Frequency and Wavelength Frequency in MHz with VoP and wavelength in meters and feet & inches			Impedance Mismatch, Loss, and SWR A perfect impedance match is not that important in HF radio astronomy
	Phased Array Delay Cable Length Off-zenith angle or elevation angle to delay cable length			Phased Array Element Count to Approximate Directivity You can never have too many elements
	Directivity and Effective Aperture How big is an antenna, really?			Frequency to Galactic Background Galactic background antenna temperature in kK for a given frequency in MHz
	Flux Density and Antenna Temperature Source flux density to and from antenna temperature			Noise Temperature, Power, and Voltage Just what it says
	Voltage and Power RMS, peak-to-peak, dBm, and all that			Noise Factor and Noise Figure How noisy is that receiver?
	Attenuated Noise Source Output Temperature Output temperature versus attenuation			Excess Noise Ratio How hot is that noise source?
	Minimum Detectable Signal How low can you go?			Angular Separation Anglular separation between two points on the sphere
	Voltage Divider What resistor do you need and at what power rating?			Digitizer Parameter Comparison RBW, time & freq resolution, data rates, and all that jazz