¿ªÔÆÌåÓý

  1. Tinysa
  2. Messages
Single Messages Topics Expanded Polls

Locked Re: Measure frequencies down to 500khz with tinysa?

 

¿ªÔÆÌåÓý

Back 'in-the-day' I had to carry (transport) the 'flying clock' from Northwest to White-House (no not that wh house) to establish the exact 'phase' error for the ROTHR (Relocatable Over The Horizon Radar). Why? Yeah, that's another kettle of fish to digest. Bottom line, it had to do with the 'error' distance between the transmitter site at wh-house and our receiver site at NW. If you stuck your periscope out of the water 1000+ miles away and were traveling just over 5mph, (knots) well let's just say you now became a 'target' of interest. Yeah, Dave, then came GPS and the gee-dunk trips were over.

Mike C. Sand Mtn GA

On 10/5/2024 12:48 PM, W0LEV wrote:

Yes.? mHz is needed to "compete" in the FMTs.? However, we should use correct abbreviations for the units.?

Having once been professionally involved in precision timekeeping in the early days of GPS, I well appreciate error bars in the 10^-14 Hz (in the lab, only).? Of course, once on orbit, we had to correct for relativity.? Now we take GPS for granted.?

Dave - W?LEV

Dave - W?LEV

On Sat, Oct 5, 2024 at 2:14?AM Jim Shorney via <jimNU0C=[email protected]> wrote:

We all like to poke fun about this but if you ever participate in the FMT you actually do need milliHertz precision to get into the "green box".

On Fri, 4 Oct 2024 15:12:53 +0000
"W0LEV via " <davearea51a=[email protected]> wrote:

> QUOTE:? 200 mhz.
>
> 200 milliHertz?? That's the realm of earthquakes and subsonics!? Possibly
> you mean 200 MHz, MegaHertz.
>
> Dave - W?LEV

--

73

-Jim
NU0C







--
Dave - W?LEV
Join [email protected] to automatically receive all group messages.