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Russian to English translations [PRO]
Tech/Engineering - Aerospace / Aviation / Space | | Russian term or phrase: уводящий сигнал | context:
Известно, что в американской системе GPS, для гражданского канала, ранее вводился обязательный “уводящий сигнал”, сильно затруднявший точное и быстрое определение координат.
source:
http://warinform.ru/forum/viewtopic.php?f=31&t=69&p=1447 |
| | | false signal | Explanation:
Hijacking Satellite Navigation Sending false signals to GPS receivers could disrupt critical infrastructure.
--------------------------------------------------------------------------------
•From: Jack Linthicum <jacklinthicum@xxxxxxxxxxxxx>
•Date: Thu, 2 Oct 2008 03:23:10 -0700 (PDT)
--------------------------------------------------------------------------------
Thursday, October 02, 2008
Hijacking Satellite Navigation
Sending false signals to GPS receivers could disrupt critical
infrastructure.
By Erica Naone
The Global Positioning System (GPS) lies at the heart of an increasing
number of technologies, from vehicle navigation systems to the power
grid. And yet, although the military version of GPS includes security
features such as encryption, civilian signals are transmitted in the
clear. Now, researchers at Cornell University and Virginia Tech have
demonstrated a relatively simple way to fool ordinary GPS receivers
into accepting bogus signals using a briefcase-size transmitter.
Paul Kintner, a professor of electrical and computer engineering at
Cornell, who worked on the project, warns that society is becoming
dependent on GPS for an ever-broadening list of applications,
including management of the power grid and tracking criminals under
house arrest. "I'm just amazed at the way people are using these GPS
systems," Kintner says. "Ten years from now, there will be more ways
that we just don't know about--it migrates into our technological
fabric, and we become dependent on it."
http://newsgroups.derkeiler.com/Archive/Sci/sci.military.nav...
--------------------------------------------------
Note added at 2 hrs (2011-03-10 14:52:45 GMT)
--------------------------------------------------
Исходный текст:
GPS, ГЛОНАСС и помехи в навигации
Известно, что в американской системе GPS, для гражданского канала, ранее вводился обязательный “уводящий сигнал”, сильно затруднявший точное и быстрое определение координат. Делалось это для того, чтобы, например, враги США не могли использовать GPS для наведения высокоточного оружия или для точной глобальной синхронизации действий. Позже помеху убрали, но, понятно, при необходимости могут вернуть её обратно без предупреждения.(Военные приёмники GPS, используя дополнительную информацию, могут корректировать координаты и работать точно, даже при наличии помехи для других.) То есть, действительно, лучше использовать ГЛОНАСС, когда его развернут.
System and method for detecting false navigation signals United States Patent 7724184 Ads by Google
GPS Fleet Tracking
Increase Employee Productivity & Save On Fuel Cost. Free Live Demo!
www.FleetMatics.co.uk/FleetTrackingA system and method for detecting and excluding false GPS signals are disclosed, which predict a GPS measurement value with a high degree of confidence, compare the predicted value with measured values, and reject a false measurement based on the comparison results. As one example, a tightly coupled GPS/Inertial Navigation System (GPS/INS) is disclosed, which uses a Kalman filter for comparison of a predicted GPS measurement value with measured values (e.g., the residuals) to form the basis for the rejection of false measurements. This rejection is referred to as a chi-squared reject, and can be extended in time in order to apply the same test to a reacquired signal following the loss of an original validated GPS signal. The Kalman filter propagates the receiver's clock bias rate, and enables the system to predict the GPS measurements at the time of reacquisition. The residuals are compared to a limit defined by the uncertainties of the prediction and the measurement errors expected to be involved.
http://www.freepatentsonline.com/7724184.html
FALSE NAVIGATION SIGNAL
|
| Selected response from:
LanaUK
United Kingdom
Local time: 12:51
| Grading comment Thanks, Lana.
4 KudoZ points were awarded for this answer |
| |
| Discussion entries: 0 |
|---|
Automatic update in 00:
|
1 hr confidence:   peer agreement (net): +2 false signal
Explanation:
Hijacking Satellite Navigation Sending false signals to GPS receivers could disrupt critical infrastructure.
--------------------------------------------------------------------------------
•From: Jack Linthicum <jacklinthicum@xxxxxxxxxxxxx>
•Date: Thu, 2 Oct 2008 03:23:10 -0700 (PDT)
--------------------------------------------------------------------------------
Thursday, October 02, 2008
Hijacking Satellite Navigation
Sending false signals to GPS receivers could disrupt critical
infrastructure.
By Erica Naone
The Global Positioning System (GPS) lies at the heart of an increasing
number of technologies, from vehicle navigation systems to the power
grid. And yet, although the military version of GPS includes security
features such as encryption, civilian signals are transmitted in the
clear. Now, researchers at Cornell University and Virginia Tech have
demonstrated a relatively simple way to fool ordinary GPS receivers
into accepting bogus signals using a briefcase-size transmitter.
Paul Kintner, a professor of electrical and computer engineering at
Cornell, who worked on the project, warns that society is becoming
dependent on GPS for an ever-broadening list of applications,
including management of the power grid and tracking criminals under
house arrest. "I'm just amazed at the way people are using these GPS
systems," Kintner says. "Ten years from now, there will be more ways
that we just don't know about--it migrates into our technological
fabric, and we become dependent on it."
http://newsgroups.derkeiler.com/Archive/Sci/sci.military.nav...
--------------------------------------------------
Note added at 2 hrs (2011-03-10 14:52:45 GMT)
--------------------------------------------------
Исходный текст:
GPS, ГЛОНАСС и помехи в навигации
Известно, что в американской системе GPS, для гражданского канала, ранее вводился обязательный “уводящий сигнал”, сильно затруднявший точное и быстрое определение координат. Делалось это для того, чтобы, например, враги США не могли использовать GPS для наведения высокоточного оружия или для точной глобальной синхронизации действий. Позже помеху убрали, но, понятно, при необходимости могут вернуть её обратно без предупреждения.(Военные приёмники GPS, используя дополнительную информацию, могут корректировать координаты и работать точно, даже при наличии помехи для других.) То есть, действительно, лучше использовать ГЛОНАСС, когда его развернут.
System and method for detecting false navigation signals United States Patent 7724184 Ads by Google
GPS Fleet Tracking
Increase Employee Productivity & Save On Fuel Cost. Free Live Demo!
www.FleetMatics.co.uk/FleetTrackingA system and method for detecting and excluding false GPS signals are disclosed, which predict a GPS measurement value with a high degree of confidence, compare the predicted value with measured values, and reject a false measurement based on the comparison results. As one example, a tightly coupled GPS/Inertial Navigation System (GPS/INS) is disclosed, which uses a Kalman filter for comparison of a predicted GPS measurement value with measured values (e.g., the residuals) to form the basis for the rejection of false measurements. This rejection is referred to as a chi-squared reject, and can be extended in time in order to apply the same test to a reacquired signal following the loss of an original validated GPS signal. The Kalman filter propagates the receiver's clock bias rate, and enables the system to predict the GPS measurements at the time of reacquisition. The residuals are compared to a limit defined by the uncertainties of the prediction and the measurement errors expected to be involved.
http://www.freepatentsonline.com/7724184.html
FALSE NAVIGATION SIGNAL
| LanaUK
United Kingdom
Local time: 12:51
Native speaker of:  English, Russian
PRO pts in category: 4
|
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