Engineering topics
Preston, R.
Publications and source records attributed to Preston, R..
Spacecraft tracking and navigation with the SKA
Explore the source record for details and available documents.
The Pearson-Readhead Survey from Space
We are using the VSOP mission to observe a complete sample of Pearson-Readhead survey sources at 4.8 GHz to determine core brightness temperatures and pc-scale jet properties.
Scientific Results from the VSOP Space VLBI Mission
Explore the source record for details and available documents.
Venus Stratospheric Sounder: First In Situ Measurements In Upper Cloud Region
Many major questions about the Venus stratosphere are still unanswered.
Venus Stratospheric Sounder: First in Situ Measurements in Upper Cloud Region
In spite of intensive ground-based and space observations, many major questions about the Venus stratosphere are still unanswered.
Space VLBI at Low Frequencies
At sufficiently low frequencies, no ground-based radio array will be able to produce high resolution images while looking through the ionosphere.
Low Frequency Radio Astronomy from Above the Ionosphere
Explore the source record for details and available documents.
The Astronomical Low Frequency Array: A Proposed Explorer Mission for Radio Astronomy
A radio interferometer array in space providing high dynamic range images with unprecedented angular resolution over the broad frequency range from 0.030 - 30 MHz will open new vistas in solar, terrestial, galactic, and extragalactic astrophysics.
Observations of Pearson-Readhead Survey Sources Using VSO and the EVN
Explore the source record for details and available documents.
A VSOP Imaging Survey
Explore the source record for details and available documents.
Detection of Extra-solar Planets around Radio-emitting Stars by VLBI
A planet orbiting a rado-emitting star can be indirectly detected by high-precision Very Long Baseline Interferometry (VLBI) astrometry through the reflex orbit of the star.
Full-Sky Imaging at Low Frequencies
Exploring the frequency range from a few tens of MHZ down to a few tens of kHz commonly requires multiple antennas operating as an aperture synthesis interferometer to obtain angular resolution. This design must overcome the corrupting effects of interplanetary scintillation, interfering signals and nearly isotropic antennas that see strong sources such as the Sun and Jupiter at all times.
Mars Geodesy Via Earth-Based Radio Tracking of Mars Landers
Explore the source record for details and available documents.
22 GHz VLBI Survey: Status Report and Preliminary Results
A ground-based VLBI survey to measure the visibilities and correlated flux densities in continuum at 22 GHz of more than 140 extragalactic radio sources has been conducted with baselines up to approximately 11 000 km. The project has been designed to help in preparation of target lists for VSOP and Radioastron Space VLBI missions as well as providing observational data for statistical study of structural properties at 22 GHz on sub-milliarcsecond scales for this large sample of extragalactic sources.
Discovery of Shell-Like Radio-Structure in SN 1993J
The radio-luminous supernova SN 1993J in M81 offers an unprecedented opportunity to study with high linear resolution the details of the growth of a supernova radio structure by means of the VLBI technique.