5 ms·

> They arrayed three antennas together. No, they didn’t. The three antennas are in California, Spain, an Australia; they can’t all point at the same point in t

by Keysh 2y ago

> They arrayed three antennas together. No, they didn’t. The three antennas are in California, Spain, an Australia; they can’t all point at the same point in the sky at once, and even if two could do so, they’re not designed to work as an interferometric array.

drmpeg 2y ago
There's more than one antenna at each site. https://x.com/CanberraDSN/status/1851446497453494663 https://x.com/CanberraDSN/status/1851446497453494663 https://x.com/vlex26/status/1849618522823065655 https://x.com/vlex26/status/1849618522823065655
- Keysh 2y ago
  Ah, OK, thanks for the link.
shagie 2y ago
https://eyes.nasa.gov/apps/dsn-now/dsn.html https://eyes.nasa.gov/apps/dsn-now/dsn.html for the "what is it looking at right now" If you catch a site commutating with Voyager you will sometimes see it using two dishes... though most often it's just the one big one at the site. When they do, its not getting signal on two, but having one of the track the carrier wave (I think). https://www.cdscc.nasa.gov/Pages/antennas.html https://www.cdscc.nasa.gov/Pages/antennas.html ... and to "even if two could do so, they’re not designed to work as an interferometric array." They can. > The DSN anticipates and responds to user needs. The DSN maintains and upgrades its facilities to accommodate all of its users. This includes not only the implementation of enhancements to improve the scientific return from current experiments and observations, but also long-range research and development to meet the needs of future scientific endeavours. > Interferometry > The accurate measurement of radio source positions; includes astrometry, very long baseline interferometry, connected element interferometry, interferometry arrays and orbiting interferometry. Measurement of station locations and Earth orientation for studies of the Earth. > Very Long Baseline Interferometry > The purpose of the Very Long Baseline Interferometry (VLBI) System is to provide the means of directly measuring plane-of-the-sky angular positions of radio sources (natural or spacecraft), DSN station locations, interstation time and frequency offsets, and Earth orientation parameters.

by Keysh 2y ago

drmpeg 2y ago

There's more than one antenna at each site. https://x.com/CanberraDSN/status/1851446497453494663 https://x.com/CanberraDSN/status/1851446497453494663 https://x.com/vlex26/status/1849618522823065655 https://x.com/vlex26/status/1849618522823065655

Keysh 2y ago
Ah, OK, thanks for the link.

shagie 2y ago

https://eyes.nasa.gov/apps/dsn-now/dsn.html https://eyes.nasa.gov/apps/dsn-now/dsn.html for the "what is it looking at right now" If you catch a site commutating with Voyager you will sometimes see it using two dishes... though most often it's just the one big one at the site. When they do, its not getting signal on two, but having one of the track the carrier wave (I think). https://www.cdscc.nasa.gov/Pages/antennas.html https://www.cdscc.nasa.gov/Pages/antennas.html ... and to "even if two could do so, they’re not designed to work as an interferometric array." They can. > The DSN anticipates and responds to user needs. The DSN maintains and upgrades its facilities to accommodate all of its users. This includes not only the implementation of enhancements to improve the scientific return from current experiments and observations, but also long-range research and development to meet the needs of future scientific endeavours. > Interferometry > The accurate measurement of radio source positions; includes astrometry, very long baseline interferometry, connected element interferometry, interferometry arrays and orbiting interferometry. Measurement of station locations and Earth orientation for studies of the Earth. > Very Long Baseline Interferometry > The purpose of the Very Long Baseline Interferometry (VLBI) System is to provide the means of directly measuring plane-of-the-sky angular positions of radio sources (natural or spacecraft), DSN station locations, interstation time and frequency offsets, and Earth orientation parameters.