA Compact Array. I thought the former, but there are official ALMA memos with both names on the Web (even one with ALMA Complementary Array)! Put in your vote now.... The big memo by Guilloteau, Pety and Gueth on the ACA simulations is nearly finished and should be put on the Web soon (this is the document to which we refer both in the ASAC report and in the enhancements document). The ASAC report still needs an extra paragraph on future work on the ACA simulations, since it belongs in that document, not in the enhancements document. One important point to note is that the current ALMA + SD results are probably on the optimistic side because they use rather stringent specifications for the SD pointing and beam errors. Please send comments on the enhancements document by THURSDAY at the latest, since it has to be distributed to some committees (e.g., the ESO-science & technology committee) by Friday. Also, remember to send comments on the draft ASAC report by TODAY. Talk to you all tomorrow at the ASAC telecon at 14:15 UT, With best wishes, Ewine From awootten at NRAO.EDU Tue Oct 9 11:14:27 2001 From: awootten at NRAO.EDU (Al Wootten) Date: Tue, 9 Oct 2001 11:14:27 -0400 (EDT) Subject: [asac] Telecon tomorrow 10 October 2001 1415 UT Message-ID: <200110091514.LAA19077@polaris.cv.nrao.edu> A strawman agenda may be found at: www.cv.nrao.edu/~awootten/mmaimcal/asac/asacoct01agenda.html I'll wait on adding the science case until later today. CALL DATE: OCT-10-2001 (Wednesday) CALL TIME: 10:15 AM EASTERN TIME = 1415 UT DURATION: 1 hr USA Toll Free Number: 800-857-2849 USA Toll Number: +1-630-395-0079 PASSCODE: 25646 LEADER: Dr Al Wootten for security reasons, the passcode 25646 and the leader's name will be required to join your call. Clear skies, Al +--------------------------------------------------------+ | Alwyn Wootten (http://www.cv.nrao.edu/~awootten/) | | Project Scientist, Atacama Large Millimeter Array/US | | Astronomer, National Radio Astronomy Observatory | | 520 Edgemont Road, Charlottesville, VA 22903-2475, USA | | (804)-296-0329 voice Help us build The ALMA| | (804)-296-0278 FAX {> {> {> {> | +----------------------------------^-----^-----^-----^---+ From ewine at strw.leidenuniv.nl Tue Oct 9 12:03:10 2001 From: ewine at strw.leidenuniv.nl (ewine at strw.leidenuniv.nl) Date: Tue, 9 Oct 2001 18:03:10 +0200 (MEST) Subject: [asac] Enhancements document Message-ID: <200110091603.SAA14383@deuterium.strw.leidenuniv.nl> October 9, 2001 Dear ASAC members, Some people have reported problems in printing the documents either in postscript or pdf format. These can be traced back to the nice [C I] Orion maps from the Mt Fuji telescope (see Band 10 science case), perhaps because of a Japanese -> US/European format conversion problem. I have therefore also put a version on the Web without this figure as: http://www.strw.leidenuniv.nl/~ewine/enhancements2.ps or http://www.strw.leidenuniv.nl/~ewine/enhancements2.pdf The document should have 23 pages in total. The initial responses indicate that Atacama Compact Array is indeed the preferred name for the ACA... Happy reading! Ewine From awootten at NRAO.EDU Wed Oct 10 11:08:32 2001 From: awootten at NRAO.EDU (Al Wootten) Date: Wed, 10 Oct 2001 11:08:32 -0400 (EDT) Subject: [asac] Summary report of 26 Sep 01 cryo/optics meeting Message-ID: <200110101508.LAA09263@polaris.cv.nrao.edu> Geoff sent a message which our mailer rejected as too full of content: "The following is a short summary from Wolfgang Wild on the cryo/optics meeting at RAL. Geoff" Not short enough Wolfgang! I placed this at: http://www.cv.nrao.edu/~awootten/mmaimcal/SummaryRALCryoOpticsmeeting26Sep01.pdf for your easy retrieval. Clear skies, Al From ewine at strw.leidenuniv.nl Fri Oct 12 04:58:07 2001 From: ewine at strw.leidenuniv.nl (ewine at strw.leidenuniv.nl) Date: Fri, 12 Oct 2001 10:58:07 +0200 (MEST) Subject: [asac] New version ASAC report Message-ID: <200110120858.KAA03670@deuterium.strw.leidenuniv.nl> Dear ASAC members, A new version of the ASAC report has been posted at: http://www.strw.leidenuniv.nl/~ewine/report01b.ps http://www.strw.leidenuniv.nl/~ewine/report01b.pdf The main changes are in the executive summary (somewhat shortened, but not very much), the addition of Section 4 on the prioritization of the enhancements, removal of any statements on priorities from the other sections (in particular the ACA section), and re-arranging/shortening the summary recommendations. Appendix C (operations report) and D (program science day) have also been added. There should be 39 pages in total. Please send any final comments by Sunday night, Central European Time, since the report has to be submitted by Monday morning. The new version of the Enhancements document will be posted sometime tomorrow. Thanks for your help, Have a nice weekend, Ewine From ewine at strw.leidenuniv.nl Sat Oct 13 10:37:46 2001 From: ewine at strw.leidenuniv.nl (Ewine van Dishoeck) Date: Sat, 13 Oct 2001 16:37:46 +0200 Subject: [asac] New version enhancements document Message-ID: <200110131437.f9DEbkL10522@hydrogen.strw.leidenuniv.nl> Dear ASAC members, A new version of the enhancements document has been posted at: http://www.strw.leidenuniv.nl/~ewine/enhancements.ps http://www.strw.leidenuniv.nl/~ewine/enhancements.pdf (with enhancements2.ps or .pdf the version without figure 9). The main changes are in the executive summary (prioritization added) and the ACA section. There should be 21 pages in total. Please send any final comments by Monday morning 8 am Central European Time. Thanks again for all your constructive comments! With best wishes, Ewine From tetsuo.hasegawa at nao.ac.jp Sun Oct 14 06:24:07 2001 From: tetsuo.hasegawa at nao.ac.jp (Tetsuo Hasegawa) Date: Sun, 14 Oct 2001 19:24:07 +0900 Subject: [asac] Comments ASAC report In-Reply-To: <200110120858.KAA03670@deuterium.strw.leidenuniv.nl> References: <200110120858.KAA03670@deuterium.strw.leidenuniv.nl> Message-ID: Dear Ewine, Thank you for your effort in finalizing the documents. Let me just propose some fine-tunings to the already great reports. With best, Tetsuo *********** <> Page 4, line 1: "significantly delayed" ->"delayed by one or two years" (just as Kaifu-san wrote in his letter) Page 4, line 4 in 2nd paragraph: "$815 million" -> "$816 million" (the cost estimate E-ACC will hear from E-AEC is more evolved one after detailed reviewing, and is JUST $816 million!) Page 4, line 7 of the 1st paragraph in Chapter 4: Insert the following sentence before the one starting "It is therefore with considerable reluctance..." "Many of the enhancements are, at the same time, the key features of the Japanese project which has been conceived and developed." (The statement just before this will give relief to the European and North American community. But it could be read by our community in Japan as we are "buying in" a pre-determined project filling in the gap between the budget and scope. This idea is, as you can imagine, very unpopular among Japanese scientific community and within MEXT.) Page 5, line 2: "high priority" -> "higher priority" Page 5, Title of Chapter 5 and other places in the text: "Atacama Compact Array" -> "ALMA Compact Array" (What ACA stands for is am confusing problem. In the E-AEC telecon last Thursday, we have chosen "ALMA Compact Array" because it states more clearly ACA's association to ALMA. ) Page 5, 4th paragraph: "essential" -> "very important" (to avoid the question "Why didn't you plan include ACA from the beginning then?") Page 5, 2nd line from bottom: Should we omit "key aspects of the source structure can be missed or"? (I think this sounds too strong, especially in view of our converging understanding of the simulation results --- ACA helps us to make images acculate to <1%, while ALMA + SD alone can reproduce them with half the dynamic range. The same statement appears in the Justification document, but that may be fine because it is then embedded in a background description.) Page 8, last line of the 5th paragraph: "consider the WIDAR architecture" -> "consider also the WIDAR architecture" *********** <> Page 15, line 3 of the first paragraph: "64 telescopes" -> "telescopes" (We have not decided how to correlate the signal from ACA antennas, and making the 2G correlator so that it can handle the ACA signal as a subarray is still an option. The statement here makes sense without the explicit number of the antennas.) Page 23, the bottom line: "high" -> "higher" -- _______________________________________________________________ Tetsuo HASEGAWA, D. Sc. ALMA-J Project Scientist Professor, National Astronomical Observatory of Japan 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan Phone +81-422-34-3780 / FAX +81-422-34-3764 _______________________________________________________________ From ewine at strw.leidenuniv.nl Mon Oct 15 15:55:38 2001 From: ewine at strw.leidenuniv.nl (Ewine van Dishoeck) Date: Mon, 15 Oct 2001 21:55:38 +0200 Subject: [asac] final versions of reports Message-ID: <200110151955.f9FJtcY24442@hydrogen.strw.leidenuniv.nl> Dear ASAC members, The final versions of the ASAC report and the enhancements document are posted at the usual places: http://www.strw.leidenuniv.nl/~ewine/report.pdf or .ps http://www.strw.leidenuniv.nl/~ewine/enhancements.pdf I also put them, together with the Tex/Latex files, in my anonymous ftp directory at: % ftp noordzee.strw.leidenuniv.nl > login as anonymous > cd pub/ewine > get enhancements.ps (or .pdf or .tex) > get report.ps (or .pdf or .tex) > bye Thanks again for all your input and comments! With best wishes, Ewine From ewine at strw.leidenuniv.nl Tue Oct 16 10:36:57 2001 From: ewine at strw.leidenuniv.nl (ewine at strw.leidenuniv.nl) Date: Tue, 16 Oct 2001 16:36:57 +0200 (MEST) Subject: [asac] enhancements document Message-ID: <200110161436.QAA27800@deuterium.strw.leidenuniv.nl> Dear ASAC members, Some people have reported problems with the current version of the enhancements.pdf file on the Web, again with Figure 9. I have therefore put a second version on the Web using a different ps -> pdf conversion program, but still including Figure 9. This version is now given as: http://www.strw.leidenuniv.nl/~ewine/enhancements2.pdf Recall that all files can also be retrieved through anonymous ftp at: % ftp noordzee.strw.leidenuniv.nl > login as anonymous > cd pub/ewine > get enhancements.ps (or .pdf or .tex) > get report.ps (or .pdf or .tex) > bye Hope this helps, Ewine From soliver at tuc.nrao.edu Tue Oct 16 16:08:27 2001 From: soliver at tuc.nrao.edu (Stacy Oliver) Date: Tue, 16 Oct 2001 13:08:27 -0700 Subject: [asac] [almanews] ALMA Memo 394 Released Message-ID: ALMA Memo #394 ALMA Band 9 Optics Layout A. Baryshev (SRON), W. Wild (SRON) 2001/09/10 In this report a mm wave optics prototype for an Atacama Large Millimeter Array (ALMA) receiver cartridge is discussed. Mainly the ALMA frequency band 9 (602-720 GHz) is considered. However the same design approach is applicable to the receiver optics of any other ALMA bands. The high frequency cartridges (bands 7-10) have been decided to have no intermediate optics between the telescope secondary mirror and the cartridge cold optics. (See notes of Tucson optics meeting). Consequently, in the optical design of band 9 cartridge full signal path with all focusing elements are considered as free design parameters. In this report a concept of choosing and optimizing these parameters is discussed. The design starts from an optimal corrugated and diagonal horn field representation. A possibility of distortion compensation by a pair of ellipsoidal mirrors is discussed. A concept of frequency independent radiation coupling between the horn and the Cassegrain telescope system is presented. An expression for parameters of two elliptical mirrors giving rise to frequency independent matching of the horn to the telescope is given. A practical corrugated horn for signal path of mixer and a practical diagonal horn for local oscillator (LO) part of mixer are proposed. Based on the horn and the ALMA prototype antenna design a two-mirror layout for ALMA band 9 is proposed. The alignment accuracy of optical components within the cartridge is considered. The alignment accuracy between the cartridge and the secondary mirror is also considered. View a pdf version of ALMA Memo 394. http://www.alma.nrao.edu/memos/html-memos/alma394/memo394.pdf Download a ps version of ALMA Memo 394. http://www.alma.nrao.edu/memos/html-memos/alma394/memo394.ps ============================================================================= ALMAnews is a broadcast service. To unsubscribe, send an e-mail message to majordomo at nrao.edu with "unsubscribe almanews" in the message body. From tetsuo.hasegawa at nao.ac.jp Mon Oct 22 20:44:45 2001 From: tetsuo.hasegawa at nao.ac.jp (Tetsuo Hasegawa) Date: Tue, 23 Oct 2001 09:44:45 +0900 Subject: [asac] enhancements document In-Reply-To: <200110161436.QAA27800@deuterium.strw.leidenuniv.nl> References: <200110161436.QAA27800@deuterium.strw.leidenuniv.nl> Message-ID: Dear ASAC members, Yutaro Sekimoto noticed an inconsistency between our "Enhancements Document" and the ALMA frontend specification; the former states that Band 10 covers from 767 GHz to 950 GHz (Pages 3 and 11), while the specification says it is from 787 GHz to 950 GHz (see Table 1 of the attached document). I do not remember any discussion on changing this spec, and I think it is simply our mistake in the ASAC document. With best, Tetsuo -- _______________________________________________________________ Tetsuo HASEGAWA, D. Sc. ALMA-J Project Scientist Professor, National Astronomical Observatory of Japan 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan Phone +81-422-34-3780 / FAX +81-422-34-3764 _______________________________________________________________ From awootten at NRAO.EDU Tue Oct 23 10:38:38 2001 From: awootten at NRAO.EDU (Al Wootten) Date: Tue, 23 Oct 2001 10:38:38 -0400 (EDT) Subject: [asac] enhancements document In-Reply-To: References: <200110161436.QAA27800@deuterium.strw.leidenuniv.nl> Message-ID: <200110231438.KAA09803@polaris.cv.nrao.edu> Dear ASAC Members, According to my materials also the lower frequency bound for Band 10 is 787 GHz. The latest version of the receiver specifications lists this (http://www.cv.nrao.edu/~awootten/mmaimcal/asac/ALMA_FE_specs_V20.pdf) as discussed at our May 2001 telecon meeting (http://www.cv.nrao.edu/~awootten/mmaimcal/asac/asacmay01agenda.html and http://www.mma.nrao.edu/committees/ASAC/asacmay01minutes.html). This has not changed, and no change request is pending, since the original White Paper. The attached document was too long for propagation to the list Clear skies, Al Bounced message from Tetsuo: ----------------------------------------------------------------------- Dear ASAC members, (Sorry, I failed to attach the file.) Yutaro Sekimoto noticed an inconsistency between our "Enhancements Document" and the ALMA frontend specification; the former states that Band 10 covers from 767 GHz to 950 GHz (Pages 3 and 11), while the specification says it is from 787 GHz to 950 GHz (see Table 1 of the attached document). I do not remember any discussion on changing this spec, and I think it is simply our mistake in the ASAC document. With best, Tetsuo ----------------------------------------------------------------------- From soliver at tuc.nrao.edu Tue Oct 23 13:16:26 2001 From: soliver at tuc.nrao.edu (Stacy Oliver) Date: Tue, 23 Oct 2001 10:16:26 -0700 Subject: [asac] [almanews] ALMA Memo 392 Released Message-ID: ALMA Memo #392 Low Cost Cross Multiply Accumulate Unit for FX Correlators J.D. Bunton (CSIRO) 2001-09-21 Keywords: Correlators, Cross Multiply Acummulate, FX An architecture for the cross multiply accumulate unit of an FX correlator is presented which reduces the on chip hardware to the complex multiply accumulator and a single buffer. All other memory is off-chip. This results in a low cost implementation of the cross multiply accumulate unit View a pdf version of ALMA Memo 392. http://www.alma.nrao.edu/memos/html-memos/alma392/memo392.pdf Download a ps version of ALMA Memo 392. http://www.alma.nrao.edu/memos/html-memos/alma392/memo392.ps ============================================================================= ALMAnews is a broadcast service. To unsubscribe, send an e-mail message to majordomo at nrao.edu with "unsubscribe almanews" in the message body. From tetsuo.hasegawa at nao.ac.jp Tue Oct 23 14:07:05 2001 From: tetsuo.hasegawa at nao.ac.jp (Tetsuo Hasegawa) Date: Wed, 24 Oct 2001 03:07:05 +0900 Subject: [asac] enhancements document In-Reply-To: <200110231438.KAA09803@polaris.cv.nrao.edu> References: <200110161436.QAA27800@deuterium.strw.leidenuniv.nl> <200110231438.KAA09803@polaris.cv.nrao.edu> Message-ID: Dear Al, Thanks for a follow up. The specification document I was referring to was exactly what you have in your site. With best, Tetsuo At 10:38 -0400 01.10.23, Al Wootten wrote: >Dear ASAC Members, > >According to my materials also the lower frequency bound for Band 10 is >787 GHz. The latest version of the receiver specifications lists this >(http://www.cv.nrao.edu/~awootten/mmaimcal/asac/ALMA_FE_specs_V20.pdf) >as discussed at our May 2001 telecon meeting >(http://www.cv.nrao.edu/~awootten/mmaimcal/asac/asacmay01agenda.html >and >http://www.mma.nrao.edu/committees/ASAC/asacmay01minutes.html). >This has not changed, and no change request is pending, since the original >White Paper. > >The attached document was too long for propagation to the list > >Clear skies, >Al >Bounced message from Tetsuo: >----------------------------------------------------------------------- >Dear ASAC members, > >(Sorry, I failed to attach the file.) > >Yutaro Sekimoto noticed an inconsistency between our "Enhancements >Document" and the ALMA frontend specification; the former states that Band >10 covers from 767 GHz to 950 GHz (Pages 3 and 11), while the specification >says it is from 787 GHz to 950 GHz (see Table 1 of the attached document). >I do not remember any discussion on changing this spec, and I think it is >simply our mistake in the ASAC document. > >With best, > >Tetsuo >----------------------------------------------------------------------- -- _______________________________________________________________ Tetsuo HASEGAWA, D. Sc. ALMA-J Project Scientist Professor, National Astronomical Observatory of Japan 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan Phone +81-422-34-3780 / FAX +81-422-34-3764 _______________________________________________________________ From soliver at tuc.nrao.edu Fri Oct 26 14:25:06 2001 From: soliver at tuc.nrao.edu (Stacy Oliver) Date: Fri, 26 Oct 2001 11:25:06 -0700 Subject: [asac] [almanews] ALMA Memo 395 Released Message-ID: ALMA Memo #395 Alignment Tolerances for ALMA Optics B.Lazareff (IRAM) 25-Oct-2001 Keywords: Receiver, Optics, Alignment, Tolerance A tolerance analysis of the alignment of the ALMA FE optics is presented. The following performance criteria are taken into account: a) loss of on-axis efficiency from aperture plane misalignment; b) focal plane co-alignment of the two beams of each band; c) aberrations when off-axis mirrors operate between wavefronts not centered on the foci of the ellipsoid; d) non-uniform phase across the primary beam resulting from aperture plane misalignment. It is found, based on reasonable machining tolerances, and existing FEM simulations of pressure bending, that the adopted goals can be met, the driving goals being on-axis efficiency (a) and primary beam phase (d). The present study, especially in view of the fact that detailed designs of cartridge internal optics do not exist at the time of writing, can only be considered as a guideline. View a pdf version of ALMA Memo 395. http://www.alma.nrao.edu/memos/html-memos/alma395/memo395.pdf Download a ps version of ALMA Memo 395. http://www.alma.nrao.edu/memos/html-memos/alma395/memo395.ps ============================================================================= ALMAnews is a broadcast service. To unsubscribe, send an e-mail message to majordomo at nrao.edu with "unsubscribe almanews" in the message body.