AIPS Memos

These are listed in order of date released. Hint: the most interesting ones are probably near the end. All the memos are listed in this text file.

For PostScript documents larger than 100,000 bytes, we provide links for both the regular document, and a GNU Zipped version. Generally, the latter will be a lot smaller (maybe as much as 20 times) but your browser must be capable of performing the GNU unzip (gunzip) operation at the other end. Browsers such as NCSA Mosaic (at least 2.7b1 for X11) and Netscape can do this automatically if your system has gzip and gunzip installed. Windows users may want to use a recent version of winzip or pkzip; these products can generally handle GNU zipped files.

• VLA 131: 1979/12: The Effects of Various Convolving Functions on Aliasing and Relative Signal-to-Noise Ratios Eric W. Greisen, NRAO (pdf, 1807868 bytes).
• 27: 1983/05/20: Non-Linear Coordinate Systems in AIPS (Corrected and Revised 1983/11/15) Eric W. Greisen, NRAO (ps, 2037575 bytes; Gzipped version 105874 bytes).
• 33: 1985/01/30: Gridding Synthesis Data on Vector Machines Donald C. Wells and William D. Cotton, NRAO (runoff, 70845 bytes).
• 35: 1985/06/01: AIPS GRIPES Procedures Donald C. Wells, Eric W. Greisen, and Nancy D. Wiener, NRAO (runoff, 46297 bytes).
• 39: 1986/01/25: Shareable Images for AIPS under VMS Pat Moore and Gary Fickling, NRAO (ps, 62163 bytes).
• 46: 1986/05/20: Additional Non-linear Coordinates Eric W. Greisen, NRAO (ps, 1066320 bytes; Gzipped version 111436 bytes).
• 51: 1987/05/15: The NRAO AIPS Project - A Summary Alan H. Bridle, NRAO (text, 9849 bytes).
• 54: 1987/11/16: The MAIL-REMINDER Utility for VAX/VMS Pat Murphy, NRAO (text, 32127 bytes).
• 61: 1988/09/12: The Astronomical Image Processing System Eric W. Greisen, NRAO (ps, 189404 bytes; Gzipped version 57530 bytes); excellent intro to the AIPS system.
• 62: 1989/08/31: The AIPS Wishlist Eric W. Greisen (ps, 172216 bytes; Gzipped version 53938 bytes).
• 65: 1990/07/16: Installing AIPS on an IBM RISC SYS6000 and Performance Results for Convex C220 and Sun Sparc Computers Eric W. Greisen and Mark Calabretta, AUSTRALIA TELESCOPE (text, 20161 bytes).
• 66: 1990/08/22: An Overview of the AIPS TV Servers Chris Flatters, NRAO (revised extensively but not updated for 15APR92 and later releases; ps, 159878 bytes; Gzipped version 48813 bytes)).
• 67: 1990/11/28: AIPS DDT benchmark results for Sun's SPARCstation 2GX (SUN4/75) Mark Calabretta, Henrietta May, Australia Telescope National Facility (text, 7909 bytes).
• 68: 1991/04/04: Summary of AIPS UV-data Calibration from VLA Arcive tape to a UV FITS tape Glen Langston, NRAO (ps, 91669 bytes).
• 69: 1991/03/28: The 1991 AIPS Site Directory Alan Bridle and Joanne Nance, NRAO (ps, 326893 bytes; Gzipped version 90518 bytes).
• 70: 1991/04/24: The 1990 AIPS Site Survey (HTML format, also available in WordPerfect binary Format) Alan Bridle and Joanne Nance, NRAO (WP doc is 233572 bytes).
• 71: 1991/04/08: A Comparison of DDT results: IBM RS/6000 and Convex C-1 Patrick P. Murphy, NRAO (ps, 80740 bytes).
• 72: 1991/05/07: AIPS Imaging and Self-Calibration: MAPIT Glen Langston, NRAO (ps, 188455 bytes; Gzipped version 58622 bytes).
• 73: 1991/05/16: AIPS DDT History Glen Langston, Pat Murphy and Dean Schlemmer, NRAO (ps, 172967 bytes; Gzipped version 49040 bytes).
• 74: 1991/08/08: AIPS at the Australia Telescope National Facility Mark Calabretta, ATNF (text, 72592 bytes).
• 75: 1991/09/23: 15APR91 DDT Results on a Sun IPC, a Sun Sparcstation 2, a Convex C1, and an IBM RS/6000 Model 550 Brian Glendenning & Gareth Hunt, NRAO (ps, 52350 bytes).
• 76: 1991/11/27: Summary of AIPS Continuum UV-data Calibration Glen Langston, NRAO (ps, 99638 bytes).
• 77: 1992/09/03: Summary of DDT Accuracy Results Ernest Allen & Glen Langston, NRAO (ps, 131270 bytes; Gzipped version 37673 bytes).
• 78: 1992/06/01: Object Oriented Programming in AIPS Fortran (OOPS) W.D. Cotton, NRAO (ps, 183914 bytes) Updated version also available (ps, 306711 bytes; Gzipped version 54172 bytes).
• 79: 1992/06/09: Polarization Calibration of VLBI Data W.D. Cotton, NRAO (ps, 196541 bytes; Gzipped version 58810 bytes).
• 80: 1992/06/30: Remote Tapes in AIPS Eric W. Greisen, NRAO (ps, 119776 bytes; Gzipped version 34708 bytes).
• 81: 1992/08/26: Tape and TV Performance in AIPS Eric W. Greisen, NRAO (ps, 66341 bytes).
• 82: 1992/09/24: Replacing the Convexes- New Color Algorithms in AIPS Eric W. Greisen, NRAO (ps, 94055 bytes).
• 83: 1992/12/14: Dual Libraries and Binaries in AIPSPatrick P. Murphy, NRAO (revised). (ps, 70237 bytes).
• 84: 1993/11/12: A Proposed Package to Support the Use of the X-Window System in AIPS tasks Chris Flatters, NRAO (ps, 80211 bytes).
• 85: 1994/02/09: DDT Revised and AIPSMark(93) Measurements Eric W. Greisen, NRAO (ps, 151013 bytes; Gzipped version 48028 bytes).
• 86: 1994/03/16: Widefield Polarization Correction of VLA Snapshot Images at 1.4 GHz W. D. Cotton, NRAO (ps, 222979 bytes; Gzipped version 61567 bytes).
• 87: 1994/04/05: The NRAO AIPS Project -- a Summary Alan H. Bridle, Eric W. Greisen, NRAO (ps, 63027 bytes).
• 88: 1994/05/16 The AIPS Gripes Database , Originally 1992/02/20, W. D. Cotton and Dean Schlemmer (both NRAO); this version revised by Eric Greisen (ps, 164506 bytes; Gzipped version 49276 bytes).
• 89: 1994/11/17 Baseline-Oriented Fringe Searches in AIPS , Chris Flatters (NRAO) (ps, 121486 bytes; Gzipped version 36944 bytes).
• 90: 1995/07/30 Delay decorrelation corrections for VLBA data within AIPS, A. J. Kemball (NRAO) (ps, 247619 bytes; Gzipped version 50431 bytes ).
• 91: 1995/12/12 AIPS Benchmarks on the Sparc Ultra 1 and 2, Patrick P. Murphy (NRAO) (ps, 55875 bytes).
• 92: 1996/10/01 Errors in Two Dimensional Gaussian Fits, L. Kogan (NRAO) (ps, 103347 bytes; Gzipped version 29956 bytes).
• 93: 1997/01/29 Position angle of the VSOP antenna feed, L. Kogan (NRAO) (ps, 204045 bytes; Gzipped version 35761 bytes)
• 94: 1997/01/29 AIPS Benchmarks for the Silicon Graphics Origin200, Athol Kemball and Chris Flatters (NRAO) (ps, 71937 bytes).
• 95: 1997/08/29 AIPS/AIPS++ INTEROPERABILITY, Athol Kemball (NRAO) (ps, 95429 bytes).
• 96: 1997/10/9 AIPS on an ALPHA AXP Clone, Robert L. Millner, Patrick P. Murphy, and Jeffrey A. Uphoff (NRAO) (ps, 45403 bytes).
• 97: 1997/10/14 Test of Errors of the Fitting Paramenters at Gaussian Fitting task JMFIT, L. Kogan (NRAO) (ps, 78818 bytes).
• 98: 1997/11/19 AIPSTerminal for Linux PC's, Robert L. Millner and Patrick P. Murphy (NRAO) (ps, 48379 bytes).
• 99: 1998/05/29, Multiple TV Servers on a Single Host, Patrick P. Murphy (NRAO) (HTML - experimental!). Also available in Postscript (color, 309035 bytes).
• 100: 1998/07/27: The Creation of AIPS Eric W. Greisen, NRAO (ps, 20 Megabytes; Gzipped version 2 Megabytes).
• 101: 1998/10/08: The Calculation of SNR in KRING's FFT stage Ketan M. Desai, (NRAO) (ps, 203535 bytes).
• 102: 1998/12/03: The FITS Interferometry Data Interchange Format Chris Flatters, (NRAO) (ps, 432881 bytes).
• 103: 2000/03/21: Weighting data in AIPS Ketan M. Desai, (NRAO) (ps, 70198 bytes).
• 104: 2000/09/08: Y2K, a new DDT, and AIPSMark(00) Measurements Eric W. Greisen, (NRAO) (ps, 108954 bytes).
• 105: 2001/02/28, 2001/04/26 (Version 2): AIPS Procedures for Initial VLBA Data Reduction Jim Ulvestad, Eric Greisen, Amy Mioduszewski (NRAO) (ps, 149060 bytes).
• 106: 2001/06/06: Making Movies from Radio Astronomical Images with AIPS C.C. Cheung, D.C. Homan, J.F.C. Wardle, D.H. Roberts, (Brandeis University) (ps, 118507 bytes).
• 107: 2002/04/08: KRING versus FRING Tests Amy J. Mioduszewski (NRAO) (ps, 359270 bytes)
• 108: 2003/01/21: Weights for VLA Data Bryan J. Butler, NRAO (ps 151585 bytes)
• 109: 2004/01/20: Using DVDs with AIPS Greg Taylor, Eric W. Greisen (ps, 73076 bytes)
• 110: Revised 2009/10/21, 2004/08/31: Strategy for Removing Tropospheric and Clock Errors using DELZN Amy J. Mioduszewski (ps, 675042 bytes). Also available in gzipped form (204621 bytes).
• 111: 2005/01/08: ATMCA: Phase Referencing using more than one Calibrator Edward Fomalont and Leonid Kogan (ps, 4044305 bytes); also as gzipped ps (229170 bytes)
• 112: 2007/03/19: Capabilities of the VLA pipeline in AIPS Lorant Sjouwerman (ps, 245441 bytes)
• 113: 2009/05/22: Faceted imaging in AIPS Leonid Kogan & Eric W Greisen (ps, 1169878 bytes); also gzipped (ps.gz, 308229 bytes) and pdf (pdf, 497238 bytes)
• 114: 2022/07/19: The FITS Interferometry Data Interchange Convention Eric W Greisen (ps, 960456 bytes); also gzipped (ps.gz, 417893 bytes) and pdf (pdf, 436808 bytes). Memo 114 uses color to distinguish changes from prior conventions.
• 115: 2009/06/29: Auto-boxing for Clean in AIPS Eric W Greisen (ps, 2638936 bytes); also gzipped (ps.gz, 435453 bytes) and pdf (pdf, 125531 bytes)
• 116: 2010/06/22: RFI Mitigation in AIPS; the new task UVRFI Leonid Kogan & Fraser Owen (ps, 796846 bytes); also gzipped (ps.gz, 218818 bytes) and pdf (pdf, 232971 bytes)
• 117: 2024/11/01: AIPS FITS File Format (revised) Eric W. Greisen (ps, 1621355 bytes); also gzipped (ps.gz, 616976 bytes) and pdf (pdf, 915435 bytes). The Tex version (text, 442854 bytes) is also available and may be helpful in finding things.
• 118:2017/11/08: Modeling Spectral Cubes in AIPS Eric W. Greisen (gzipped ps, 1877667 bytes); also pdf (pdf, 1268026 bytes)
• 119: 2014/12/11: TVSAD: interactive search and destroy Eric W. Greisen (gzipped ps, 1428787 bytes); also pdf (pdf, 267034 bytes)
• 120: 2017/07/22 revision: Exploring Image Cubes in AIPS Eric W. Greisen (gzipped ps, 2135861 bytes); also pdf (pdf, 747282 bytes)
• 121: 2016/09/12: Editing on a uv grid in AIPS Eric W. Greisen (gzipped ps, 929427 bytes); also pdf (pdf, 412836 bytes)
• 122:2017/03/07: Modeling Absorption-line Cubes in AIPS Eric W. Greisen (gzipped ps, 917673 bytes); also pdf (pdf, 570582 bytes)
• 123:2024/12/11: New Pulse-cal Capabilities for VLBI in AIPS Eric W. Greisen (gzipped ps, 889306 bytes); also pdf (pdf, 830534 bytes) and ps (ps, 13723627 bytes)
• 124:2018/11/15: Further Exploration of Image Cubes in AIPS Eric W. Greisen (gzipped ps, 2316139 bytes); also pdf (pdf, 394353 bytes)
• 125:2024/04/16: Post-Correlation Basis Conversion in AIPS Rick Perley & Eric W. Greisen (gzipped ps, 685049 bytes); also pdf (pdf, 577325 bytes)