143 MHz interferometer update - comparisons of two sidereal days

27 views
Skip to first unread message

David Lonard

unread,
Mar 29, 2022, 3:55:24 PM3/29/22
to Amateur radio interferometry
Hello everyone,

Here is some more data from my interferometer in a 340 meter baseline configuration.

By comparing the data across sidereal days, I think it should be a sensitive instrument to detect transient sources and to characterize interferometer phase instabilities.

See the the attached data.

David

340meterbaseline.pdf

David Lonard

unread,
Mar 30, 2022, 11:20:41 AM3/30/22
to Amateur radio interferometry
Here is a 1D phase plot from the complex visibility filterbank data that I showed yesterday to provide a more 'classical' representation of the fringing in my 340 meter baseline interferometer, focused on when Cyg A and TauA were visible to the interferometer. 

The plots represent an integration of 400 kHz bandwidth ( 4% of my interferometer's total bandwidth). Even with this restricted bandwidth, fringes are seen throughout the sidereal day with my 3 element Yagi antennas.

David


CasA143MHz.jpeg
TauA143MHz.jpeg
Reply all
Reply to author
Forward
0 new messages