Erik,
https://filterpy.readthedocs.io/en/latest/kalman/KalmanFilter.html
has the documentation for a python implementation of kalman filters and
some good introduction.
Markus.
Am 19.04.2022 um 21:03 schrieb Erik Kaashoek:
> Tobias,
> Your Kalman post triggered me to study this "dummy" level in
Hi Carsten, Jim,
Am 19.04.2022 um 18:51 schrieb Carsten Andrich:
> Hi Markus, Jim,
>
> thank you for your responses!
>
> On 19.04.22 11:53, Markus Kleinhenz via time-nuts wrote:
>> I believe you will have a hard time finding a COTS solution that fits
>> most of your requirements.
>>
>> You will li
>>It was model FTS-1050A Disciplined Frequency Standard.
The FTS-1050A was the second product of Frequency and Time Systems Inc
(FTS) and appeared in the market around 1980. The instrument architecture
was the product of Martin Levine (of Levine and Vessot Gravity Probe A) as
implemented by Jerry
Tobias,
Your Kalman post triggered me to study this "dummy" level introduction
to Kalman filters: https://www.kalmanfilter.net/
and now I'm trying to write the Kalman filter.
An example of a Kalman filter described in the link above uses distance,
speed and acceleration as predictors for a one
That's an interesting old machine - very cool.
One thing though, is that unless I'm missing something, I believe the
two available loop time constants are in minutes, not seconds, or that
it should be in many more (maybe 100X) seconds, if stated that way.
Since the unit can synchronize to a 1
Joe,
Yes, going back many years on time-nuts, two desirable military grade
vintage portable quartz frequency standards were AN/URQ-10 and
AN/URQ-23. The latter contained a FE-1050A oscillator which could be
disciplined by an external reference. The manual goes into great detail.
[1] See espec
Hi Markus, Jim,
thank you for your responses!
On 19.04.22 11:53, Markus Kleinhenz via time-nuts wrote:
I believe you will have a hard time finding a COTS solution that fits
most of your requirements.
You will likely have to split your signal chain into multiple devices:
1. UBlox ZED-F9T based
Speaking of long time constant analog loops for oscillator disciplining,
see the attached PIX of the loop filter module from an FE AN/URQ-23.
Also a PIX of the schematic.
It is switch selectable for 1 or 100 Second time constants.
I is also hermetically sealed to prevent leakage effects as it u
On 4/19/22 2:53 AM, Markus Kleinhenz via time-nuts wrote:
Hello Carsten,
thats quite the set of requirements you got there.
I believe you will have a hard time finding a COTS solution that fits
most of your requirements.
You will likely have to split your signal chain into multiple devices:
1
Hello Carsten,
thats quite the set of requirements you got there.
I believe you will have a hard time finding a COTS solution that fits
most of your requirements.
You will likely have to split your signal chain into multiple devices:
1. UBlox ZED-F9T based GPS-Receiver with 1PPS out
2. Somethin
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