Speed of a Satellite in Circular Orbit, Orbital Velocity, Period, Centripetal Force, Physics Problem - YouTube
orbital mechanics - Point Ahead Angle and Doppler Shift Frequency Changes Calculation with the tangential/radial velocity component for Inter- Satellite Link - Space Exploration Stack Exchange
Calculations for Space Communication
HamCalc v1.3 - Resource Detail - The DXZone.com
Nova's Frequency Display
Propagation Delay Calculator - Delay between Two Routers
Wavelength to Frequency Calculator - everything RF