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From: | Marcus Müller |
Subject: | Re: Doppler |
Date: | Mon, 1 Jan 2024 22:11:23 +0100 |
User-agent: | Mozilla Thunderbird |
Liya,
Doppler shift Δf is proportional to both speed and carrier
frequency f₀
Δf = f₀ · v/c₀,
where v is the relative speed of your thing, and c₀ is the speed of light.
The highest frequencies we can, so far, do radio communications on, are in the range of f₀=150 GHz.
So, assuming you do communications on 150 GHz, for your Doppler
shift to be Δf=10 GHz higher after 1s, your acceleration
must been
a = Δf / f₀ · c₀ / 1s = 10 GHz / 150 GHz · 3·10⁸ m/s / s = 2/30 · 3·10⁸ m/s² = 1/15 c₀/s.
The fastest object mankind has ever built is the Parker Solar
Probe, which will burn up while it spirals into the sun, at a
maximum velocity of ca 1/15 of the speed of light. It takes it
years to reach that speed, not 1s.
So, you're assuming you're seeing a doppler from a satellite
rotating around earth that sees a relative acceleration higher
than a "satellite" around the sun actively being pulled into the
sun by the sun's immense gravity.
That sadly makes no physical sense!
Best regards,
Marcus
Yes I want to use 10GHz/s
On Sat, Dec 30, 2023, 4:05 PM Jiya Johnson <jiyajohnson10@gmail.com> wrote:
Greetings everyone,I went through these grc files and tried to do drift_simulation, i am not getting the way to get 10GHz/s using inspectrum and frequency sink slope calculation i have attached the grc and screenshots.
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