refe - repa
- refer to data bank
- reference antenna
- reference atmosphere
- reference axis
- reference boresight
- reference data
- reference direction
- reference documentation
- reference earth station
- reference format
- reference frequency
- reference generator
- reference level
- reference light source
- reference line
- reference load
- reference model
- reference oscillator
- reference phase
- reference potential
- reference power supply
- reference pulse
- reference recording
- reference resistance
- reference resistor
- reference seo
- reference signal
- reference source
- reference sync pulses
- reference table
- reference tape
- reference test
- reference tone
- reference voltage
- reference wavemeter
- reflect from the boundary of two media
- reflectance
- reflected light
- reflected power
- reflected ray
