Looking for the Wndsn store? This way, please.

Wndsn Calculators

Companion tools to Wndsn Quadrant Telemeters: Low tech, high utility graphical distance computers from the Wndsn applied science lab.

Range calculator
Measure distance from angular size in degrees, mil, or moa, e.g. distance to object of known dimension(s), depth of a well, height of building, etc.
Elevation calculator
Measure altitude difference relative to shared base, e.g. the distance to a lighthouse of known height, measured from a skyscraper of unknown height, or the altitude of a structure on a mountain, measured from a valley, or the distance and altitude of an airplane of known size.

[The calculators are RESTful, which means that one can bookmark calculations and their results as well as return JSON, XML, or CSV representations for use in other apps.]

Tycho Brahe

A Danish astronomer, Tycho Brahe (1546 – 1601) was known for his comprehensive astronomical and planetary observations. Tycho's view of science was driven by his passion for accurate observations, and the quest for improved instruments of measurement drove his life's work. He was the last of the major naked-eye astronomers, working without telescopes for his observations.

Well known in his lifetime as an astronomer, astrologer and alchemist, he has been described as "the first competent mind in modern astronomy to feel ardently the passion for exact empirical facts." His observations were some five times more accurate than the best available observations at the time.

Yet in this my stars were not Mercury as morning star in the angle of the seventh house, in quartile with Mars, but they were Copernicus, they were Tycho Brahe, without whose books of observations everything which has now been brought by me into the brightest daylight would lie buried in darkness.

Johannes Kepler

See also