Hi
The first question would be: where on earth are you? Next up would be
are there any test ranges nearby?
Bob
> On Feb 13, 2016, at 8:34 PM, Rob S. wrote:
>
>
>
> Hello Group,
>
> A friend about 2Km up the road from me and I both run the Trimble
> Thunderbolt GPSDO. For a few years now t
Not sure if it’s locale based, but for reference, my unit seems to be operating
normally here in Washington state, USA.
Nigel
> On Feb 13, 2016, at 17:34, Rob S. wrote:
>
>
>
> Hello Group,
>
> A friend about 2Km up the road from me and I both run the Trimble
> Thunderbolt GPSDO. For a few
Hi Bob,
about 100 Km South East of Melbourne AU in the sticks and no, no test
ranges nearby...
Rob.
On 2016-02-14 14:45, Bob Camp wrote:
> Hi
>
> The first question would be: where on earth are you? Next up would be
> are there any test ranges nearby?
>
> Bob
>
>> On Feb 13, 2016, at
Yes, all satellites dropped out from 00:16:51 to 01:54:02 UTC in Dallas,
Texas. Was tracking 5 sats then, poof, none.Global warming? Gravity
waves? More bogus GPS control segment uploads? Somebody gots some 'splain to
do...
__
At 07:34 PM 2/13/2016, Rob S. wrote:
Content-Transfer-Encoding: 7bit
Hello Group,
A friend about 2Km up the road from me and I both run the Trimble
Thunderbolt GPSDO. For a few years now they have both worked flawlessly.
Around 1/2 an hour ago ( I wasn't in front of mine when it happened ) at
Hello again Group,
Just an update, I let the Trimble sit for a for an hour or so and it's
status didn't change so I initiated a "Survey" and it is now back to
normal "seeing" satellites and has switched back into over detect mode.
I don't log the Trimble so I'm not sure what happened, possib
Hello Group,
A friend about 2Km up the road from me and I both run the Trimble
Thunderbolt GPSDO. For a few years now they have both worked flawlessly.
Around 1/2 an hour ago ( I wasn't in front of mine when it happened ) at
roughly 00:45 UTC the Mates went into "holdover" mode and reported "n
The ring-down is due to the combined BH ringing down from oblate to spherical
and rotateing while ringing.
The wave contains most of the lost mass/energy. There likely was also EM energy
radiated from the surrounding
BH disks, but not observed here.
Bill\
NL7F
On Sat, 13 Feb 2016 17:34:45 -0600
Hi
At least my simple take on it:
As they get closer, the rotation speeds up. It is no different than the ice
skater
pulling in their arms.
Once they get close enough, there are no longer two black holes. They have
become a
single black hole. They now radiate a “dc signal” that the detector
Bill,
As the two holes collapses into one larger hole, the rotation energy
goes from being a two-body rotation into being a one-body rotation. The
one-body rotation does not have the same characteristic as a massive
body moving swiftly back and forward from our observation and thus
producing
Bill,
The signal drops off because what was once two separate rapidly accelerating
orbiting binary black holes has now merged into fat one. They talk of inspiral,
merger and ringdown phases.
There's a 1 minute video http://www.ligo.org/science/Publication-NINJA2/ that
shows this nicely.
To me
IMHO, the decay seems backwards because we are watching the growth of
the event as the black holes approach each other, reaching a maximum at
collision.
Don't know why the signal drops off after the collision. May be because
gravity stops changing, or maybe because the resulting object left the
un
In message <1E75A9592178425ABD11390EB725D060@pc52>, "Tom Van Baak" writes:
>Yes, the interferometer is 4 km in length but they bounce the beam back
>and forth 400 times so the effective length is more like 1600 km. They
>keep the mirrors stationary to "picometers". They use hundreds of
Hi
Ok so checking the math to make sure I’ve got it. They start with a path that
is
(in effect) 1600 KM long. That’s 1.6x10^6 meters. They resolve something that
is in
the 1x10^-23 range. That would be 1x10^-17 meters.
Wikipedia confirms that a proton is at 0.87x10^-15 meters. The resolution
Hi Bill,
I don't think so; time and space are not related that way. Perhaps what you're
thinking is that changes in gravity make changes in time, as in gravitational
time dilation, or solid earth tides? The numbers are not favorable:
On earth, a 1 meter change in elevation causes a frequency sh
t...@leapsecond.com said:
> It's not just black holes (BH) but also neutron stars (NS)
If anybody is interested in neutron stars, the SLAC public lecture a few
weeks ago was very good.
Supernovas: Gravity-powered Neutrino Bombs
https://www6.slac.stanford.edu/community/past-lectures/superno
Hi Tom,
Thanks for posting this. I'm looking at the timelab plot, and the only thing I
can relate that to is a musical note played backward. IOW, the decay seems
backwards to me.
Bob - AE6RV
On Sat, 2/13/16, Tom Van Baak wrote:
Subject: Re: [ti
Hi Nick,
The time series, the frequency spectra, and the audio representation were all
fantastic. IR / optical / x-ray telescopes receive photons so it's natural to
think of your eye. But gravity waves are essentially a displacement so
technically "ears" are better suited than "eyes" for this.
If it were possible for time nuts to measure time differences to 10E-21,
could they have seen the effects of the gravity wave?
Bill Hawkins
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> How much of a shift did they actually see in their 2.5 mile long laser paths?
>
> The news article I saw talked about a distance change of “1/10, the size
> of a proton”. That didn’t seem to make much sense.
>
> Bob
Hi Bob,
The unit of measurement that gravity wave folks use is "strain"
I watched the video. It’s a spectacular discovery, no doubt. But the next day,
the headlines in the non-technical press were all about how we can now “hear”
the universe. The parlor trick the scientists did for the press conference was
what lead the news. I don’t know which side the face-palm sh
Hi Chris,
With a single event it's hard to know if luck was involved. But since the
recent upgrades, LIGO is much more sensitive than it was years ago -- so
detecting something this time was maybe not unexpected. Still, much of all this
is unknown which is why gravity wave (GW) research is so i
Tom,
Thank you for the heads up. I was most impressed by the amount of
correlation work or should I say anti-correlation to remove all possible
sources of noise contamination. Googling LIGO Hanforg or LIGO Livingston
lets us see the instruments directly.
Thanks,
Dale Cannon
-Origi
I've been wondering if this would ever happen in our lifetime. The
detector is good but still it requires such a huge and rare event to be
detectable as two black holes crashing into each other. How often does
that happen? Are black hole ever formed in pairs, if not a crash would be
very unlikel
I have to say, I'm hugely impressed by the Aeroflex 3413 I've bought and
Cobham's customer service response has so far been excellent but I suspect
it will be far too expensive for me to buy repair parts which is a shame.
On 13 Feb 2016 09:14, "Dave Brown" wrote:
> Cobham is a UK based defence a
Hello
I am looking for data on a Vectron 10 Mhz osc.
Model 271-2996
P/N 447-581
Cheers
Earl
VE7ZES
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Hi Charles,
an original manual is listed on ebay.
There are pdf's available for less money.
I don't know of any free downloads of Vol.2.
The 3048A system is running with a standard 3561A.
Cheers,
Adrian
Charles Steinmetz schrieb:
> I'm helping a colleague resurrect a hard-luck HP 3048A phase no
Cobham is a UK based defence and high end security supplier- originally
formed (not too many years ago) by their buying out of several other
companies in their lines of business. More recently they have got into
aerospace activities. As you might expect, they supply some rather
expensive and
Hi,
I had an interesting experience with a local cal lab when I took in my HP
5334B (Option 010). I'd recently purchased the unit and had no idea of its
calibration history. At the time I wasn't quite a time nut, and I didn't
own a reference to check frequency accuracy myself. I was hoping to get
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