Sensitivity Upgrade

THIS PAGE IS OBSOLETE, THE MEMOS ARE NOW ARCHIVED AT THE NRAO LIBRARY.

Memo

 Title Author Date Size
43 A Total Power Digitizer for the VLBA RDBE Keith Morris 2014 Sep 15 463k
42 Description of the VDIF format used by the VLBA, VLA and GBT including the VDIF Extended Data Version 3 definition Walter Brisken, Matt Luce, & Paula Metzner 2013 Nov 13 91k
41 X-cube Soft Switch Command Set Walter Brisken 2013 July 26 90k
40

Investigation of Alternative Disk Drives for Mark5C Modules

Walter Brisken, Frank Schinzel & Bob McGoldrick

 2012 May 9 958k
39 Dual RDBE IF and Channel Assignments Walter Brisken, Matthias Bark 2012 Apr 12 85k
38 Mark5C Voltage and Temperature Measurements Walter Brisken, Bob McGoldrick, Doug Gerrard, Steve Durand 2011 Jul 13 378K
37 Design and Measurement of VLBA C-Band Feed Horn S. Srikanth 2011 Jun 22 76k
36 ESSR Acceptance Plan W.Brisken 2011 Jun 29 67K
35 Test for DBE Frequency Synthesizer Board G. Peck 2011 Mar 10 77k
34 System Temperature Determination with DiFX W. Brisken 2011 Jan 18 204k
33 4-8 GHz C-Band Upgrade: Preliminary Design Review for LO/IF and Monitor & Control V. Dhawan 2011 Jan 11 73k
32 DiFX Pulsar Guide W. Brisken, A. Deller 2010 Dec 5 93k
31 VLBA Station Timing R.C. Walker 2010 Dec 2 59k
30 Enhanced Mark5C Control Specification W. Brisken, M. Bark, H. Ben Frej, C. Walker 2010 Nov 4 65k
29 The VLBA's Transition to Conduant's SDK9 W. Brisken 2010 July 21 65k
28 Some Thoughts on Gain Control in the DBE Era W. Brisken 2010 April 13 123k
27 Monitor Data for the VLBA Sensitivity Upgrade G. Hunt 2010 April 14 113k
26 Test Plan for the VLBA-DiFX Correlator and
Other VLBA Sensitivity Upgrade Equipment 		J. D. Romney, W. F. Brisken, A. T. Deller, S. J. Durand, R. C. Walker 2009 February 26 46k
25 VLBA-DIFX Operations Plan W. Brisken 2009 February 18 213k
24 Mark 5C Hardware Test and Acceptance Plan Memo C. Ruszczyk 2008 October 22 103k
23 A Guide to Software Correlation Using NRAO-DiFX Version 1.1 W. Brisken 2008 September 3 364k
22 The Evolution of Hard Drive Prices Over 2000 Days W. Brisken, J. Romney 2008 July 16 516k
21 Final Report for the VLBA 22 GHZ Amplifier Upgrade Project C. Walker, S. Durand, C. Kutz II, B. Hayward 2008 May 22 375k
20 Difx Operator Interface (DOI) Specification W. Brisken 2008 April 18 117k
19 Mark 5C-, A Proposed Mark 5C Emulator NRAO, MIT Haystack Obs. 2008 January 9 109k
18 Mark5C Software Interface Specification NRAO, MIT Haystack Obs. 2008 January 7 114k
17 Benchmarking DiFX on the Mark5A Cluster and Justification for an Upgrade W. Brisken 2007 November 26 112k
16 The Cost of Software Correlation W. Brisken, A. Deller 2007 October 9 131k
15 Proposal to increase the sensitivity of the VLBA C.Walker, J. Romney, W. Brisken, S. Durand 2007 April 16 738k
14 Impact of DBE Crossover Frequencies C. Walker 2007 April 14 143k
13 Mark 5C Data-Frame Specification Haystack/NRAO 2008 February 19 107k
12 Mark 5C Specification Haystack/NRAO 2008 February 19 120k
11 Options for a VLBA 4-Gbps Upgrade J. Romney 2006 November 16 32k
10 Proposal to Upgrade the 22 GHz Receivers on the VLBA Antennas C. Walker, S. Durand, C. Kutz II, R. Hayward 2007 May 2 311k
4 Mapping the Future of VLBI Science in the U.S. VLBI Future Committee 2004, August 16 4463k
3 VLBA Upgrade: Scientific, Observational, and Technical Requirements J. Romney 2008 September 5 (re-issued) 44k
2 VLBA Upgrade Study J. Romney 2008 September 5 (re-issued) 164k
1 VLBA Sensitivity Upgrade Program and Memo Series J. Romney 2007 April 1 22k

Connect with NRAO

The National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.