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Thomas Telkamp

@telkamp.eu

165 followers 243 following 27 posts

Satellites, Radio Astronomy, SDR, Signal Processing, GPU. CTO Lacuna Space. Dwingeloo Radio Telescope.

Posts Replies Media

Thomas Telkamp @telkamp.eu · 29/11/2025

We hadden het er net vandaag over (Dwingeloo)...

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Thomas Telkamp @telkamp.eu · 05/10/2025

Receiving Voyager 1 just two weeks ago at Sternwarte Bochum and @amsat-dl.org!

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Thomas Telkamp @telkamp.eu · 26/09/2025

As shown by @coastal8049.bsky.social, nice rotational Doppler on IMAP.

Frequency of IMAP signal as received in De Bilt.

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Thomas Telkamp @telkamp.eu · 21/09/2025

It was a great day! We tracked Voyager-1 Doppler for more than 4 hours. During that time, it stayed well within 1 Hz of predicted values from the published trajectory.

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Thomas Telkamp @telkamp.eu · 25/05/2025

At even higher excitation levels (n=252) we can measure the radio emission in the UHF band (408 MHz).

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Thomas Telkamp @telkamp.eu · 25/05/2025

These lines are weak and take a long integration time (30 minutes+) to become visible. For comparison, this is the H167⍺ RRL at M17 at the same scale as the neutral Hydrogen (HI) profile at M17.

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Thomas Telkamp @telkamp.eu · 25/05/2025

They are essentially the radio counterparts of the Balmer series of lines (n=2), which are visible light lines. In L-band we can detect 4 of these lines, from different energy levels.

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Thomas Telkamp @telkamp.eu · 25/05/2025

Measuring Radio Recombination Lines (RRL) with the Dwingeloo telescope (@radiotelescoop.bsky.social), in the Omega Nebula (M17/W38).

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Thomas Telkamp @telkamp.eu · 18/05/2025

And the carrier still being received by the historic @radiotelescoop.bsky.social last week Wednesday!

Voyager carrier as received in Dwingeloo.

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Thomas Telkamp @telkamp.eu · 18/05/2025

So impressive. And we can still receive the Voyager 1 carrier with the historic 25 meter dish in Dwingeloo @radiotelescoop.bsky.social, as we demonstrated last week Wednesday.

Voyager 1 carrier as received in Dwingeloo.

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Thomas Telkamp @telkamp.eu · 15/05/2025

Just listening to the Voyager 1 signal on a Wednesday evening. More than 23 light hours away (25 billion km). Of course with the historic @radiotelescoop.bsky.social!

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Thomas Telkamp @telkamp.eu · 05/03/2025

Yesterday bouncing Zadoff-Chu sequences off the moon!

Delay-Doppler plot of Zadoff-Church sequence bounced off the moon.

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Thomas Telkamp @telkamp.eu · 07/02/2025

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Thomas Telkamp @telkamp.eu · 18/01/2025

Same data, but now with a predicted Doppler profile based on the (outdated?) TLE and an uplink lock on the ESA Santa Maria ground station in the Azores. Matches quite well.

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Thomas Telkamp @telkamp.eu · 17/01/2025

Hakuto-R M2 Doppler measured over 7 hours last night from NL.

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Thomas Telkamp @telkamp.eu · 09/01/2025

Live te zien in de @radiotelescoop.bsky.social !

Pulsar B0329+54 live view in the Dwingeloo Radio Telescope.

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Thomas Telkamp @telkamp.eu · 04/01/2025

We used the Dwingeloo Radio Telescope to repeat its discovery of the 3 kpc Arm of the Milky Way in 1957. And we can confirm it's still there! Yesterday's measurements (red +) overlayed on the graph from the original paper.

3 kph Arm graph from 1957 paper, with new measurements overlayed.

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Thomas Telkamp @telkamp.eu · 30/12/2024

Juno (Jupiter, 623 million km) on a 1.5m dish, incl. Doppler tracking:

Juno Doppler tracking comparison to Horizons.

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Thomas Telkamp @telkamp.eu · 10/12/2024

Yes! We received Voyager 1 on the Dwingeloo telescope! Not bad for a telescope from 1956 and spacecraft from 1977 📡🛰️ More at www.camras.nl/en/blog/2024...

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