From rsimon at nrao.edu Tue Oct 1 09:48:11 2002 From: rsimon at nrao.edu (Richard Simon) Date: Tue, 01 Oct 2002 09:48:11 -0400 Subject: [alma_na] Re: New ALMA Account numbers References: <3D94D4DC.1000503@nrao.edu> <3D98C8C8.1020500@nrao.edu> Message-ID: <3D99A79B.7090507@nrao.edu> I have received the official word, and my original memo was correct. My apologies for any confusion. According to Charles Beverage, head of NRAO MIS, > ALL purchase requisitions, invoices, correspondence, travel > requests/authorizations, and anything else will be coded with the > following format: > > Business Unit . Object . Subsidiary > > Example: 701.1616.0820 which is ALMA Computer Hardware Front > End IF Switch For completeness, I have attached my original note and .pdf file with the details. Regards, Richard Simon > Revised ALMA Chart of Accounts > > 2002-Sep-27 R. S. Simon > > Starting 2002 October 1st, the ALMA project at NRAO has a new Chart > of Accounts. This change was necessitated by NRAO's adoption of a > new Chart of Accounts. After October 1st, please use only the new > account numbers, and do not use the old J series of accounts. The > revised Chart of Accounts provides significant benefits and > improvements in access, reporting, and budgeting. > > Brief Instructions: > > An ALMA account number consists of three parts, specified with the > following syntax: > > (Business Unit).(Object Class).(Subsidiary) > > Business Unit is one of the major NRAO activities; for all ALMA > accounts the business unit is the same: 701. > > Object Class is the type of expenditure, and should be specified on > all procurements and travel. There are ~60-70 Object Classes, but > for most purposes the simplified version attached is all you will > need. Money is budgeted into 3 of the Object Classes (people, > places, or things), and is spent from one of the other 41. A list of > the official Object Classes is attached. > > Subsidiary is the actual ALMA Work Element number, with a one-to-one > correspondence between the 4-digit Subsidiary Number and a 4-digit > ALMA Work Element Number. A list of the official ALMA Work Elements > (Subsidiaries) is attached, with their funding status for 2003. > > Example: The North American Project orders a new computer. The > account number to charge would be 701.1616.0100 (701 is the ALMA > business unit, 1616 is Computer hardware, and 0100 is the ALMA Work > Element for the North American Project Office). > > Example: Brian Glendenning travels to Germany. The account number > would be 701.1690.2640 (701=ALMA; 1690=Travel-Foreign; 2640=Computing > Subsystem Management) -------------- next part -------------- A non-text attachment was scrubbed... Name: Revised_ALMA_Chart_of_Accounts.pdf Type: application/pdf Size: 17275 bytes Desc: not available URL: From cwhite at nrao.edu Mon Oct 7 08:55:37 2002 From: cwhite at nrao.edu (Carolyn White) Date: Mon, 07 Oct 2002 08:55:37 -0400 Subject: [alma_na] ALMA NA DH Meeting Canceled Message-ID: <3DA18449.10501@nrao.edu> The ALMA NA DH Meeting scheduled for today is canceled. Thanks Carolyn From cwhite at NRAO.EDU Tue Oct 8 10:51:24 2002 From: cwhite at NRAO.EDU (Carolyn White) Date: Tue, 08 Oct 2002 10:51:24 -0400 Subject: [alma_na] [almanews]ALMA Memo 436 Message-ID: <3DA2F0EC.3030108@nrao.edu> ALMA MEMO #436 Band 6 Receiver Noise Measurements using a Pre- Prototype YIG-Tunable LO Eric W. Bryerton, S. K. Pan, Dorsey Thacker, and Kamaljeet Saini In this memo, we present measured receiver noise data of a 200-300 GHz SIS mixer driven by a pre-prototype of the YIG-tunable LO driver followed by a varistor tripler. After identifying and solving some signal-to-noise problems in the LO driver chain, measurements were taken from 220-270 GHz showing an average noise over a 4-12 GHz IF less than 5 K for the worst LO frequency over the identical mixer and varistor tripler being driven by a W-band Gunn oscillator. The average excess noise over all measured LO frequencies is 1.4 K. The optimum LO driver for which these measurements were taken includes a YIG-tuned filter (YTF). LO driver configuration options without the YTF are explored with encouraging initial results. View a pdf version of ALMA Memo #436. http://www.alma.nrao.edu/memos/html-memos/alma436/memo436.pdf Download a postscript version of ALMA Memo #436. http://www.alma.nrao.edu/memos/html-memos/alma436/memo436.ps _______________________________________________ Almanews mailing list Almanews at listmgr.cv.nrao.edu http://listmgr.cv.nrao.edu/mailman/listinfo/almanews From bporter at nrao.edu Wed Oct 9 09:32:11 2002 From: bporter at nrao.edu (Bill Porter) Date: Wed, 09 Oct 2002 09:32:11 -0400 Subject: [alma_na] Procurement Timing Message-ID: <3DA42FDB.3A063406@nrao.edu> As you are probably aware, any procurement which exceeds $250,000 must be approved by NSF before it is placed with the vendor. Pat Donahoe, AUI VP, warned me yesterday that we now should expect an eight (8) week turnaround on NSF approvals. Hence, I am appealing to you on two fronts. First, please allow ample time in your schedules if you have large dollar procurements. Eight weeks for NSF and a week on either end for in-house work adds up to about 2 1/2 months (!). Plan accordingly. Second, understand that if/when your large dollar purchases take 2 1/2 months in procurement, this is not an NRAO Purchasing Office failure. The time for NSF approvals is not something our buyers can control. You are responsible to allow the time in your schedules. My sincere hope is that this is a temporary aberration, and that NSF approvals will return to a more reasonable length of time. Stay tuned. BP From cwhite at NRAO.EDU Tue Oct 15 08:28:19 2002 From: cwhite at NRAO.EDU (Carolyn White) Date: Tue, 15 Oct 2002 08:28:19 -0400 (EDT) Subject: [alma_na] JAO/IPT Teleconference Message-ID: The ALMA Bi-Lateral Teleconference has been renamed to the JAO/IPT Meeting. There will be a meeting today at 1430 UT. Please dial 434-984-0244. Note this number is not our usual number! Thanks Carolyn From soliver at nrao.edu Fri Oct 18 18:00:00 2002 From: soliver at nrao.edu (Stacy Oliver) Date: Fri, 18 Oct 2002 15:00:00 -0700 Subject: [alma_na] [almanews] ALMA Memos 434 Revision Released Message-ID: ALMA MEMO #434 Load Calibration at Millimeter and Submillimeter Wavelengths Jeff Mangum (NRAO Tucson) Revised 2002/10/18 Original 2002/09/12 Keywords: Calibration Accurate amplitude calibration at millimeter and submillimeter wavelengths is a difficult goal to achieve due to the temporal variability of the emissive and absorptive properties of the Earth's atmosphere and the lack of an accurate astronomical flux standard. The difficulties with deriving a uniform amplitude calibration system has resulted in the three step calibration process used at millimeter and submillimeter single dishes and interferometers. The second step in this process involves the chopper wheel calibration technique. Chopper wheel calibration is used to derive the antenna temperature of an astronomical source corrected for atmospheric extinction. An analysis of the uncertainties in three variants of this technique, two which use a single calibrated load and a third which uses two calibrated loads, has been derived. The conclusion of this analysis is that the one-load chopper calibration systems are more uncertain than the two-load chopper calibration system. This is especially true at submillimeter wavelengths. The main reason for the larger uncertainty of the one-load chopper calibration systems is the fact that they require a knowledge of the mean atmospheric temperature, which is inherently difficult to obtain. Of the two calibration systems, the two-load chopper system has the potential for reaching a calibration accuracy of approximately 1% for all bands, as specified for the ALMA receiving systems. ALMA Memo 434 has been revised as of Oct 17, 2002. To view or downloaded the revised version, please use the following links: View a pdf of revised ALMA Memo #434. http://alma.aoc.nrao.edu/memos/html-memos/alma435/memo435vb.pdf Download a postscript of revised ALMA Memo #434. http://alma.aoc.nrao.edu/memos/html-memos/alma435/memo435vb.pdf Download a zipped, postscript of revised ALMA Memo #434. http://alma.aoc.nrao.edu/memos/html-memos/alma435/memo435vb.pdf _______________________________________________ Almanews mailing list Almanews at listmgr.cv.nrao.edu http://listmgr.cv.nrao.edu/mailman/listinfo/almanews From cwhite at nrao.edu Mon Oct 21 10:37:52 2002 From: cwhite at nrao.edu (Carolyn White) Date: Mon, 21 Oct 2002 10:37:52 -0400 Subject: [alma_na] ALMA NA DH Meeting Canceled Message-ID: <3DB41140.8010401@nrao.edu> The ALMA NA DH Meeting has been canceled for today. Carolyn From tedandstacy at yahoo.com Mon Oct 21 05:49:55 2002 From: tedandstacy at yahoo.com (Ted or Stacy Oliver) Date: Mon, 21 Oct 2002 02:49:55 -0700 (PDT) Subject: [alma_na] [almanews]Correction of links to revised ALMA Memo 434 Message-ID: <20021021094955.96845.qmail@web12406.mail.yahoo.com> ***Please see corrected links below for access to revised ALMA memo 434.*** ALMA MEMO #434 Load Calibration at Millimeter and Submillimeter Wavelengths Jeff Mangum (NRAO Tucson) Revised 2002/10/18 Original 2002/09/12 Keywords: Calibration Accurate amplitude calibration at millimeter and submillimeter wavelengths is a difficult goal to achieve due to the temporal variability of the emissive and absorptive properties of the Earth's atmosphere and the lack of an accurate astronomical flux standard. The difficulties with deriving a uniform amplitude calibration system has resulted in the three step calibration process used at millimeter and submillimeter single dishes and interferometers. The second step in this process involves the chopper wheel calibration technique. Chopper wheel calibration is used to derive the antenna temperature of an astronomical source corrected for atmospheric extinction. An analysis of the uncertainties in three variants of this technique, two which use a single calibrated load and a third which uses two calibrated loads, has been derived. The conclusion of this analysis is that the one-load chopper calibration systems are more uncertain than the two-load chopper calibration system. This is especially true at submillimeter wavelengths. The main reason for the larger uncertainty of the one-load chopper calibration systems is the fact that they require a knowledge of the mean atmospheric temperature, which is inherently difficult to obtain. Of the two calibration systems, the two-load chopper system has the potential for reaching a calibration accuracy of approximately 1% for all bands, as specified for the ALMA receiving systems. ALMA Memo 434 has been revised as of Oct 17, 2002. To view or downloaded the revised version, please use the following links: View a pdf of revised ALMA Memo #434. http://alma.aoc.nrao.edu/memos/html-memos/alma434/memo434vb.pdf Download a postscript of revised ALMA Memo #434. http://alma.aoc.nrao.edu/memos/html-memos/alma434/memo434vb.pdf Download a zipped, postscript of revised ALMA Memo #434. http://alma.aoc.nrao.edu/memos/html-memos/alma434/memo434vb.pdf __________________________________________________ Do you Yahoo!? Y! Web Hosting - Let the expert host your web site http://webhosting.yahoo.com/ _______________________________________________ Almanews mailing list Almanews at listmgr.cv.nrao.edu http://listmgr.cv.nrao.edu/mailman/listinfo/almanews From cwhite at nrao.edu Fri Oct 25 15:47:49 2002 From: cwhite at nrao.edu (Carolyn White) Date: Fri, 25 Oct 2002 15:47:49 -0400 Subject: [alma_na] From the JAO Message-ID: <3DB99FE5.6060307@nrao.edu> NOTICE The JAO/IPT Meeting scheduled for next Monday, October 28, has been canceled. _______________________________ ANNOUNCEMENT The JAO is pleased to announce the appointment of Dick Sramek as Lead of the Systems Engineering IPT. Dick, a long-time member of the NRAO staff, has been serving as the Lead of the Back End IPT. Clint Janes, who has been head of VLA/VLBA Electronics, will be serving as Acting Lead of the Back End IPT. We are very happy to that Dick and Clint are taking over these responsibilities, and look forward to working with them. Paul Vanden Bout for the JAO