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  2. Ground delay program - Wikipedia

    en.wikipedia.org/wiki/Ground_delay_program

    Ground delay programs (GDP) can affect various sections of the United States' airspace, as well as airports in Canada. That is because Nav Canada inherited the agreement between the FAA and Transport Canada that the Ground Delay Program would be implemented for departures from Canadian airports. GDPs are always assigned a "scope" and to a ...

  3. Synthetic-aperture radar - Wikipedia

    en.wikipedia.org/wiki/Synthetic-aperture_radar

    The high digital computing speed now available allows such processing to be done in near-real time on board a SAR aircraft. (There is necessarily a minimum time delay until all parts of the signal have been received.) The result is a map of radar reflectivity, including both amplitude and phase.

  4. Phased array - Wikipedia

    en.wikipedia.org/wiki/Phased_array

    The most common kind of time domain beam former is serpentine waveguide. Active phased array designs use individual delay lines that are switched on and off. Yttrium iron garnet phase shifters vary the phase delay using the strength of a magnetic field. There are two different types of frequency domain beamformers.

  5. Secondary surveillance radar - Wikipedia

    en.wikipedia.org/wiki/Secondary_surveillance_radar

    Secondary surveillance radar antenna (flat rectangle, top) mounted on an ASR-9 primary airport surveillance radar antenna (curved rectangle, bottom).. The need to be able to identify aircraft more easily and reliably led to another wartime radar development, the Identification Friend or Foe (IFF) system, which had been created as a means of positively identifying friendly aircraft from unknowns.

  6. US proposes delaying full enforcement of stricter ID rules ...

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    The Department of Homeland Security had in December 2022 pushed back the "REAL ID" enforcement deadline until May 7, 2025. Enforcing the requirements immediately could have a significant impact on ...

  7. How to make delicious hot chocolate from scratch

    www.aol.com/delicious-hot-chocolate-scratch...

    Mix until everything is melted together. Now you can serve the hot cocoa with whatever toppings you like, whipped cream marshmallows or even shaved chocolate. ... 2025 NFL mock draft 4.0: Raiders ...

  8. The Dow just did something it hasn’t done since Jimmy ... - AOL

    www.aol.com/dow-danger-doing-something-hasn...

    The world’s most famous market indicator just suffered its longest losing streak since Jimmy Carter was in the White House. The Dow Jones Industrial Average closed lower by 267 points on Tuesday ...

  9. Radar tracker - Wikipedia

    en.wikipedia.org/wiki/Radar_tracker

    Typically a new track is given the status of tentative until plots from subsequent radar updates have been successfully associated with the new track. Tentative tracks are not shown to the operator and so they provide a means of preventing false tracks from appearing on the screen - at the expense of some delay in the first reporting of a track.