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| {{Status|Canon}} | | {{Era|FOR}} |
| {{AI infobox
| | '''Doppler''' was a [[UNSC]] [[Artificial Intelligence]] construct in [[2552]]. |
| |name=Doppler
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| |image=[[File:FoRInvasion - Doppler.png|300px]]
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| |number=8575
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| |began=Before [[2552]]
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| |ended=[[2552]]
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| |gender=Male programming
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| |description=
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| |color=
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| |affiliation=[[United Nations Space Command]]
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| |function=Space Dock Quartermaster
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| |battles=[[Fall of Reach|Battle of Reach]]}}
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| '''Doppler''' ([[AI serial number]]: '''AI-8575'''), was a [[United Nations Space Command|UNSC]] [[artificial intelligence]]. In [[2552]], he was the Space Dock Quartermaster for [[Gamma Station]] in orbit of [[Reach]]. | |
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| ==Biography==
| | [[AI]] number 8575, Doppler was the Space Dock Quartermaster for [[Reach Station Gamma]] above planet [[Reach]]. Shortly before [[The Battle of Reach]] began in 2552, he alerted [[HIGHCOM]] that the prowler ''[[Circumference]]'' did not delete its NAV logs. It is presumed he then destroyed himself as per the [[Cole Protocol]].<ref>[[Halo: The Fall of Reach]], page 302</ref> |
| On August 29, just prior to the [[Fall of Reach]], Doppler hailed the {{UNSCShip|Circumference}} as it approached the station. However, due to security regarding [[Operation: HYPODERMIC]], which the prowler was a part of, Doppler was told by an ONI official to access Office of Naval Intelligence Instruction ONI-Seven-Eta. The data temporarily scrambled Doppler's memory, causing him to forget about the prowler and about the official who tricked him.<ref>'''[[Halo: Fall of Reach - Invasion]]''', ''Issue 1''</ref> The prowler was then isolated from the [[REACH DOC NET]], preventing Doppler from accessing the ship should he discover it again.
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| As the battle began, though, Doppler discovered Covenant intrusion software that was penetrating the DOC NET, against which his own counter-intrusion measures were ineffective. This software had also discovered the location of the ''Circumference'', the NAV data of which Doppler was unable to delete. The AI sent a distress signal that reached the {{UNSCShip|Pillar of Autumn}} alerting them that the prowler had failed to delete its NAV database as per the [[United Nations Space Command Emergency Priority Order 098831A-1|Cole Protocol]].<ref>'''Halo: The Fall of Reach''', ''page 302''</ref> When the [[SPARTAN-II Program|SPARTAN-II]] team led by [[John-117]] arrived at Reach Station Gamma, they tried to contact Doppler but were unsuccessful, indicating that he had self-destructed in accordance with the Cole Protocol.
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| ==Avatar==
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| Doppler took the appearance of an English scholar, dressed in a red jacket, a bowtie, and spectacles. He may have been named after the Austrian physicist [[Wikipedia:Christian Doppler|Christian Doppler]], who discovered the wave behavior known as the [[Wikipedia:Doppler effect|Doppler effect]].
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| ==Gallery==
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| <gallery>
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| File:Invasion; Doppler.jpg|Doppler's avatar.
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| </gallery>
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| ==List of appearances==
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| *''[[Halo: The Fall of Reach]]'' {{1st}}
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| *''[[Halo: Fall of Reach]]''
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| **''[[Halo: Fall of Reach - Invasion|Invasion]]''
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| ==Sources== | | ==Sources== |
| {{Ref/Sources}}
| | <references/> |
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| {{UNSC AI}}
| | [[Category:A.I.]] |
| [[Category:AI characters]] | |
