Showing 21 - 40 of 81 results

Telemetry, Tracking and Control (TT&C)

May 19, 2015

Means of accessing the control systems in a spacecraft in order to position and configure the spacecraft; or the facility which monitors and controls the health of a satellite. ...

Solid State Power Amplifier (SSPA)

May 19, 2015

A high power amplifier using semiconductors to amplify the signal. ...

Radio Frequency Interference (RFI)

May 19, 2015

A term used to denote apparent disturbance or distortion to satellite signals. ...

Quadrature Phase Shift Keying (QPSK)

May 19, 2015

Digital modulation scheme used in transmission communications that allows increased sending capacity. ...

Public Switched Telephone Network (PSTN)

May 19, 2015

Any common carrier network that provides circuit switching among public users. Note: The term is usually applied to the public switched telephone network, but it could be applied more generally to other switched networks, e.g., packet switched public ...

LNA

May 19, 2015

Low Noise Amplifier ...

k/bs

May 19, 2015

Kilobit per second ...

High Power Amplifier (HPA)

May 19, 2015

Equipment used to amplify signals. ...

Geosynchronous Orbit (GSO)

May 19, 2015

Satellite in geosynchronous orbit travel around the Earth in an area approximately 22,300 miles from the surface at the same rate that the Earth turns, therefore completing one revolution every 24 hours. ...

Demand Assigned Multiple Access (DAMA)

May 19, 2015

Refers to contention access schemes that allow multiple communications users to share a discrete portion of the bandwidth. ...

Carrier

May 19, 2015

The basic radio signal that transfers the information signal. It occupies a single radio frequency (see also Common Carrier). ...

Broadcasting

May 19, 2015

Using the electronic media to reach a wide-area audience. ...

Bandwidth

May 19, 2015

The bandwidth of a device is the difference between the limiting frequencies within which performance with respect to some characteristic falls within specified limits. ...

Time Division Multiple Access (TDMA)

May 19, 2015

A method of accessing a satellite using time separation; sending simultaneous data streams interleaved using a clock to separate the various data packets. ...

Television Receive Only (TVRO)

May 19, 2015

A satellite receiving antenna, also known as a downlink or a backyard dish ...

Synchronous transmission

May 19, 2015

Digital transmission in which the time interval between any two similar significant instants in the overall bit stream is always an integral number of unit intervals. Note: Isochronous and anisochronous are characteristics, while synchronous and asyn ...

Spot beams

May 19, 2015

The focusing of energy from a satellite to the ground to concentrate the limited available effective radiated power (EIRP). ...

Internetworking

May 19, 2015

The process of interconnecting a number of individual networks to provide a path from a terminal or a host on one network to a terminal or a host on another network. The networks involved may be of the same type, or they may be of different types. Ho ...

Echo suppression

May 19, 2015

Refers to the cancellation of any reflected signal in a communications channel. ...

Downlink

May 19, 2015

Transmissions from a satellite to a ground station; also, the dish used for reception. ...