Scope and Contents

Comprises sheets and drum charts describing layouts of data cards for Astrolabe Reduction computer program 177.

Scope and Contents

Comprises notes, formulae and notations, and outlines describing computer program 177 for reduction of astrolabe observations. Also includes a letter from L. S. T. Symms to Mr Sadler requesting approval for the program, with a note back giving permission.

Scope and Contents

Comprises print-outs of results from test packs for computer program 177, with handwritten annotations.

Scope and Contents

Comprises flow diagrams showing the process of computer programme 177, used for the reduction of Astrolabe results.

Note: one of the flowcharts is made up of 2 sheets of paper attached together with adhesive tape. Handle with care.

Scope and Contents

Comprises punch cards, annotated print-outs, and program sheets for computer program 177.

Scope and Contents

Comprises photocopies of papers titled 'Summary of Cape Astrolabe Reduction Scheme' and 'Preliminary Analysis of Cape Astrolabe Results', with handwritten annotations.

Scope and Contents

Comprises tabulated figures, charts, notes and calculations relating to clock error at Herstmonceux Astrolabe.

Scope and Contents

Comprises tabulated figures, charts, and notes concerning correlation of clock error residuals with wind direction; observer corrections; personality in latitude; group and empirical corrections; astrolabe personality (clock error); and observer personality.

Scope and Contents

Comprises photocopy of tabulated data titled 'Herstmonceux PZT [Photographic Zenith Tube] Mean Latitude Observations of 1st 50'.

Scope and Contents

Comprises tabulated data and graphs showing the variation of zenith distance with observers, azimuth, magnitude and colour.

Scope and Contents

Comprises sets handwritten papers titled 'Checking 287/A Output'; 'Relation of Astrolabe Time Results to ZUO'; 'Astrolabe Time Results'; 'Herstmonceux Astrolabe'; and 'Theory and Method of Reduction of Astrolabe Observations'. Also includes list of files at the Cape.

Scope and Contents

Comprises charts, calculations and tabulated data titled 'Check on Mean Values of ∆31, ∆32, ∆33'; 'Correlation of 1/2 Σ R1 min A with n'; and 'Sums of Residuals of Basic Stars (Run G)'.

Scope and Contents

Comprises two sets of tabulated data, including information such as ZUO-SID, wind direction and wind velocity.

Scope and Contents Comprises handwritten, indexed notebook on the theory and practice for the reduction of observations made with the Herstmonceux Astrolabe (OPL 9). The notebook is labelled 'R. Wallis'. Subjects include: developing and reading films; data cards; runs Z, A, M and N; weekly routine; position of Astrolabe; drawing the solution; obtaining GBR/UTO; weights and latitude; weekly sheets; test packs; instrument; observed zenith distance; corrections; equations; solutions weighting; least...

Scope and Contents

Comprises sets of handwritten calculations in a folder labelled 'Prism Angle/Temp./Time'. The first set of calculations is titled 'Investigation of Prism Angle'.

Scope and Contents

Comprises papers and images in a folder labelled 'OPL Astrolabe'. The folder contains papers titled 'Astrolabe: Part I, Installation and Working', a french translation of these instructions titled 'Astrolabe Impersonnel A. Danjon: Ière Partie, Mise en Station et Manoeuvre'; and labelled printed photographs of the astrolabe.