FIR
See also: fir, fir-, and fír
English
Adjective
FIR (not comparable)
- (signal processing, of a filter) Initialism of finite impulse response; that has impulse response (or response to any finite length input) of finite duration.
Noun
FIR (countable and uncountable, plural FIRs)
- (aviation) Initialism of flight information region; a specified region of airspace in which a flight information service (FIS) and an alerting service (ALRS) are provided
- Initialism of first information report.
- (uncountable) Abbreviation of far infrared or far infrared radiation.
Related terms
flight information region
- FIS
infrared
- FUV (far-UV)
- IR
- LWIR
- MIR
- MWIR
- NIR
- SWIR
- VLWIR
- VSWIR
Anagrams
- Fri, IFR, IRF, RFI, RIF, Rif, rif