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. ...

Uplink

May 19, 2015

To transmit to a satellite for relay; also, the dish used to transmit. ...

Simplex operation

May 19, 2015

That mode of operation in which communication between two points occurs in only one direction at a time. Contrast with half duplex or duplex operation. ...

Shared hub

May 19, 2015

A satellite communications operations center which is shared among a number of separate network users; often used for VSAT operations. ...

Outage

May 19, 2015

A telecommunication service condition wherein a user is deprived of service due to a malfunction of the communication system. ...

On-line

May 19, 2015

Electronic availability on demand from a computer-based system without mounting removable media such as magnetic tape or disks. ...

MSS

May 19, 2015

Mobile Satellite Service ...

ISDN

May 19, 2015

Integrated Services Digital Network ...