Achim Vollhardt @dh2va

physics, hamradio (@amsatdl, #phase4a #qo100 design team member), paragliding Joined November 2013

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Achim Vollhardt @dh2va

14 hours ago

@Cmdr_Hadfield Are you in Switzerland now?

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Achim Vollhardt @dh2va

4 days ago

@AJamesMcCarthy Greetings from Switzerland!

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Achim Vollhardt @dh2va

4 days ago

Venus photobombing the Moon 😁

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Achim Vollhardt @dh2va

2 weeks ago

@DJSnM @AstroSamantha

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Interesting report on the cause of the failure of the 70-meter Goldstone DSN antenna last yr. The antenna over-rotated, causing $ millions of damage. NASA designated it a Type A Mishap. (I'm perplexed as to why so much is redacted.) nasa.gov/wp-content/upl… Snip:

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Achim Vollhardt @dh2va

a month ago

@planet4589 @LtColPhillips @AJamesMcCarthy may be of help here!

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Achim Vollhardt @dh2va

2 months ago

I assume you were involved in this @ChrisG_SpX. Great job.. and if not please pass along! Maybe most people do not comprehend the change about to happen but more will now after this clip.

SpaceX @SpaceX

2 months ago

Three years since the first flight of Starship, the next generation is here. New ship. New booster. New engines. New pad and new test site. SpaceX engineers are working to solve one of the most difficult engineering challenges in history: developing a fully, rapidly reusable

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Achim Vollhardt @dh2va

2 months ago

@Scivf4 The label says @StarragGroup , isn't this Switzerland?

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Achim Vollhardt @dh2va

2 months ago

@Amsat_hb @UZH_ch @SRF Einen grossen Dank von mir an Angelika Kren vom @SRF für den Beitrag!

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Achim Vollhardt @dh2va

2 months ago

That's a wrap! Final radio tracking pass for Zurich for the @NASAArtemis II mission just ended. It's been a joyride for us to follow the mission, learned so much. Wishing @astro_reid @AstroVicGlover @Astro_Christina @Astro_Jeremy a successful return! And thanks for the fish!

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Achim Vollhardt @dh2va

2 months ago

@joebarnard Leaving solids behind and going liquid? Yeah!

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Achim Vollhardt @dh2va

2 months ago

@xjamesmorris Please DM me, concerning Artemis II TDM.

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Achim Vollhardt @dh2va

2 months ago

@ShadowWolf_Kell @NASASpaceOps --.- ... .-..

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NASA Space Operations @NASASpaceOps

2 months ago

As the Artemis II crew travels through space, 34 selected volunteers - from ham radio enthusiasts to commercial service providers - are attempting to passively track the Orion spacecraft. The data collected will help NASA better understand industry’s tracking abilities. Learn more: go.nasa.gov/4v45zQy

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Achim Vollhardt @dh2va

3 months ago

@uhf_satcom "My" first dog (actually the neighbors dog) was exactly that breed. We grew up together. Still have lots of great memories about her. All the best Paul.

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Achim Vollhardt @dh2va

3 months ago

@pintleinjector @Meatloaf_TTV State vectors here: ssd.jpl.nasa.gov/horizons/app.h…

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Achim Vollhardt @dh2va

3 months ago

@space_pir4te @amsatdl @SternwarteBO ssd.jpl.nasa.gov/horizons/app.h…

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AMSAT-DL @amsatdl

3 months ago

In preparation for Artemis II, the Bochum and Dwingeloo radio telescopes, configured as an interferometer, jointly observed quasar J2136+0041 at S-band. The radio waves from this very distant quasar have been travelling through the universe for 10 billion years before being captured by our SDRs, and correlated between the sites. This is more than twice the age of our solar system! (Team: @SternwarteBO @radiotelescoop @telkamp Peter Gülzow, DB2OS)

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Achim Vollhardt @dh2va

3 months ago

@amsatdl Amazing, congrats to both teams! With this SNR, I am tempted to join. My antenna is measly but my time base is certainly fine. Where can I read more about the technical details?