Secondary Surveillance Radar
                        
                            GPTKB entity
                        
                    
                Statements (28)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | gptkb:radar | 
| gptkbp:abbreviation | gptkb:SSR | 
| gptkbp:alternativeName | Beacon radar IFF (Identification Friend or Foe) in military context | 
| gptkbp:composedOf | gptkb:Interrogator Transponder | 
| gptkbp:detects | Aircraft transponders | 
| gptkbp:developedBy | Military aviation Civil aviation | 
| gptkbp:enables | gptkb:Mode_S Mode A Mode C | 
| gptkbp:frequency | 1090 MHz 1030 MHz | 
| gptkbp:introducedIn | 1950s | 
| gptkbp:provides | Altitude information Aircraft identification Squawk code | 
| gptkbp:relatedTo | gptkb:Primary_Surveillance_Radar | 
| gptkbp:standardizedBy | gptkb:ICAO | 
| gptkbp:usedFor | gptkb:Surveillance Identification Collision avoidance | 
| gptkbp:usedIn | gptkb:Air_traffic_control | 
| gptkbp:uses | Interrogation and response principle | 
| gptkbp:bfsParent | gptkb:SSR | 
| gptkbp:bfsLayer | 7 | 
| https://www.w3.org/2000/01/rdf-schema#label | Secondary Surveillance Radar |