space VLBI
E499557
Space VLBI is a radio astronomy technique that extends very long baseline interferometry by placing one or more antennas in space to achieve extremely high angular resolution beyond the limits of Earth-based arrays.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
radio astronomy technique
ⓘ
very long baseline interferometry extension ⓘ |
| aimsFor | extremely high angular resolution ⓘ |
| appliesTo |
active galactic nuclei
ⓘ
compact radio sources ⓘ masers ⓘ pulsars ⓘ quasars ⓘ |
| comparedTo | ground VLBI ⓘ |
| dataProcessing |
VLBI correlator
ⓘ
fringe fitting ⓘ imaging and deconvolution ⓘ |
| enables |
baselines longer than Earth’s diameter
ⓘ
microarcsecond-scale imaging ⓘ |
| extends |
Earth-based VLBI baselines into space
ⓘ
very long baseline interferometry ⓘ |
| field | radio astronomy ⓘ |
| goal | resolve structure of the most compact radio sources in the universe ⓘ |
| hasChallenge |
complex correlation processing
ⓘ
limited downlink bandwidth ⓘ onboard data recording constraints ⓘ spacecraft pointing accuracy ⓘ |
| isLimitedBy |
available observing frequencies on spacecraft
ⓘ
launch and mission cost ⓘ spacecraft mission lifetime ⓘ |
| observes |
centimeter wavelengths
ⓘ
decimeter wavelengths ⓘ millimeter wavelengths ⓘ |
| offers | higher angular resolution than ground VLBI ⓘ |
| requires |
accurate time synchronization
ⓘ
correlation of space and ground data ⓘ global networks of ground radio telescopes ⓘ high-stability frequency standards ⓘ international collaboration ⓘ precise orbit determination ⓘ |
| supports |
astrometry of compact radio sources
ⓘ
measurements of brightness temperature limits ⓘ studies of jet formation in active galactic nuclei ⓘ tests of general relativity near compact objects ⓘ |
| uses |
antennas in space
ⓘ
ground-based radio telescopes ⓘ radio interferometry ⓘ |
| usesBaselineLengthsUpTo | hundreds of thousands of kilometers ⓘ |
| wasDemonstratedBy |
HALCA satellite
NERFINISHED
ⓘ
RadioAstron mission NERFINISHED ⓘ TDRSS Orbital VLBI experiment ⓘ VSOP mission NERFINISHED ⓘ |
Referenced by (1)
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