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Home Forums Radio Astronomy Group Communicating with Rosetta

This topic contains 6 replies, has 5 voices, and was last updated by  Tej 4 years, 4 months ago.

Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
  • #7239

    Clive Inglis
    Topics: 17
    Replies: 41

    I found this blog on the ESA website describing the how they communicate to the Rosetta spacecraft, Tracking Rosetta and thought it might be of interest.
    I find it amazing how they manage to work with such a weak signal, -225.69 dBW or 2.7E-23 W by the time it reaches earth and just 1,83 femptowatts after collection by a 35m diameter antenna! I like the comparison with mobile phone signal levels. Sounds like I could do with one of those cryo-cooled low noise amps to improve my mobile phone reception up here on top of the hill!

    • This topic was modified 4 years, 4 months ago by  Clive Inglis.

    Mike Meynell
    Topics: 119
    Replies: 756

    WTF is a femptowatt!! Far too small for me to contemplate.

    I can’t event get decent mobile reception if I move from one room to the other in my house.


    Brian Blake
    Topics: 188
    Replies: 409

    Mike Meynell
    Topics: 119
    Replies: 756

    Excellent. Now I understand.

    So 1 donkeypower* = 250,000,000,000,000,000  femtowatts.

    All makes sense now 🙂

    * Wikipedia defines 1 Donkeypower as 250 watts, if you don’t believe me!


    Brian Blake
    Topics: 188
    Replies: 409

    I am glad you clarified that as I was beginning to think you where boasting!!!!


    Andy Sawers
    Topics: 124
    Replies: 602

    I’m loving this.

    Tej, I think this is good source material for sci-fi characters’ names! Zeptowatt vs Yottawatt in Power to the Power of 21!

    What watt

    From http://en.wikipedia.org/wiki/Watt


    Topics: 39
    Replies: 597

    I think George Lucas already took a couple of those with a slight modding!  Andy, you’re the master of wordplay, I bet you would have come up with even better names!

    Actually, there’s an endless scope for us to contribute more to the scientific community, surely? <span style=”font-size: 13px;”>  Prepare to groan guys…</span>

    10!27 WW – whatawatt

    10!-27 wW – wizzowatt


    10!30 – SW – somewatt

    10!-30 – sW – sowatt

    OK…I’ll stop

Viewing 7 posts - 1 through 7 (of 7 total)

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