Satellite payload
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A small presentation about Satellite Payload to help the viewer get a brief introduction about payload on satellite and can help them further dwell into topic of 'Satellite Communication' .
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Satellite payload
- 2. Payload? Payload is the carrying capacity of an aircraft or launch vehicle, usually measured in terms of weight. A hosted payload is a module attached to a commercial satellite, particularly GEO, with communications circuitry that operates independently of the main spacecraft but which shares the satellite’s power supply and transponders. 23-11-2015EL 311-Fiber optics and satellite communication 2
- 3. Communication Payload THE PAYLOAD IS THE BUSINESS-END OF THE SATELLITE, CONSISTING OF: • REPEATER (MICROWAVE RECEIVERS, RF MULTIPLEXERS, POWER AMPLIFIERS, CHANNEL PROCESSING AND SWITCHING)., • ANTENNAS (REFLECTORS, FEEDS, FEED NETWORKS, SUPPORT STRUCTURE AND POINTING MECHANISMS). 23-11-2015EL 311-Fiber optics and satellite communication 3
- 4. TYPES Bent Pipe Processing • Non regenerative • Regenerative 23-11-2015EL 311-Fiber optics and satellite communication 4
- 5. LEVELS Transponder Architecture chain of units that supports a channel’s path through the payload The properties of the elements of one level flow to the elements of the other level 23-11-2015EL 311-Fiber optics and satellite communication 5
- 6. TRANSPONDER 23-11-2015EL 311-Fiber optics and satellite communication 6
- 7. THANK YOU 23-11-2015EL 311-Fiber optics and satellite communication 7 References:- Satellite communications payload and system-Teresa M. Braun https://en.wikipedia.org/wiki/Hosted_payload http://www.jsati.com/why-satellite-how-Spacesegment3.asp
Editor's Notes
- Payload is the carrying capacity of an aircraft or launch vehicle, usually measured in terms of weight. Depending on the nature of the flight or mission, the payload of a vehicle may include cargo, passengers, flight crew, munitions, scientific instruments or experiments, or other equipment. A hosted payload is a module attached to a commercial satellite, particularly GEO, with communications circuitry that operates independently of the main spacecraft but which shares the satellite’s power supply and transponders.
- Communications satellites are similar to other unmanned spacecraft, but are refined for the communications mission in GEO. Within the satellite are two major sections: The spacecraft bus (likewise, the bus). The communications payload (or simply, the payload). The payload is the business-end of the satellite, consisting of: Repeater (microwave receivers, RF multiplexers, power amplifiers, channel processing and switching). Contained within the repeater are the transponders, Antennas (reflectors, feeds, feed networks, support structure and pointing mechanisms). The antennas create "footprint" coverage but require the repeater to receive and transmit the actual signals from and to the ground.
- The bent-pipe is by far the most common payload type at present. A bent-pipe payload receives, filters, frequency-converts, switches, amplifies, and transmits signals via analog electronics. The processing payload has many elements in common with the bent-pipe payload but employs an onboard processor (OBP) to do more complex things than the bent-pipe can do. (1) the non-regenerative class that has reconfigurable switching, digital filters at radio frequency (RF) (the uplink or downlink frequency) or at intermediate frequency (IF), and/or reconfigurable beams; (2) the regenerative class that performs demodulation and remodulation at the least.
- (1)Transponder:which is the chain of units that supports a channel’s path through the payload, where a unit is something that performs one major function of the Transponder. (2) The properties of the elements of one level flow upward and/or downward to the elements of the other level.
- Receive antenna, which receives the signal from the uplink coverage area to the exclusion of other areas. Preselect filter, which suppresses uplink interference. Low-noise amplifier (LNA), which boosts the received signal to a level where the noise added by the rest of the payload units will not cause serious degradation, Frequency converter, usually a downconverter, to convert from the receive uplink frequency to the transmit downlink frequency. Input multiplexer (IMUX), a filter for separating out and/or combining channels. Preamplifier (preamp), which boosts the signal level to what the high-power amplifier needs to output the desired RF power. High-power amplifier (HPA), which boosts the signal level to what the transmit antenna needs to close the link. Electronic power conditioner (EPC) that provides power DC power to rest of the “HPA subsystem,” namely the preamp and HPA. Output multiplexer (OMUX), a filter for combining and/or separating out channels. Transmit antenna, which transmits the signal to the downlink coverage area to the exclusion of other areas.