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| {{Status|Canon}} | | {{Era|HCW}} |
| | {{Ratings}} |
| | {{disambig header|the AI|radar|Doppler Radar}} |
| {{AI infobox | | {{AI infobox |
| |name=Doppler | | |name=Doppler |
| |image=[[File:FoRInvasion - Doppler.png|300px]] | | |image= |
| |number=8575 | | |number=8575 |
| |began=Before [[2552]] | | |began=Before [[2552]] |
| |ended=[[2552]] | | |ended=[[2552]] |
| |gender=Male programming | | |gender=Male Programming |
| |description= | | |description= |
| |color= | | |color= |
| |affiliation=[[United Nations Space Command]] | | |affiliation=[[United Nations Space Command]], |
| |function=Space Dock Quartermaster | | |function=Space Dock Quartermaster |
| |battles=[[Fall of Reach|Battle of Reach]]}} | | |battles=[[Battle of Reach]] |
| '''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==
| | '''Doppler''', serial number 8575, was a [[UNSC]] [[Artificial Intelligence]]. |
| 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.
| | In [[2552]], Doppler was the Space Dock Quartermaster for [[Reach Station Gamma]] in orbit of [[Reach]]. Just prior to the [[Battle of Reach]], Doppler alerted [[FLEETCOM]] that the {{UNSCShip|Circumference}} had failed to delete its NAV database as per the [[Cole Protocol]].<ref>'''[[Halo: The Fall of Reach]]''', ''page 302''</ref> When the [[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== | | ==List of appearances== |
| *''[[Halo: The Fall of Reach]]'' {{1st}} | | *[[Halo: The Fall of Reach]] |
| *''[[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}} | | {{UNSC AI}} |
| [[Category:AI characters]]
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