Measurement of Wind Velocity using VLA Phase Data

Details Measurement of Wind Velocity using VLA Phase Data Measurement of Wind Velocity using VLA Phase Data

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.5415b&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #54.15; Bulletin of the American Astronomical Society, Vol. 28, p.906

Astronomy and Astrophysics

Astronomy

Scientific paper

Path delays due to atmospheric fluctuations over the VLA create errors in the phase data leading to errors in images. Determination of a phase reference allows direct estimates of atmospheric fluctuation patterns from the phase data. Such atmospheric patterns have traditionally been analyzed using full correlation analysis, but non-stationarity of the phase data prohibits accurate measurements. A new method has been developed that directly compares portions of time series data. By transforming the phase data from a time series to a spatial pattern, we can directly compare two overlapping sections of the sky pattern on the VLA arms. However, unlike full correlation methods, the new method does not provide any information about the blobs themselves. The difficulty in the method is in the visual interpretation of the comparison. Simulation results show that the method is far superior to correlation methods for data that contains few (0-3) blobs. The new method provides more consistent results when applied to VLA phase data than do full correlation techniques. The results obtained show a correlation between surface wind direction and phase-measured wind direction. Additionally, the new method straight- forwardly provides an "image" of irregularities.

Affiliated with

Also associated with

No associations

Rating

Measurement of Wind Velocity using VLA Phase Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of Wind Velocity using VLA Phase Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of Wind Velocity using VLA Phase Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1354273