HOW TO DE­FEAT THE DRONES

EMERG­ING TECH­NOL­OGY OF­FERS AN AR­RAY OF WAYS TO COUNTER A UAS AT­TACK

India Today - - THE BIG STORY - Source: FICCI-E&Y study ‘Coun­ter­ing Rogue Drones’

PRO­TO­COL-BASED INTERDICTI­ON Hack­ing into the drone’s com­mu­ni­ca­tions sys­tem to neu­tralise it

Risk: Calls for early de­tec­tion of the drone

SEN­SOR-BASED INTERDICTI­ON Dis­rupt­ing the UAV’s var­i­ous flight sen­sors— mo­tion sen­sors, gy­ro­scopes, ob­sta­cle avoid­ance sen­sors and flight con­trol func­tions—so that it re­ceives an er­ror sig­nal, forc­ing it to ei­ther crash or ac­ti­vate an in­ter­nal safety ma­noeu­vre to land safely. Or by spoof­ing a GPS sig­nal to force the UAV to change its pre-pro­grammed mis­sion plan

Risk: Kamikaze drones can trig­ger off ex­plo­sives if in­ter­cepted

JAM­MING SIG­NALS

Us­ing jam­mers to dis­rupt the fre­quency link be­tween the drone and its oper­a­tor by gen­er­at­ing large vol­umes of ra­dio fre­quency (RF) out­put. Once the RF link is sev­ered, a UAV will ei­ther de­scend to the ground or ini­ti­ate a re­turn-to-home ma­noeu­vre. Satel­lite jam­ming dis­rupts the UAV’s satel­lite link used for nav­i­ga­tion

Risk: Does not work in the case of au­ton­o­mous drones with pre-fed co­or­di­nates or ter­rain con­tour map­ping data

PHYS­I­CAL INTERDICTI­ON

Bring the UAV down us­ing spe­cialised am­mu­ni­tion. High-en­ergy laser beams can burn them down. Some C-UAS set-ups fire nets at the UAVs to tan­gle up their pro­pel­lers and bring them down

Risk: Can be self-de­feat­ing since a falling UAV is a dan­ger­ous pro­jec­tile

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