Satellite Communications Headings (PDF)

Purpose of Satellite Communications -- **ROWINGS RC** Principles of Satellite Communications -- **PTS RL** Demands for Satellite Communications -- **HMM SL** Satellite Comms can we divided into three segments -- **GCS** Space Segment consists of what sub-systems -- **STATE C** The Ground/Earth...

Purpose of Satellite Communications -- **ROWINGS RC** Principles of Satellite Communications -- **PTS RL** Demands for Satellite Communications -- **HMM SL** Satellite Comms can we divided into three segments -- **GCS** Space Segment consists of what sub-systems -- **STATE C** The Ground/Earth segment consists of what sub-systems? -- **CRAFT BP** The three main hazards of Sat Comms -- **RED** The advantages of Sat Comms are -- **WVRQ** Disadvantages of Sat Comm- **CLNP** The three types of orbit -- **PSS** The Four Steps of Monitoring & Control -- **BLT M** The 4 transmit coverage beams -- **GRRT** A transponder is composed of -- **FLIPO** The types of Antennas are -- **COGA** Normally Earth Segment stations are -- **MIFF A** [EMR Travels in straight lines which means we need?] Line of Sight [Satellite Communications utilized what frequency band on the Electro-Magnetic Spectrum?] Microwaves [What are the two types of Satellite network?] Complex Simple [Give an example of a Complex Network?] Global Positioning System (GPS) [What are the Up-Link and Down-Link Frequency Ranges?] Up-Link = 7.9Ghz to 8.4Ghz Down-Link = 7.25Ghz to 7.75Ghz [How long does it take a synchronous orbit to complete a full cycle of the earth?] 23 Hours, 56 minutes and 4 seconds [A satellite must maintain what approx. distance from earth to remain in Orbit?] 22,366 Miles [Is tracking need for a synchronous orbit?] No [Geostationary Orbit coincides with what?] The equatorial plane, so it remains in a constant position in relation to the Eart[h] [Geosynchronous tracks what patter in the sky?] A figure of 8 pattern [What is the purpose of a multiplexer?] A multiplexer recognizes multiple signals and converts them into one signal [What is the purpose of an Up-Converter?] To convert L band frequency to X band for satellite communications. [Why do we use a WaveGuide?] To transport high-powered signals, as coaxial cables would be prone to overheating when making satellite transmissions. [The larger the antenna, the larger the what?] Gain [What company designs the batteries for the BGAN?] Thrane & Thrane (now COBHAM ltd) [What frequency bands does Satellite Communications work in?] UHF -- 300Mhz to 3Ghz SHF -- 3Ghz to 30Ghz [Where are the two UK Main satellite stations?] Oakhanger Colerne [A satellite is defined as what?] A satellite is a body that orbits around another body in space [What are the two types of Satellites?] Natural Man-Made [Who laid out the blueprint for the new ages in Radio, Tv and Comms?] Arthur C Clarke [What was Arthur C Clarkes hypothesis? ] 3 satellites at 120 degrees apart + travelling west to east = worldwide coverage for radio/comms [Sub-Synchronous is split it two orbits what are they?] LEO -- Low Earth Orbit MEO -- Medium Earth Orbit [Synchronous is broken down into two orbits, what are they?] Geo-Stationary Geo-Synchronous