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2. Telecommunications link - Wikipedia

   en.wikipedia.org/wiki/Telecommunications_link

   Pertaining to radiocommunication service, a downlink (DL or D/L) is the portion of a feeder link used for the transmission of signals from a space radio station, space radio system or high altitude platform station to an earth station. In the context of satellite communications, a downlink (DL) is the link from a satellite to a ground station.

3. DVB-RCS - Wikipedia

   en.wikipedia.org/wiki/DVB-RCS

   In contrast to other satellite communications systems, DVB-RCS was created in an open environment where any DVB member can participate. DVB membership is open to all companies willing to subscribe. The work group called "DVB TM-RCS" is currently pursuing other technical solutions for the approved commercial system.

4. Feeder link - Wikipedia

   en.wikipedia.org/wiki/Feeder_link

   Uplink / downlink feeder links Aerial (earth station) for uplink radiocommunication. A feeder link is – according to Article 1.115 of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR) [1] – defined as:

5. Argos (satellite system) - Wikipedia

   en.wikipedia.org/wiki/Argos_(satellite_system)

   However, due to ground-based alarm system interference issues in the United States, [8] the downlink was disabled on the NOAA-19 satellite. [9] Other newer satellites still transmit on this frequency. The downlink contains date and time, Argos System satellite ephemeris data, and the downlink portion of the two-way communication link.

6. High Speed Packet Access - Wikipedia

   en.wikipedia.org/wiki/High_Speed_Packet_Access

   High Speed Downlink Packet Access (HSDPA) is an enhanced 3G (third-generation) mobile communications protocol in the High-Speed Packet Access (HSPA) family. HSDPA is also known as 3.5G and 3G+ . It allows networks based on the Universal Mobile Telecommunications System (UMTS) to have higher data speeds and capacity.

7. Tracking and Data Relay Satellite System - Wikipedia

   en.wikipedia.org/wiki/Tracking_and_Data_Relay...

   TDRS Program Logo Location of TDRS as of March 2019 An unflown TDRS on display at the Steven F. Udvar-Hazy Center in Chantilly, Virginia.. The U.S. Tracking and Data Relay Satellite System (TDRSS, pronounced "T-driss") is a network of American communications satellites (each called a tracking and data relay satellite, TDRS) and ground stations used by NASA for space communications.

8. Space segment - Wikipedia

   en.wikipedia.org/wiki/Space_segment

   A telecommunications satellite. The space segment comprises the uplink, the satellite itself, and the downlink A large parabolic antenna in a satellite Earth station. The space segment of an artificial satellite system is one of its three operational components (the others being the user and ground segments).

9. Automatic Dependent Surveillance–Broadcast - Wikipedia

   en.wikipedia.org/wiki/Automatic_Dependent...

   Conceptual of the ADS-B system, illustrating radio links between aircraft, ground station and satellite. Automatic Dependent Surveillance–Broadcast (ADS-B) is an aviation surveillance technology and form of electronic conspicuity in which an aircraft determines its position via satellite navigation or other sensors and periodically broadcasts its position and other related data, enabling it ...