Guglielmo Marconi Orbiter - the first interplanetary communications satellite
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GMO Mars relay satellite↗
Engineering topics
Dionisio, C.
Publications and source records attributed to Dionisio, C..
G. Marconi Orbiter: the first interplanetary communications satellite
The GMO design team is developing standard processes and interfaces in cooperation with the designers of other Mars orbiters to enable relay users to easily access multiple relay orbiters.
GMO Mars relay satellite↗
G. Marconi Orbiter and the Mars Relay Network
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G. Marconi Orbiter Mars Relay Network↗
Prospects for high accuracy time dissemination and synchronization using coded radar pulses from a low-earth orbiting spacecraft
The radar (an acronym for radio detection and ranging) is an instrument developed just before the WW-II to precisely measure the position of an object (target) in space. This is done by emitting a narrow pulse of electromagnetic energy in the RF spectrum, receiving the return echo and measuring the time of flight in the two-way path from the emitter to the target. The propagation delay provides a measure of the range to the target, which is not in itself sufficient to uniquely locate the position of the same in space. However, if a directional antenna is used, the direction of the echo can be assessed by the antenna pointing angles. In this way the position of the target can be uniquely determined in space. How well this can be done is a function of the resolution of the measurements performed (range and direction, i.e.: angles); in turn, the resolution will dictate the time and frequency requirements of the reference oscillator.
Detoma, Edoardo V.↗
High resolution SAR applications and instrument design
The Synthetic Aperture Radar (SAR) has viewed, in the last two years, a huge increment of interest from many preset and potential users. The good spatial resolution associated to the all weather capability lead to considering SAR not only a scientific instrument but a tool for verifying and controlling the daily human relationships with the Earth Environment. New missions were identified for SAR as spatial resolution became lower than three meters: disasters, pollution, ships traffic, volcanic eruptions, earthquake effect are only a few of the possible objects which can be effectively detected, controlled and monitored by SAR mounted on satellites. High resolution radar design constraints and dimensioning are discussed.
Dionisio, C.↗