No Streak/missile intervention (as thats part of what Angel does and Angel doesnt come into the game for two years - or it becomes experimental tech for Draconis Combine after the battle of Luthien).
references:
http://www.sarna.net...rdian_ECM_Suite
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Affected systems include Artemis IV, C3 and C3i Computer networks, and Narc Missile Beacons. A Guardian can jam a Beagle Active Probe (or its Clan equivalent), but the probe-equipped unit will be aware of the jamming.
http://www.sarna.net/wiki/Angel_ECM
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Within its 6 hex radius of effect, the Angel suite completely blocks the following systems on enemy units: Artemis IV, Artemis V, Beagle Active Probes, Bloodhound Active Probes and their Clan equivalents, C3 Master Computers and C3 Slaves, Streak Missile Launchers and Narc missile beacons. Streak missiles may be fired at units affected by the device, but they function as standard missiles.
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Development of the Angel began in the Draconis Combine shortly after the Battle of Luthien, but despite assistance from ComStar, cost overruns and internal problems within both powers delayed its widespread deployment.
What we have now is a combination of two pieces of equipment (one that wont even be invented -if the game is set in 3050- yet). Just unseperate the mistake and make it do what its supposed to do.
Or stop pretending you want to base the game on TT and toss the TT stuff out already and just be honest about it