[AR] Re: GPS again....
- From: Lars Osborne <lars.osborne@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Mon, 3 Aug 2015 12:37:29 -0700
You can use an accelerometer to estimate doppler with the stationary
frequency source.
That would be great. It sounds hard though.
At that point, why not skip the ground station and try to compensate for
the crystal's frequency shift using the on-board accelerometers?
Thanks,
Lars Osborne
On Mon, Aug 3, 2015 at 12:48 AM, George Herbert <george.herbert@xxxxxxxxx>
wrote:
You can use an accelerometer to estimate doppler with the stationary
frequency source.
George William Herbert
Sent from my iPhone
On Aug 2, 2015, at 6:54 PM, Ken Biba <kenbiba@xxxxxx> wrote:
Perhaps. Below 500 m/s I simply do not see that.
Ken Biba
Novarum, Inc.
415-577-5496
On Aug 2, 2015, at 6:52 PM, Henrik Schultz <henrik@xxxxxx> wrote:
Doppler shift kills that idea - rocket is travelling away from frequency
reference at high velocity. Some are using that for determining speed, so
it is noticable.
/H
------ Original Message ------
From: "George Herbert" <george.herbert@xxxxxxxxx>
To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
Sent: 8/2/2015 6:23:42 PM
Subject: [AR] Re: GPS again....
Out of curiosity... Has anyone considered a different frequency source
while under acceleration?
Freerunning PLL? Have a crystal on the ground transmitting the frequency?
...
George William Herbert
Sent from my iPhone
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