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The INCO was the only position that uplinked commands to the orbiter. This position was a direct evolution of the integrated communications officer from the Apollo program. MPSR positions RF COMM: MPSR lead and responsible for the Ku-band and S-band communication systems. INST: Responsible for uplinking commands and telemetry flows.
These send a return signal that slowly changes in frequency, rather than time, hoping the radar's velocity gate will be pulled off the target in the same general fashion. Pull-off belongs to the wider family of "deceptive jamming" concepts that use details of the target radar to their advantage, rather than attempting to simply overpower the ...
A trans-lunar injection (TLI) is a propulsive maneuver, which is used to send a spacecraft to the Moon. Typical lunar transfer trajectories approximate Hohmann transfers , although low-energy transfers have also been used in some cases, as with the Hiten probe. [ 1 ]
Failed to perform mid-course correction, [24] remained in high Earth orbit until given escape velocity by orbital perturbation. [25] 24: Ranger 6 (P-54) Ranger 6: 30 January 1964: Atlas LV-3 Agena-B: NASA: Impactor: Spacecraft failure Impacted on 2 February 1964, failed to return images due to power system failure. [26] [27] 25: Luna E-6 No.6 ...
transmit commands to spacecraft. upload software modifications to spacecraft. track spacecraft position and velocity. perform Very Long Baseline Interferometry observations. measure variations in radio waves for radio science experiments. gather science data. monitor and control the performance of the network.
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A spacecraft's attitude must typically be stabilized and controlled for a variety of reasons. It is often needed so that the spacecraft high-gain antenna may be accurately pointed to Earth for communications, so that onboard experiments may accomplish precise pointing for accurate collection and subsequent interpretation of data, so that the heating and cooling effects of sunlight and shadow ...
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