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  2. List of satellite pass predictors - Wikipedia

    en.wikipedia.org/wiki/List_of_satellite_pass...

    Ground track example from Heavens-Above.An observer in Sicily can see the International Space Station when it enters the circle at 9:26 p.m. The observer would see a bright object appear in the northwest, which would move across the sky to a point almost overhead, where it disappears from view, in the space of three minutes.

  3. Double Asteroid Redirection Test - Wikipedia

    en.wikipedia.org/wiki/Double_Asteroid...

    The DART spacecraft was the first spacecraft to use a new type of high-gain communication antenna, a Spiral Radial Line Slot Array (RLSA). The circularly-polarized antenna operated at the ( microwave ) X-band NASA Deep Space Network (NASA DSN) frequencies of 7.2 and 8.4 GHz , and had a gain of 29.8 dBi on downlink and 23.6 dBi on uplink.

  4. Comparison of free off-line satellite navigation software

    en.wikipedia.org/wiki/Comparison_of_free_off...

    Some of the free software mentioned here does not have detailed maps (or maps at all) or the ability to follow streets or type in street names (no geocoding). However, in many cases, it is also that which makes the program free (and sometimes open source [ 1 ] ), avoid the need of an Internet connection, [ 2 ] [ 3 ] [ 4 ] and make it very ...

  5. Satellite navigation software - Wikipedia

    en.wikipedia.org/wiki/Satellite_navigation_software

    Positioning: determines the device's precise location using signals from multiple satellites; Route planning: calculates optimized route based on user needs, such as starting point, destination, and travelling mean, et cetera. This functionality could be extended to driving assistant. Tracking: shows where the tracked object have been. (This ...

  6. Comparison of satellite navigation software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_satellite...

    Maps source Operating platform Software license Cost Maps can be preloaded (and stored) 3D navigation mode Voice-guidance Live traffic Speed traps Other feature (remarks) Apple Maps: TomTom, Automotive Navigation Data, Getchee, Hexagon AB, IGN, Increment P, Intermap Technologies, LeadDog, MDA Information Systems, OpenStreetMap, Waze [1] iOS ...

  7. Tracking and data relay satellite - Wikipedia

    en.wikipedia.org/wiki/Tracking_and_data_relay...

    TDRS-A was the first of TDRSS multiple satellite tracking system. The system is a concept utilizing communication satellite technology that improves and economizes the satellite tracking and telemetry operations. The base three geosynchronous satellites (one a standby) track and receive data from satellites for relay to a ground station. The ...

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