• TPOINT: The TPOINT package is available as an executable system and as source code. The source code enables a library (TPTLIB) to be built, and this can be used to add TPOINT functionality to the user's applications.

  The executable "pro" system, for either MS Windows or a range of Unix platforms, consists of a CD-ROM and a 100-page manual. Each copy is licensed to an individual user and entitles him or her to analyze data from a specified telescope (in professional sizes) or all the telescopes at the user's observing site (typical amateur sizes). The license fee is aperture dependent.

• SLALIB: The SLALIB library provides the software developer with a wide range of positional-astronomy functions.

  SLALIB, either the Tpoint Software C version or the earlier Fortran version from the UK Starlink Project (1979-2005), is widely used by professional astronomers. It is at the heart of almost all the control systems for telescopes over 3 meter aperture developed during the past decade. The library comprises 216 functions, using accurate and up to date algorithms.

  SLALIB is licensed in ANSI C source code form.

• TCSpk: The TCSpk library is aimed at developers of telescope or antenna control systems for professional astronomy and space applications. It provides extremely accurate and sophisticated algorithms for controlling pointing and tracking, including provision for autoguiders, tip-tilt optics and instrument rotators.

  TCSpk is licensed in ANSI C source code form.

• IPHASE: This is a TPOINT-like package for analyzing optical path-length in 2-telescope interferometers. Given delay-line readings for different stars, the IPHASE package determines the geometry of the interferometer, including the relative locations of the two telescopes or antennae and various runout effects in their mountings. The interferometer control system can use this information to improve the accuracy with which it can set the delay lines, speeding up fringe acquisition, especially for faint objects.

  IPHASE is a highly specialized tool, of interest to professional observatories which operate, or are developing, interferometer systems.

  Like TPOINT, a range of versions is available, including executables for MS Windows or Unix and source licenses. The IPHASE executables are free-standing, but TPOINT source code (or a subset thereof) is a prerequisite for the other IPHASE products.

• Consulting: Tpoint Software can offer state-of-the-art expertise in telescope pointing and tracking algorithms and in many other areas of positional-astronomy and astrometry.

  Any scale of problem can be addressed, from a few hundred lines of code implementing a pointing kernel up to complete telescope control systems. Studies of individual telescopes can also be undertaken.

Prices are available on application. In general, executables are relatively inexpensive. Source code, of interest to major projects which need to guarantee long-term in-house support, is more expensive and is licensed on strict non-disclosure terms.

Separate licensing arrangements exist for, respectively, (i) non-profit astronomy institutes and individuals, and (ii) telescope manufacturing companies and other commercial users.

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