Ads
related to: ultra high frequency downlinks
Search results
Results From The WOW.Com Content Network
Ultra high frequency (UHF) is the ITU designation [1] [2] for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).
Ultra High Frequency Follow-On (UFO) satellite system is a United States Department of Defense (DoD) program sponsored and operated by the United States Space Force to provide communications for airborne, ship, submarine and ground forces.
Deep Space Optical Communications (DSOC) is a laser space communication system in operation that improved communications performance 10 to 100 times over radio frequency technology without incurring increases in mass, volume or power. [1] DSOC is capable of providing high bandwidth downlinks from beyond cislunar space.
Advanced Extremely High Frequency (AEHF) is a constellation of communications satellites operated by the United States Space Force. They are used to relay secure communications for the United States Armed Forces , the British Armed Forces , the Canadian Armed Forces , the Netherlands Armed Forces and the Australian Defence Force . [ 3 ]
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.
Uplink voice and command, and downlink voice and telemetry data were sent via ultra high frequency (UHF) and very high frequency (VHF) systems. [1] The tracking capability was a C band beacon interrogated by a ground-based radar. With the much greater distance of Apollo, passive ranging was not feasible, so a new active ranging system was ...
The Kepler Mission used this frequency range to downlink the scientific data collected by the space telescope. [7] This frequency is also used for remote sensing of clouds by radar, by both ground-based [8] or satellite [9] systems such as INCUS. In satellite communications, the K a band allows higher bandwidth communication. [10]
241 - RF Interface Requirements for VHF Frequency Hopping Tactical Radio Systems; 242 - Interoperability & Performance Standards For Tactical Single Channel Very High Frequency (VHF) Radio Equipment; 243 - Interoperability And Performance Standards For Tactical Single Channel Ultra High Frequency (UHF) Radio Communications