Difference between revisions of "DRADIS"

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{{disline|For the [[Original Series]] counterpart, see [[scanner|Scanner]].}}
  
[[Image:Dradisscreen.jpg|thumb|A typical DRADIS read-out]]
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'''DRADIS''' ('''''D'''irection, '''RA'''nge, and '''DIS'''tance'')<ref>Breakdown of the term is taken from an early manuscript of the first half of the Miniseries. For more information, please see "Notes".</ref> is a series of highly sensitive detection, identification, navigation and tracking systems used to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, spacecraft, weapons ordnance, celestial bodies, and terrain. <ref>It appears that DRADIS is the Colonial equivalent of RADAR ('''''RA'''dio '''D'''etection '''A'''nd '''R'''anging'') here on Earth, but does not use that term. However, in "[[The Hand of God (RDM)|The Hand of God]]", some viewers believed that Lt. [[Kara Thrace]] said, "The decoy ships will jump into the enemy star system at extreme ''radar'' range from the Cylon asteroid." The use of "radar" would be a [[Continuity errors (RDM)|continuity error]] as official sources confirmed that "radar" does not exist in the Re-imagined Series.  Others believed that actress [[Katee Sackhoff]] said "extreme ''Raider'' range", the range of the Raiders from the Cylon base, and the word was slurred so that it sounded vaguely like "radar".  The matter was put to rest when Battlestar Wiki [[Battlestar Wiki:Official Communiques/Archive1#.22Radar.22_gaffe_in_.22The_Hand_of_God.22.3F|asked]] the writer of this episode, [[Bradley Thompson]], who confirmed that the line in the script was "...extreme ''Viper''  range...". The final line must have been looped in during post-production without his input (probably to keep from spoiling the plot). Thompson confirmed that the final line sounded like "Raider".</ref>  
'''DRADIS''' ('''D'''irection, '''RA'''nge, and '''DIS'''tance)<ref>Though range and distance seem redundant, their use together works given the x, y, and z axes of three dimensional space.  Range most likely refers to how far the object is relative to the x and y planes, as displayed visually on a typical radar screen.  Distance would then incorporate the z plane as well to refer to the actual physical distance of an object. For example, if one ship was directly above another, the range between the two would be 0, but the distance would be how far above it is from the other ship.</ref> is a highly sensitive detection, identification, navigation and tracking system, somewhat similar to [[Wikipedia:Radar|radar]]<ref>In "[[The Hand of God (RDM)|The Hand of God]]", some viewers believed that [[Kara Thrace|Starbuck]] said, "The decoy ships will jump into the enemy star system at extreme ''radar'' range from the Cylon asteroid." The use of "radar" would be a [[Continuity errors (RDM)|continuity error]] as official sources confirmed that "radar" does not exist in the Re-imagined Series.  Others believed that actress [[Katee Sackhoff]] said "extreme ''Raider'' range", the range of the Raiders from the Cylon base, and the word was slurred so that it sounded vaguely like "radar".  The matter was put to rest when Battlestar Wiki [[Battlestar Wiki:Official Communiques#"Radar" gaffe in "The Hand of God"|asked]] the writer of this episode, [[Bradley Thompson]], who confirmed that the line in the script was "...extreme ''Viper''  range...". The final line must have been looped in during post-production without his input (probably to keep from spoiling the plot). Thompson confirmed that the final line sounded like "Raider".</ref>, used aboard Colonial spacecraft. 
 
  
DRADIS can be used in stationary configurations as well on ships. A group of [[Cylon Centurion]]s are able to jury-rig a DRADIS assembly from their [[Heavy Raider]] into a stationary DRADIS tracking array in an attempt to eliminate any [[SAR]] missions from ''[[Galactica]]'' ([[Fragged]]).
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[[Image:DRADIS Closeup.jpg|thumb|A DRADIS screen displays numerous friendly (green) and hostile (red) contacts.]]
  
Carbon composites are largely invisible to DRADIS scans ([[Flight of the Phoenix]]).
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=== Operations ===
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DRADIS is a central component of the navigation computer, and defensive and offensive weapons systems, especially on Colonial warships that do not have windows or portholes of any kind that would allow an outside view of the vessel. Without it, the warship is blind. It is the first line of defense after enemy contact is made, alerting warship crews to any incoming danger, such as nuclear (which triggers the ship's [[radiological alarm|Radiological Alarm]]) ([[TRS]]: "[[33]]", "[[The Captain's Hand]]") or conventional ordnance {{TRS|He That Believeth In Me}}, and any objects that might pose a collision risk ("[[CBDR]]" - '''''C'''onstant '''B'''earing, '''D'''ecreasing '''R'''ange'') {{TRS|Pegasus (episode)|}}. Tactical and navigation data acquired from DRADIS scans are displayed on a series of screens that form the [[DRADIS console]], suspended above the [[CIC]]'s Command and Control console ([[TRS]]: "[[Miniseries]]", ''et al'').
  
A ''DRADIS contact'' is an object or objects detected by DRADIS. Contacts are typically identified by cross-referencing with an [[IFF]] system (in the case of ships) or an astronomical database (in the instance of planets or other celestial bodies).  
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=== Limitations and Interference ===
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[[Image:DRADIS Interference.jpg|thumb|A DRADIS readout is hindered by large amounts of external interference.]]
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DRADIS systems are often subject to various sources of interference, and clutter. These can come from excessive contacts or naturally occurring objects such as nebulas, EM interference, star clusters, pulsars, and binary stars. There isn't much an operator can do to eliminate these sources, and must do the best they can given the circumstances. However, DRADIS systems can still eliminate these sources enough to detect objects at closer ranges {{TRS|Lay Down Your Burdens, Part II}}. DRADIS operators can also "turn off" various sources of clutter, for example, excessive or uninteresting contacts can be toned down to simply an icon on the screen, allowing more important contacts, such as a ship's [[CAP|Combat Air Patrol]], or enemy contact, to be highlighted with its speed, direction, and [[IFF|transponder ID]].
  
The symbols used on Colonial DRADIS displays for the representation of [[battlestar (RDM)|battlestars]], [[Raptor|Raptors]], and [[Viper (RDM)|Vipers]] are visible in the picture to the right.
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Carbon composites can also absorb and diffuse DRADIS scans, rending any vehicle comprised of such material largely invisible. One such vehicle, the ''[[Blackbird]]'', was able to fly through and photograph a Cylon fleet tracking the battlestar ''{{RDM|Galactica}}'' without being noticed {{TRS|Flight of the Phoenix}}. Conversely, false positive contacts can be induced through electronic interference or malfunction, producing contacts that either misrepresent their actual configuration or do not actually exist. In the case of the latter, such false positives are referred to as "ghosts" {{TRS|Exodus, Part II|The Oath|}}.
[[Image:Dradissymbol pegasus.JPG|thumb|DRADIS symbology for various Colonial Fleet units ([[Pegasus (episode)|Pegasus]])]]
 
  
[[Image:radalm_217_1080i.jpg|thumb|DRADIS warning of radiological materials ([[The Captain's Hand]])]] DRADIS is also used to report [[radiological alarm]]s. [[Image:Dradiscountdown_101_1080i.jpg|thumb|DRADIS countdown ([[33]])]]
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=== Cylon DRADIS ===
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The [[Cylons (RDM)|Cylons]] also employ DRADIS on their spacecraft, however, in what capacity is not known. No visual representation of the Cylon DRADIS exists, as the corresponding tracking data appears to be uploaded directly into the consciousnesses of the Cylons in charge of command and control via the Baseship [[datastream]] {{TRS|The Ties That Bind}}.
  
DRADIS is likely a central component of the [[Computers|navigation computer]] on Colonial ships such as battlestars, as they do not navigate in [[sublight]] mode by visual means. ''Galactica's'' DRADIS, tactical and navigation data are displayed on a series of screens that form the [[Dradis console|DRADIS console]], suspended above the [[CIC]]'s Command and Control console.
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{{clear}}
  
== Sourcing of the term ==
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== Notes ==
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The "'''D'''irection, '''RA'''nge, and '''DIS'''tance" breakdown of the acronym "DRADIS" was listed in an early manuscript of the first half of the [[Miniseries]]. Since some major elements of this script were changed (such as Kobol being the sole home of the Colonies, and not separate worlds) in comparison to the completed teleplay, canonical use of this breakdown should be taken with some skepticism.
  
The "'''D'''irection, '''RA'''nge, and '''DIS'''tance" breakdown of the acronym "DRADIS" was listed in an [http://www.twiztv.com/scripts/battlestar/season1/galactica-ms1.pdf early manuscript] (PDF) of the first half of the [[Miniseries]]. Since some major elements of this script were changed (such as Kobol being the sole home of the Colonies, and not separate worlds) in comparison to the completed teleplay, canonical use of this breakdown should be taken with some skepticism.
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There is some evidence to suggest that the original breakdown is the canonical version. In "[[Kobol's Last Gleaming, Part I]]", Lt. [[Alex Quartararo|Alex "Crashdown" Quartararo]] performs a DRADIS sweep of {{RDM|Kobol}}. The aerial survey is later presented to the [[Laura Roslin|President]]. For a brief moment, as Roslin takes the survey image out of [[Billy Keikeya]]'s hand, the DRADIS information printed on the image is [http://www.frak-that.com/112/images/112_cap309.jpg visible] (Bottom right). The letters on the image are clear and are as follows:
 
 
There is some evidence to suggest that the original breakdown is the canonical version. In "[[Kobol's Last Gleaming, Part I]]," [[Crashdown]] performs a DRADIS sweep of [[Kobol (RDM)|Kobol]]. The aerial survey is later presented to the [[Laura Roslin|President]]. For a brief moment, as Roslin takes the survey image out of [[Billy Keikeya]]'s hand, you can see the DRADIS information printed on the image. The letters on the image are clear and are as follows:
 
  
 
:Aerial Survey
 
:Aerial Survey
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:'''Dis.''' 43.5
 
:'''Dis.''' 43.5
  
The letters represent numerical values. While this is not conclusive evidence, it is consistent with the orignal manuscript definition.
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The letters represent numerical values. While this is not conclusive evidence, it is consistent with the original manuscript definition.
  
 
==See Also==
 
==See Also==
 
*[[List of terms (RDM)|List of terms in the Re-imagined Series]]
 
*[[List of terms (RDM)|List of terms in the Re-imagined Series]]
 
==Notes==
 
 
*The [[Battlestar Galactica (TOS)|Original Series]] counterpart to DRADIS was simply referred to as the [[scanner]].
 
  
 
==References==
 
==References==
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Latest revision as of 23:28, 9 January 2021

For the Original Series counterpart, see Scanner.

DRADIS (Direction, RAnge, and DIStance)[1] is a series of highly sensitive detection, identification, navigation and tracking systems used to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, spacecraft, weapons ordnance, celestial bodies, and terrain. [2]

A DRADIS screen displays numerous friendly (green) and hostile (red) contacts.

Operations

DRADIS is a central component of the navigation computer, and defensive and offensive weapons systems, especially on Colonial warships that do not have windows or portholes of any kind that would allow an outside view of the vessel. Without it, the warship is blind. It is the first line of defense after enemy contact is made, alerting warship crews to any incoming danger, such as nuclear (which triggers the ship's Radiological Alarm) (TRS: "33", "The Captain's Hand") or conventional ordnance (TRS: "He That Believeth In Me"), and any objects that might pose a collision risk ("CBDR" - Constant Bearing, Decreasing Range) (TRS: "Pegasus"). Tactical and navigation data acquired from DRADIS scans are displayed on a series of screens that form the DRADIS console, suspended above the CIC's Command and Control console (TRS: "Miniseries", et al).

Limitations and Interference

A DRADIS readout is hindered by large amounts of external interference.

DRADIS systems are often subject to various sources of interference, and clutter. These can come from excessive contacts or naturally occurring objects such as nebulas, EM interference, star clusters, pulsars, and binary stars. There isn't much an operator can do to eliminate these sources, and must do the best they can given the circumstances. However, DRADIS systems can still eliminate these sources enough to detect objects at closer ranges (TRS: "Lay Down Your Burdens, Part II"). DRADIS operators can also "turn off" various sources of clutter, for example, excessive or uninteresting contacts can be toned down to simply an icon on the screen, allowing more important contacts, such as a ship's Combat Air Patrol, or enemy contact, to be highlighted with its speed, direction, and transponder ID.

Carbon composites can also absorb and diffuse DRADIS scans, rending any vehicle comprised of such material largely invisible. One such vehicle, the Blackbird, was able to fly through and photograph a Cylon fleet tracking the battlestar Galactica without being noticed (TRS: "Flight of the Phoenix"). Conversely, false positive contacts can be induced through electronic interference or malfunction, producing contacts that either misrepresent their actual configuration or do not actually exist. In the case of the latter, such false positives are referred to as "ghosts" (TRS: "Exodus, Part II", "The Oath").

Cylon DRADIS

The Cylons also employ DRADIS on their spacecraft, however, in what capacity is not known. No visual representation of the Cylon DRADIS exists, as the corresponding tracking data appears to be uploaded directly into the consciousnesses of the Cylons in charge of command and control via the Baseship datastream (TRS: "The Ties That Bind").


Notes

The "Direction, RAnge, and DIStance" breakdown of the acronym "DRADIS" was listed in an early manuscript of the first half of the Miniseries. Since some major elements of this script were changed (such as Kobol being the sole home of the Colonies, and not separate worlds) in comparison to the completed teleplay, canonical use of this breakdown should be taken with some skepticism.

There is some evidence to suggest that the original breakdown is the canonical version. In "Kobol's Last Gleaming, Part I", Lt. Alex "Crashdown" Quartararo performs a DRADIS sweep of Kobol. The aerial survey is later presented to the President. For a brief moment, as Roslin takes the survey image out of Billy Keikeya's hand, the DRADIS information printed on the image is visible (Bottom right). The letters on the image are clear and are as follows:

Aerial Survey
D. 41376
Ra. 145.8
Dis. 43.5

The letters represent numerical values. While this is not conclusive evidence, it is consistent with the original manuscript definition.

See Also

References

  1. Breakdown of the term is taken from an early manuscript of the first half of the Miniseries. For more information, please see "Notes".
  2. It appears that DRADIS is the Colonial equivalent of RADAR (RAdio Detection And Ranging) here on Earth, but does not use that term. However, in "The Hand of God", some viewers believed that Lt. Kara Thrace said, "The decoy ships will jump into the enemy star system at extreme radar range from the Cylon asteroid." The use of "radar" would be a continuity error as official sources confirmed that "radar" does not exist in the Re-imagined Series. Others believed that actress Katee Sackhoff said "extreme Raider range", the range of the Raiders from the Cylon base, and the word was slurred so that it sounded vaguely like "radar". The matter was put to rest when Battlestar Wiki asked the writer of this episode, Bradley Thompson, who confirmed that the line in the script was "...extreme Viper range...". The final line must have been looped in during post-production without his input (probably to keep from spoiling the plot). Thompson confirmed that the final line sounded like "Raider".