GPS Timestamp / Event Horizon Telescope

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This morning I heard an article on the BBC about the Event Horizon Telescope. This is a project that connects radio telescopes all over the planet using GPS time to synchronize the data to create a virtual radio telescope the size of the earth, with increased resolution. That reminded me that at one time there was a possible use for the GPS in a FlexRadio to use timestamps for diversity reception on two (or more) separate radios. Does anyone know if anything has been done with this? Are the VITA packets timestamped with GPS times?
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Mark Erbaugh

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Posted 2 years ago

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Steve - N5AC, VP Engineering / CTO

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We have started time stamping the packets, but currently it is not done with the GPS -- we're doing it with the local clock so it's not terribly accurate.  We are working in this area though, including some recent work to tune the receiver accurately within a few hundred microhertz.  This work has been completed now and we're waiting on another project using the 6500 as a low-power ionospheric sounder to wrap up to get back on the other projects like this.  So we're still thinking about these things and making progress, albeit somewhat slow.
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Rory - N6OIL

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Steve gave a great talk this past weekend at the Yuma hamfest on this subject. Great job Steve thoroughly enjoyed it.
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Mark Erbaugh

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Is the talk available online?
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Andrew Russell

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Steve,
This is very cool. Are we there yet?!
As for frequency fine tuning have you seen this one?
http://www.qsl.net/zl1bpu/SOFT/click.htm
Andrew
(Edited)