= Starlink Software Collection — 2016A Release Notes =

== Highlights ==

 * Support for the 2016 December leap second is included (the previous release will not correctly grid JCMT data taken after December 2016).
 * csh is no longer required to run various applications (including SMURF's makemap command).

== Changes to Applications ==

=== CUPID ===

 * Fixed bug in the Gauss``Clumps algorithm which could cause bright clear clumps to be missed.
 * The message printed when using the Gauss``Clumps algorithm and one or more clumps are rejected is less misleading than it was before.

=== GAIA (ascl:1403.024) ===

 * Added scroll bars around 3D toolbox spectral properties tab.
 * Added the Gaia Satellite all source catalogue to the standard lists (other variants are available as VO downloads).

=== KAPPA (ascl:1403.022) ===

 * Added new WCSADD MAPTYPE "refndf" to copy a frame from another NDF.
 * Added new APERADD parameter MASK which can be used to save an NDF containing a mask showing which pixels were included in the aperture.
 * Added new command ALIGN2D to align 2D images by minimizing the residuals between them.
 * Added new NORMALIZE parameters DRAWMARK and DRAWWIDTH to control plotting of these elements.
 * Improved MFITTREND's handling of line forests, adding new parameters FOREST and HNUMBIN.
 * Fixed bug preventing excess WCS axes being removed by NDFCOPY.

=== ORAC-DR (ascl:1310.001) ===

[[ https://www.eao.hawaii.edu/oracdr/2016AChangeLog | ORAC-DR 2016A change log ]]

=== POLPACK (ascl:1405.014) ===

 * Catalogue rows that contain any Starlink bad values are no longer passed to the GAIA polarimetry toolbox.
 * Fixed bug that caused an ellipsis to be appended to the end of the key title created by POLPLOT, if the Title attribute was set in the key style.
 * POLVEC has a new parameter called REFUPDATE that controls the reference direction used by the output catalogue.
 * Fixed bug in the calculation of the error values in the output catalogue created by POLVEC. Errors may now be generally some what smaller than before. 

=== SMURF (ascl:1310.007) ===

 * Options for despiking of JCMT WVM data added.
 * FTS2SPLIT now generates output file names by appending a number rather than manipulating the subscan field of the name.
 * Added new MAKEMAP dimmconfig parameter flt.ring_mask to control the flagging of samples that suffer from ringing.
 * MAKEMAP now records total exposure time in the output map, using a FITS header called ELAPTIME.
 * Two sets of pointing corrections can now be used in MAKEMAP.
 * Prevented an error being shown when FIT1D parameter PARCOMP is null.
 * Apply map-based despiking to all subarrays other than just the first supplied.
 * Many changes have been made, and continue to be made, to the commands used for POL-2 data reduction. You are advised to download the nightly build from EAO if you intend to reduce POL-2 data. 
 * Fixed bug in extinction calculation that could cause very small random errors in extinction values. 

=== SOURCEPLOT ===

 * The included JCMT source catalog has been updated.

=== SPLAT ===

 * A number of improvements and fixes to the VO services interface.

=== STILTS ===

 * Updated to version v3.0-9.

[[ http://www.starlink.ac.uk/stilts/sun256/versions.html | STILTS version history ]]

=== TOPCAT (ascl:1101.010) ===

 * Updated to version v4.3-5.

[[ http://www.starlink.ac.uk/topcat/sun253/versions.html | TOPCAT version history ]]

== Changes to Libraries ==

=== AST (ascl:1404.016) ===

 * The AST source code is now stored in its own Git``Hub repository, separate to the main Starlink repository.
 * The new configure option "--without-fortran" allows AST to be built without a Fortran compiler being available.
 * Mapping attributes that could previously be changed freely can now only be changed if the mapping has not been cloned or incorporated into another AST object.
 * A new Mapping class — Unit``Norm``Map — has been added, which converts an absolute position vector into a unit vector relative to a specified origin, plus a vector length.
 * Include December 2016 leap second.
 * Fix memory corruption caused by more than 50 calls to astMapPutElemC
 * Change angular constants in AST_PAR include file from single to double precision.
 * Fix bug in astGetRegionBounds that could cause incorrect bounds to be returned for cases where the region crosses a longitude=zero singularity.
 * New Frame method, astAxNorm, to normalise a set of axis values.

=== KAPLIBS ===

 * Prevented insufficient good data in a element from being fatal when using ESTIMATOR=Mode in COLLAPSE.

=== PCS ===

 * No longer defaults to using `csh` for file name expansion.

=== STIL ===

 * Updated to version v3.1-2.

[[ http://www.starlink.ac.uk/stil/sun252/history.html | STIL version history ]]