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  2. Envelope (radar) - Wikipedia

    en.wikipedia.org/wiki/Envelope_(radar)

    Pulse-Doppler radar and Continuous-wave radar are required for high performance in this area because these exclude low-velocity reflections. This is a critical measure of performance for the Littoral zone and land-based radar. Prevailing winds of about 15 mile/hour cover most of the surface of the earth. This constantly stirs up debris into the ...

  3. Activate package tracking in the AOL app

    help.aol.com/articles/activate-package-tracking...

    Activate package tracking in the AOL app Package updates are displayed at the top of the inbox in the AOL app, or in the Receipts view tab under the Packages filter. These updates include more information and quick links to assist you with tracking your deliveries and in-store pickup orders.

  4. Registered mail - Wikipedia

    en.wikipedia.org/wiki/Registered_mail

    While not a form of registered mail, certified mail allows the sender proof of mailing via a mailing receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. [17] Some in-transit tracking and delivery confirmation information may be provided, but there is no formal chain of custody.

  5. Tracking number - Wikipedia

    en.wikipedia.org/wiki/Tracking_number

    Tracking numbers are useful for knowing the location of time sensitive deliveries. It is a unique ID number or code assigned to a package or parcel. The tracking number is typically printed on the shipping label as a bar code that can be scanned by anyone with a bar code reader or smartphone.

  6. Radar - Wikipedia

    en.wikipedia.org/wiki/Radar

    Radar is a system that uses radio waves to determine the distance (), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.

  7. Package redirection scam - Wikipedia

    en.wikipedia.org/wiki/Package_redirection_scam

    This makes it very hard to perform a chargeback, as the tracking shows the item has been delivered. [2] This is also known as an FTID scam , standing for Fake Tracking ID . [ 3 ] [ 4 ] When this scam is successful, the tracking number will show that the package has been delivered to the correct address, when the package was instead delivered to ...

  8. AN/FPS-16 Instrumentation Radar - Wikipedia

    en.wikipedia.org/wiki/AN/FPS-16_Instrumentation...

    The radar provides data and range safety for missile launches. This radar, along with its data system, is used for tracking the Minuteman III ICBM. The AN/FPS-16 is a highly accurate ground-based monopulse single object tracking radar (SOTR), used extensively by the NASA crewed space program

  9. Real-time kinematic positioning - Wikipedia

    en.wikipedia.org/wiki/Real-time_kinematic...

    A surveyor uses a GNSS receiver with an RTK solution to accurately locate a parking stripe for a topographic survey. Real-time kinematic positioning (RTK) is the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. [1]