# Calculators, Equations and other Stuff

Here are some links to Calculators, link to Equations and their derivation and links to pages that don't have a dedicated blog page yet or are more an addition to some pages than their own topic.

## Calculators

Calculators and Units Converters
A variety of calculators collected on one place.

Calculation and visualisation of earth curvature related properties like hidden parts for globe and flat earth.

Simulation of Atmospheric Refraction
The interactive Refraction Simulator on this page renders scenes as seen on atmospheric conditions you can provide.

Display Geo Data
App to display ECEF coordinates gathered with GNSS. Default shows Lake Ponchartrain Causeway overlayed with Soundly's image.

Rainy Lake Experiment: WGS84 Calculator
WGS84 based transformations of vectors between ECEF cartesian and geodetic coordinates (lat,long,height).

(WGS84 Calculator)
For calculations in the WGS84 ellipsoid model of the earth

Earth Gravity Calculator
Calculates the effective gravitational acceleration, the pure gravitational acceleration and the centrifugal acceleration for any point on the Reference Ellipsoid or above.

Creating Flight Plans for Flat Earth
This App lets you create a Flight Plan based on the Flat Earth Model and view the calculated track on flat earth and globe.

Distances on Globe and Flat Earth
Calculate the shortest distance between two points for globe and flat earth.

Centrifugal and Gravitational Acceleration in an Aircraft
Calculation of the Eötvös effect on a weight in a aircraft, taking speed, direction, latitude and altitude into account.

Communication Path Calculator (RF Link Budget) This calculator determines the amount of transmitted power received and delivered to the input of a radio receiver in a RF communication link that has signal dissipation losses in the transmitter and receiver hardware as well as signal attenuation as the RF signal energy travels and disperses along its propagation path. The transmitted power received together with the receiver sensitivity determines if the communication link is successful or fails. Author George Hnatiuk.

## Derivations of Equations

Eight Inches per Miles squared Formula Derivation
Calculating the accuracy of the approximation 8" per miles squared equation. Derivation of the exact and approx. equation.

Rainy Lake Experiment: Equations
Derivation of curvature drop, horizon distance, refraction angle and lift.

Deriving Equations for Atmospheric Refraction
Derivation of equations for terrestrial atmospheric refraction from basic physical laws.

WGS84 Coordinate System
Equations to transform vectors between ECEF cartesian and geodetic coordinates.

Globe Arc Projection to Flat Earth
Equations and Script to project a circle on a globe to the flat earth

Gravity on an infinite Flat Earth Plane
Derivation of equations to calculate gravity for an infinite plane

Barometric Formula
Equations for pressure, density and temperature for the International Standard Atmosphere

## Other Stuff

Strong Refraction Simulation and Reality for 2 Oil Platforms
I managed to reproduce a rare refraction situation that gave raise to discussions for flat earthers.

Curved Horizon from 46,000 ft through a HUD, CurvApp overlay
The horizon drop and the curvature of the horizon match exactly the prediction of the Curvature App

Horizon and Refraction explained
Visialisation of apparent horizon at different looming confitions

Patents for Erection Mechanisms of Attitude Indicators (AI)
Collection of patents of erection mechanisms for mechanical attitude indicators.