OVERVIEW: Flare salvo (single spectral) for aircraft is a defensive countermeasure involving the rapid deployment of multiple flares that emit intense infrared (IR) energy within a single wavelength band. This tactic is intended to mislead incoming heat-seeking missiles by creating multiple false IR targets.

DETAILS: These flares are ejected from onboard dispensers in quick succession, forming a cloud of high-temperature IR sources behind the aircraft. flares burns brightly in a specific spectral range—typically mid-wave IR (3–5 µm) or long-wave IR (8–12 µm) chosen based on the expected missile seeker sensitivity. The salvo pattern increases the chances of seducing a missile away from the aircraft, especially during high-threat engagements or missile launch detection. Single spectral flares are most effective against older-generation IR-guided missiles that rely on intensity-only homing and lack counter-countermeasure logic.

ROLE SUMMARY:
Category: Airborne Countermeasure
Primary Use: Infrared-guided missile deception
Function: Dispensing multiple single-band IR flares to distract missile seekers
Strong Against: Early-generation IR-guided missiles, intensity-tracking seekers
Weak Against: Imaging IR seekers, multi-spectral guidance, IRCCM-capable threats
Platform: Fighters, bombers, transports, and rotary-wing aircraft with flare dispensers
Integration: Operates via onboard defensive aid systems (DAS) or manual pilot activation

SOURCE:
Janes Aircraft Survivability Equipment
https://en.wikipedia.org/wiki/Infrared_countermeasure