2018A Starlink Release
Starlink Software Collection — 2018A Release Notes
Highlights
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The new HDS-V5 data format (which uses HDF5) is now available. In this release the default will be to write
all files as HDS-V4, unless the environmental variable HDS_VERSION is set to 5. This is described in Jenness 2015
(https://ui.adsabs.harvard.edu/#abs/2015A&C....12..221J/abstract|2015A&C....12..221). We are planning to make this
file format the default starting with our next release, so we would please request any issues or comments be sent on
to us: either on the https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=STARLINK|Starlink users' mailing list, the
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=STARDEV|Starlink developers' mailing list, or sent directly to EAO
with the helpdesk AT eaobservatory.org email address. -
The ARY library has been converted to C.
-
Perl updated to Version 5.26.1.
-
Further improvements to POL-2 data reduction software, including (experimental) skyloop modes and (experimental)
450 micron reductions. -
Expanded cookbook for heterodyne data reduction, including spectral analysis with SPLAT.
Changes to Applications
CUPID (ascl:1311.007)
- The FINDCLUMPS command now uses a better method for finding elliptical approximations for highly non-elliptical
clumps. The previous method could produce extremely long thin ellipses for such clumps.
GAIA (ascl:1403.024)
- When reading a multiple-line ARD region to extract a spectrum, all newlines and spaces are removed so that it can
be saved. - Key fonts with compound names can now be saved to the configuration of the contour toolbox.
- HTTP request headers should now use the correct line termination.
KAPPA (ascl:1403.022)
- A new estimator, "!FastMed" has been added to COLLAPSE. It offers faster much faster calculation of unweighted
medians. - WCSALIGN can now use a catalogue such as produced by POLPACK to define the reference grid (previously only
an NDF could be used). - The weighting scheme used by ALIGN2D has been changed so that alignment is determined more by the brighter
sections of the map than previously. - In WCSMOSAIC, each input NDF can now have a specified weight in the final mosaic.
- SETAXIS has a new mode that reads the new axis values from the "Data" component of another NDF.
ORAC-DR (ascl:1310.001)
See https://www.eao.hawaii.edu/oracdr/2018AChangeLog for the ORAC-DR 2018A change log.
POLPACK (ascl:1405.014)
- New command POLCONCAT to concatenate multiple vector catalogues.
- New command POLSELECT allows vectors to be selected in various ways, including using an NDF as a mask.
SMURF (ascl:1310.007)
- The dome status has been added to scuba2_index / acsis_index.
- POL2MAP: New parameter "binsize" allows he size of the bins in the final catalogue to be specified.
- POL2MAP: New IP models at 450 um and 850 um.
- POL2MAP: Improve pointing correction.
- POL2MAP: Change default 450 um pixel size to 4 arc-sec.
- POL2MAP: Allow SKYLOOP to be used to create maps rather than MAKEMAP.
- POL2MAP: Allow observations to be weighted on the basis of how similar they are to the mean of the other
observations. - POL2MAP: Allow minor changes in FCF to be detected and corrected when mosaicing observations.
- POL2MAP: An error is now reported if the input data is not all for the same source.
- SKYLOOP: Allow maps made from individual observations to be saved.
- SKYLOOP: Allow data models to be stored in a specified directory rather than the current directory.
SOURCEPLOT
- The included JCMT source catalog has been updated.
SPLAT (ascl:1402.007)
- A bug relating to the receipt of spectra through local URLs via SAMP has been fixed.
- The submillimetre line identifier catalog has been updated.
STILTS (ascl:1105.001)
- Updated to Version 3.1-4.
See http://www.starlink.ac.uk/stilts/sun256/versions.html for the STILTS version history.
TOPCAT (ascl:1101.010)
- Updated to Version 4.6-1.
See http://www.starlink.ac.uk/topcat/sun253/versions.html for the TOPCAT version history.
Changes to Libraries
ARY
- The Fortran ARY library has been completely re-written in C.
AST (ascl:1404.016)
- New function !astActiveObjects returns pointers for all currently active AST objects, filtered by class.
- New function !astCreatedAt returns information about where an object was created.
- The 1astChannel class now uses more precision when writing out floating point values, resulting in
write-read round trips being lossless. - The !FitsChan class has a new attribute "!FitsTol" that specifies the maximum deviation from linearity
allowed for the Mapping from pixel coordinates to intermediate world coordinates when writing out a
FrameSet using FITS-WCS encoding. - !astSimplify will now merge a diagonal !MatrixMap with an adjacent !WinMap to create a modified !WinMap.
- The !FitsChan class has a new attribute "!SipReplace", which can be used to prevent the automatic
replacement of inverse SIP coefficients when a FITS-WCS header including SIP distortion is read. - Improved simplification of !CmpMaps including !WcsMaps.
- The !FitsChan !astWrite method can now create FITS-WCS headers that include SIP distortion keywords,
given a suitable !FrameSet. - A few small memory leaks have been fixed.
- The astRebinSeq function can now use a specified weight with each input data array.
- Improvements to the accuracy of the iterative inverse used by the !PolyMap class.
- Several new string manipulation functions.
GRP
- The maximum length of a group expression has been increased from 255 to 2047 characters.
HDS
- A new package called "hds-v5" has been created that contains a complete re-write of the existing HDS API
using HDF5. The original code that deals with "native" HDS files has been moved to a new package called
"hds-v4". The "hds" package is now simply a layer that chooses whether to call the appropriate function from
hds-v4 or hds-v5. When reading an existing "HDS" file it chooses the package corresponding to the format
of the existing file (either v4 or v5). When creating a new "HDS" file, it chooses the format specified by the
HDS_VERSION environment variable (which currently defaults to v4).
PCS
- C wrappers have been added for more routines.
- Limits on the length of the command line and on the length of individual file paths have been relaxed.
STIL
- Updated to Version 3.3-1.
See http://www.starlink.ac.uk/stil/sun252/history.html for the STIL version history.
CFITSIO
- Updated to current upstream Version 3.43. This includes a security fix that NASA/HEASARC recommended
all CFITSIO users should install. See https://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c/docs/changes2.txt.
Miscellaneous Changes
- The shell "login" and "profile" scripts now add Starlink to the start (rather than the end) of LD_LIBRARY_PATH.
- The shell "login" and "profile" scripts now define ORAC_PERLBIN.
Changes to Cookbooks and Guides
- SC/20 (Heterodyne Data Reduction) expanded to include an illustrated chapter on spectral analysis
(e.g. identification of telluric lines, noise estimation, and line fitting) with SPLAT, and various small corrections
to Chapters 3 and 5 to 8. - SC/21 (SCUBA-2 Data Reduction) was given a spring clean, that includes clarifications, and fixes to typo's
and cross references. - SC/22 (POL-2 Data reduction) updated to match the current software. It has a new chapter on using TOPCAT
with vector catalogues, and example maps created using OBSWEIGHT and SKYLOOP.