The science of measurement, embracing both experimental and theoretical determinations at any level of uncertainty in any field of science and technology.
Wndsn Quadrant Telemeters
Wndsn Quadrant Telemeters offer various means of measuring angular size, as well as a graphical computer providing functions to process or convert the measured values. Their purpose is to help you navigate using known landmarks or astronomical features, to get a "second opinion" to cross-check values obtained with different means, or in austere situations when other methods fail or are unavailable.
Our current flagship, a multitool for emergency navigation, for training and education, as a visualization tool or to confirm results from other instruments; the Wndsn Quadrant Telemeter is a naked-eye observation powerhouse of critical functions in one durable, low tech, high utility instrument that can be brought anywhere and belongs in every instructor's and survival kit.
The frontside features a rangefinder with included calculator; the backside features functions derived from ancient astrolabes; a degree and slope quadrant, a shadow square, as well as sine and cosine arcs and an inclinometer scale.
Using a Wndsn Quadrant Telemeter (qTM) to determine latitude (at night with Polaris), then calculate declination of the day with the respective arc, and a measurement of the Sun altitude (backsighting), one can derive at least 18 data points -- calculating all of them directly on the quadrant.
Documentation, tutorials, and the instruments: