It may be a downconverter rather than a filter some GPS time systems notably
ones by true time used an active down converter to transform signal to baseband
for long cable runs. Voltage to converter was rather high as I recall
Sent from my iPhone
On Feb 21, 2014, at 6:21 PM, Pete Lancashire
Actually traceability of parts for maintenance has nothing to do with unions
and national security. It has everything to do with failure analysis.
If a part fails it's entire path from manufacturer to maintanance and repair
shops can be traced so if a part starts experiencing failures at Sn
Attila
You might want to look at the N2PK and DG8SAQ vector network analyzer projects
there are also some commercial USB based 'personal' network analyzers out there
starting about 6K
As for directional couplers. I would suggest buying vs building Mini Circuits
has a line of high quality
The 8410 is what I started on. Still have the hp 85 automation manuals program
listings and tapes.And the hp ad converter used to convert plotter output
lines to GPIB readable data
the 8410 allowed one to really UNDERSTAND the network analysis process at a
very basic level. If you can
on
earth that might actually mean.
Regards
Paul
WB8TSL
On Tue, Jun 3, 2014 at 12:57 PM, Dr. David Kirkby drkir...@gmail.com
wrote:
On 3 June 2014 16:54, Scott McGrath scmcgr...@gmail.com wrote:
Where are the software options for the 8753 coming from. Agilent will
not even talk about
Hui
That calibration procedure is meant to be run at the beginning of every
critical measurement run and when ambient conditions change more than a few
degrees.
Sent from my iPad
On Jun 29, 2014, at 11:33 AM, Hui Zhang ba...@163.com wrote:
Hello:
I am afraid I made a dumb mistake, I
Since Cloudflare has a paid service as well the working assumption is the
'free' service is more of a try before you buy and allows colleges and others
to demonstrate the value of the service so budget can be requested. I'm sure
the analytics are not as detailed as the paid version etc
The hidden pages are generally because seller specifies they don't ship to
those countries.
I don't sell outside of US and Canada Mexico (NAFTA) because USG requires me
to maintain export documentation for 7 years for anywhere else and like all the
other USG export regs it's a felony if
I've had a few of these over the years and option 001 is indeed a TCXO.
Best bet for calibrating the TCXO is removing it from 5300B and tweak the osc
on the bench
Also remember these were designed as service grade counters for land mobile
service not lab grade instruments. There are battery
The datum tubes are fairly common as they were significantly less expensive
than HP/Agilent tubes and lasted longer
First thing as JL notes is to remove battery and charger
Just power it up and monitor the ion pump value on the test meter if it drops
to zero fairly rapidly the tube may still
Option 4 is the high performance beam tube which traded shorter life for better
performance. It referred to the original tube shipped with the standard
Not sure about j15
Sent from my iPhone
On Nov 6, 2014, at 5:34 PM, Wayne Holder wayne.hol...@gmail.com wrote:
Thanks for all the great
The only problem with these standards is the tube availability since they have
that neat little rom which allows the standard to recognize the tube.
So using available non-5071 tubes is a challenge unless someone solved the
rom issue
But the first one is pretty beat did someone have a bad
I've taken a hybrid approach I'm using an in circuit ESR meter to determine
whether cap needs to be replaced
Tantalum capacitors usually fail because of running them too close or at rated
voltage. HP unlike others in the industry did not tend to do this so I've had
a low incidence of
I've got a few of the 5342s their weak point is the sampler. It can be fixed
if you have a die bonder all of mine have the option 1 which is either a 10544
or 10811 depending on vintage
The 535x series are nice counters I've got a couple. The bad thing is parts are
even less available
Batteries Plus in the US builds nicad packs to order they have built packs for
my 105 and 5065a and 5061a packs with original specification cells
Sent from my iPhone
On Nov 1, 2012, at 5:27 PM, Attila Kinali att...@kinali.ch wrote:
On Thu, 01 Nov 2012 21:51:21 +0100
Magnus Danielson
Plus since shipping is not involved. You should check your
local yellow pages to see if you have a 'Battery Warehouse' type store.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Scott McGrath
Sent: Thursday, November 01, 2012
Or install a frosted dome type skylight as a radome lights the attic and allows
for better reception
Sent from my iPhone
On Nov 25, 2012, at 10:15 PM, J. Forster j...@quikus.com wrote:
There are ways to do it w/o drilling holes. Most all houses have vent
stacks for the plumbing, typically 3
They are no harder than a chimney to keep leakproof unless they are flush in
which case everything said is true. You need structure and a leakproof
membrane and proper flashing to redirect water
Sent from my iPhone
On Nov 26, 2012, at 10:38 AM, J. Forster j...@quikus.com wrote:
I
And proprietary security schemes always fail due to insufficient vetting.
Security by obscurity is not security at all IPsec is secure because it it's
inner workings are there for all to see and it's never been broken the
compromises have happened because of poor key management not because of
All of these attacks the clock would notice and probably go into holdover So
far these attacks do not allow the time product to be altered in a
deterministic manner
Sent from my iPhone
On Dec 3, 2012, at 1:46 PM, Don Latham d...@montana.com wrote:
Well, if it's the current set of ruffians
I think this class of attack would be directed along the order of financial
crimes or industrial espionage where you want to hide the audit trail or
convince a database that the update is legitimate
We really need to think more about the secure distribution of time products
In the past in
Some RSA fobs do have a keypad. System prompts you to enter a number on keypad
and you enter the tokencode which is generated. More secure less predictable.
Or you enter a pin and token generates tokencode
Sent from my iPhone
On Dec 4, 2012, at 5:57 AM, Jim Lux jim...@earthlink.net wrote:
NTP servers. A way to hack them is to connect to one with a hostile server with
higher stratum as NTP servers are configured as 'peers'Without the md5 you
can steer a server with md5 the servers just ignore the attacking server
Sent from my iPhone
On Dec 3, 2012, at 7:00 PM, Harlan Stenn
The key here is to step the time a few milliseconds at a time as ntpd has
various sanity checks.
Sent from my iPhone
On Dec 4, 2012, at 3:22 PM, Hal Murray hmur...@megapathdsl.net wrote:
server
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To
GPL and Open Source are frequently confused technically any code where the
source code is available to the customer is open source. As in open for
inspection, under terms agreed to in the license.
What most people think about when they hear about open source is code released
under variants of
. That code
was 'Open Source' e
Sent from my iPhone
On Dec 7, 2012, at 12:09 PM, David Kirkby david.kir...@onetel.net wrote:
On 7 December 2012 15:00, Scott McGrath scmcgr...@gmail.com wrote:
What most people think about when they hear about open source is code
released under variants
as
'open source'.
Sent from my iPhone
On Dec 7, 2012, at 1:25 PM, Mike S mi...@flatsurface.com wrote:
On 12/7/2012 4:08 PM, Scott McGrath wrote:
that was my point code is open source means open for inspection by
end-user. The tool chain is irrelevant unless it comes from GPL or
similar
In a prior life we had a CDMA timing receiver for NTP which used VZ for its
source
Sent from my iPhone
On Dec 15, 2012, at 12:18 PM, Graham / KE9H time...@austin.rr.com wrote:
Greg:
You should switch to Verizon.
They are inherently accurate to milliseconds.
Sub micro-seconds inside the
All this ties back to the US fascination with financial engineering which got
rolling in the 80's. and the deregulation of the financial markets. Back when
most companies were funded by debt The banks had a vested interest (sic) in
making sure companies had a healthy pipeline and good long
Recall that the UK chains are being reactivated with eLORAN b/c UK and France
don't want to be dependent on a space based system. This at least explains
the Austron units which will be useful again shortly
Sent from my iPhone
On Jan 16, 2013, at 4:20 PM, Joseph Gray jg...@zianet.com wrote:
Don't forget the ion fountain to check the H Maser :-)
Sent from my iPhone
On Jan 23, 2013, at 5:35 PM, J. L. Trantham jlt...@att.net wrote:
Russ,
You might want to consider stopping to think about it now. Otherwise,
you'll wind up with a Cesium Standard to check the GPSDO, a collection
Panasonic has a registry hive to fix the psychomouse issue on toughbooks with
integrated gps use the Panasonic.ca site much better organized than the us site
Sent from my iPhone
On Jan 25, 2013, at 7:12 AM, Arthur Dent golgarfrinc...@yahoo.com wrote:
Besides the previous mentioned Time-Nuts
Try a AO PhaseStar phase contrast microscope they are relatively cheap on eBay
and they should be more than adequate for beekeeping. The phase contrast
feature allows you to see celluar details without staining in most cases
Most of them have fittings for camera tubes so photomicrography is
Liquid acetone requires special handling and pressurized cells to keep it from
explosively disassociating. Ammonia also requires pressure vessels and in
pure form is incredibly corrosive
So unless you are trained in these techniques just don't even think about doing
this
Sent from my iPhone
Yes I meant acetylene iPhone 'helpfully' corrects
Sent from my iPhone
On Jan 27, 2013, at 2:08 AM, Charles P. Steinmetz
charles_steinm...@lavabit.com wrote:
Scott wrote:
Liquid acetone requires special handling and pressurized cells to keep it
from explosively disassociating.
Did
I think you missed my reply where iPhone helpfully corrected acetylene to
acetone I do know the difference
Sent from my iPhone
On Jan 27, 2013, at 12:21 PM, J. Forster j...@quikus.com wrote:
Nope. Acetone is a solvent you can buy at Home Depot or CVS (as nail
polish remver).
Liquid
Have you actually tried to 'beat' a watch. Most of these devices use a audio
pickup and sense the mechanical impulse from the drive system. They then
indicate whether the watch is fast or slow
I have one which uses the sound card to do the dsp and the secret sauce is the
pickup and
Think OP has the Choice of 3 bands
Sent from my iPhone
On Feb 5, 2013, at 12:32 PM, Chris Albertson albertson.ch...@gmail.com wrote:
On Mon, Feb 4, 2013 at 9:17 PM, Hal Murray hmur...@megapathdsl.net wrote:
Can you re-transmit on a nearby frequency without blasting the receiver off
the
Recommend doing a reset to default and configure as directed there are a lot of
configurable options which can control access to this box
Sent from my iPhone
On Feb 22, 2013, at 7:22 AM, Martin A Flynn mafl...@theflynn.org wrote:
On 2/21/2013 10:16 PM, Mike S wrote:
On 2/21/2013 10:05 PM,
Ill see if I can dig up my manual for this used these units a few years ago
Sent from my iPhone
On Feb 22, 2013, at 9:10 PM, Martin A Flynn mafl...@theflynn.org wrote:
Scott,
Can you point me at the appropriate documentation so I can default the unit?
Martin
On 2/22/2013 1:06 PM, Scott
There is a company Death Switch which offers a service which sends out an email
or multiple emails upon your demise or incapacitation
The basic idea if you keep sending the service keepalives it does not send the
email. Sort of like a dead mans switch on a locomotive
Sent from my iPhone
On
There are those of us who write code to solve a problem and post it so others
can use it as is or as a starting point for their own code.
Has nothing to do with ego boosting has more to do with paying it forward for
all the snippets of code and diagrams we used in the past to jump start
Same here
If you are building apps for apple you don't have any options other than to use
XcodeFor portable code just use GNU autoconf to build GCC
Sent from my iPhone
On May 20, 2013, at 1:39 PM, Chris Albertson albertson.ch...@gmail.com wrote:
If you are going to produce Mac or IOS
PC clocks are cheap and not intended to be accurate, it's why time
synchronization is one of the things managed when a windows machine joins an AD
domain. As AD uses multi-master replication accurate time stamps are required
for normal operation
Best recommendation is to run NTP not SNTP as
http://mpqu.livejournal.com/42997.html 35781
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and follow the instructions there.
Hi,
Name is Scott McGrath and I am a fellow time nut who in addition to
playing with precise timing also plays with clocks!.
My current collection of standards includes the following
HP 105B
HP 117A
HP 5061A
HP 5065A ( dead physics package unfortunately )
Austron 2100F (sold to me as a T
Hi,
Need a manual for a 5065A Prefix 1840A Rb frequency standard -
I have the preliminary manual but this does not cover the late version
with digital clock.I am in the process of digitizing the
preliminary manual and will make it available will probably upload to
ko4bb's manual site as well
All,
I purchased a 117A at a hamfest years ago and am just now looking into
it. This 117A is a bit different from the ones in the manual and
in pictures up on the web as it incorporates a telechron reduction
motor installed in fthe area in front of the TRF module harness
connector. Had
Tom,
Since everything is now UTC is it worth preserving this electric
offset system ?It would certainly be a neater package if the TRF
module actually fit within the case! My thoughts were to combine
this with a 105B
On Mon, Sep 8, 2008 at 4:45 PM, Tom Van Baak [EMAIL PROTECTED] wrote:
The interlinked cup hooks are a fuse or fusible link. there may be
others as EIA only standardized symbols in the late 60's and Mid 70's
Just look in older HP documentation and see how many symbols they
used for zener diodes!.
On Wed, Sep 10, 2008 at 1:12 PM, David C. Partridge
[EMAIL
with this stuff!
- Regards Scott
On Thu, Sep 11, 2008 at 10:50 AM, [EMAIL PROTECTED] wrote:
Scott,
Good luck on the rare 117A.
Did you get my e-mail with attachment containing the pages of the manual for
your updated unit?
Russ
-Original Message-
From: Scott McGrath [EMAIL
of the
GR Frequency Standard, I replaced a number of carbon resistors that had
changed value over time, most likely from abuse.
Enjoy! Let me know how I can assist.
Russ
-Original Message-
From: Scott McGrath [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; time-nuts@febo.com
Sent: Thu
I am having a problem with the 50 Mhz reference oscillator as it
generates a frequency of 47.5 to 49.995 Mhz depending upon setting of
R110. Q9 is dissipating excessive power and is hot to the touch
A9 collector bias is at 11.5 instead of the proper 11.0 and emitter
bias is at -.65V.base
Symmetricom is a sales organization - tech support for non-contract
customers is iffy at best.We use symmetricom NTP servers some of
which have gone obsolete and the only support we get is calls from the
sales dept asking when are we going to replace them (we do have a
contract).
I really
All,
Does anyone have the manual pages for the option H66 variant of the
5061A this unit has options 1-4 which include the high performance
beam tube,I have the 5061A manual for prefix 1740 but no data on
the h66 variant.
I dont recall but I believe I downloaded the manual from John's site
Test
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and follow the instructions there.
All,
Recently purchased a 5061A with a option 004 beam tube yes, yes I know
about the lifespan of these tubes (anyone have any spares for sale?)
however the tube looks MUCH newer than the 5061A Ion pump is about 10
at turn on and drops to near zero after an hour or so.
Hot wire ionizer
Your local Batteries Plus franchise will rebuild the pack for about 80
bucks this is what I did with mine. If it's been removed the specs
are as follows.
NICAD
2.2 AH
24 VDC Nominal
New ones from Agilent are in the 'don't even ask price category'
On Tue, Sep 30, 2008 at 1:48 PM, [EMAIL
How does one increase the EM voltage?
I do have the manual and I have done the LF test but the ionizer and
mass spec voltages were what I was looking for
On Tue, Sep 30, 2008 at 1:11 PM, corby d dawson [EMAIL PROTECTED] wrote:
Scott,
The -.210 v one the multiplier is OK for now. The tube
worked at Collins Radio in years past and when I had
to go to HP with a part or manual request, it was cheaper to ask for a
'sample.'
Thanks again.
Bill
W5STP
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Scott McGrath
Sent: Tuesday, September
What batteries plus does is replace the cells in the original housing
and they can rebuild just about anything that uses batteries. We
have one in Manchester NH and I use them a lot.
On Tue, Sep 30, 2008 at 2:40 PM, Bill [EMAIL PROTECTED] wrote:
Brooke:
Thanks for the rapid response. I
Ah,
I do have the 2 resistors on the A15 - I do have the late model oven
controller so my ionizer shoud be DC correct?
Now the only problem which remains is the sourcing of a spare tube
- Scott
On Tue, Sep 30, 2008 at 2:58 PM, corby d dawson [EMAIL PROTECTED] wrote:
Scott,
I'm not sure how
You mentioned building a -3500 volt supply - why not use one of the
Ion pump supply units?
On Tue, Sep 30, 2008 at 3:14 PM, Scott McGrath [EMAIL PROTECTED] wrote:
Ah,
I do have the 2 resistors on the A15 - I do have the late model oven
controller so my ionizer shoud be DC correct?
Now
It depends on how accurately you want to measure the oscillator
frequency with your approach short term you probably would not be able
to measure the oscillator offset any better than a few parts in 10-5
longer term probably a few parts in 10-7 might be possible as you
could compute the allen
Was this the pretty one on Ebay? - you really, really need to open it
up at least to ensure nothing came adrift in shipping, I'll second Tom
on the sheer coolness of the 5061B but also remember most of the
components in a Cesium beam fall under the category of Unobtainium
so you will want to
, this was the one on e-bay. Was I bidding against you?
Jeff
Jeffrey K. Okamitsu, PhD, MBA
+1-609-638-5402
--- On Thu, 10/2/08, Scott McGrath [EMAIL PROTECTED] wrote:
From: Scott McGrath [EMAIL PROTECTED]
Subject: Re: [time-nuts] AC Connector On HP 5061B
To: Tom Van Baak [EMAIL PROTECTED
My Austron 2100T outputs have significant noise on the peaks of pulses
and square wave output,Is this normal or is this a fault I need to
correct other than that it works quite nicely and I am usually locked
to Nantucket MA or Seneca NY if Nantucket is out of service
Thanks Scott N1JIN
frequency sensitive test
equipment. (spectrum analyzer, network analyzer, synthesized signal
generator, and frequency counter).
Jeffrey K. Okamitsu, PhD, MBA
+1-609-638-5402
--- On Thu, 10/2/08, Scott McGrath [EMAIL PROTECTED] wrote:
From: Scott McGrath [EMAIL PROTECTED]
Subject: Re: [time
Tom,
You are correct - I let my college years buidling coincidence
detectors in college for the GRO-COMPTEL as well as television
broadcast engineering. in both applications it mattered whether all
instruments used were in precisely defined phase relationships and I
have been letting this
What do you need to know about NTP on IOS? - I've been working with
Cisco gear longer than I care to admit and have a bunch of CC*
certifications but that's not relevant here
Generally IOS devices actually speak SNTP - Not sure whether they can
use an external reference clock I don't think so BUT
We have the time vault units - soon to be replaced with 3500's with Rb
Oscillators.
The 'downconverter' is an amplifier used for long cable runs and the
power injection is changed as well.I would measure what the
NTS-100 is actually putting out without the downconverter our
NTS-300/TimeVault
Did you try the LF injection test?
On Sun, Oct 5, 2008 at 8:48 AM, Jeffrey Okamitsu [EMAIL PROTECTED] wrote:
I've spent a good deal of time this weekend working with the 5061B I recently
acquired.
The unit appears to be making stable 10 MHz. I've compared it the the
Rubidium source I
[EMAIL PROTECTED] wrote:
Might it be possible a word of caution is in order?
Was not a downconverter used with the old GOES (L-band) Truetime satellite
equipment. That would not be the same as the down converters used on gps.
Just a thought.
Phil
- Original Message -
From: Scott
I have a 2100 I'll see if my EPROM programmer still works and try and
download the EPROMS to a .HEX file and If I can do that i'll send them
along to Didier and Brooke so they can be hosted for posterity.
- Scott
P.S.
Does anyone have the part number for the 24V cannon connector on the 2100
Yes -
PCI (Payment Card Industry) for one, Active Directory for another that
needs timing withing 30 seconds - why do you ask?.
On Mon, Nov 3, 2008 at 12:03 PM, Gretchen Baxter
[EMAIL PROTECTED] wrote:
Greetings,
There are a lot of regulations that mandate synchronized time.
But do any of
That is due to the wonders of HF propagation.WWV is in Ft Collins
WWVH is in Hawaii so coverage is largely restricted to Asia/Pacific
region
somewhere on NIST's site there is a propagation prediction for all the stations.
On Thu, Nov 20, 2008 at 1:40 PM, Brad Stockdale [EMAIL PROTECTED]
Register on their site and get the firmware updates from the web site,
On Mon, Mar 23, 2009 at 3:10 PM, Thomas Folkers
tfolk...@email.arizona.edu wrote:
On Mar 22, 00:00 UT, both of our Datum 9390 model GPS receivers/time
code generators started producing erroneous day of year and actual
I would be interested in the FTS4040A - need to figure out shipping
cost to 03303 - Greyhound is another option
- Scott
On Mon, May 11, 2009 at 6:02 PM, Bill Hawkins b...@iaxs.net wrote:
Group,
Lack of space has become the primary problem here.
I will be at a flea market in Plymouth, MN, at
How long before DHS contracts out 'new' eLoran to private company for 1-2
billion per year. Inquiring minds want to know.
Makes you wonder whether shutdown of LORAN was to kill a simple effective
system which cost 32 million to run by USCG so the Beltway bandits would have
another cash cow
How are those of you dealing with traceability in the commercial space after
loss of LORAN and WWVB
I as does everyone here know that both a Cs and H-maser are both primary
standards
This is how does one do the contract/purchasing agent checkbox 'is traceable to
NIST Yes or No'
Back in the
True
However with LORAN and to a lesser extent WWVB traceability process was
well/known and documented and had been in place for decades and was easy to
implement correctly With GPS not so much especially with S/A. Supposedly
the new satellites don't have S/A but since the GPS satellites
In the case the lab in question was accredited and we went through the audits
of process and procedure and go through them to this day and we have the nice
certs on the wall.
When LORAN went away we then had to use very expensive processes to MAINTAIN
that traceability and accreditation which
….
On Jun 1, 2013, at 3:02 PM, Scott McGrath scmcgr...@gmail.com wrote:
True
However with LORAN and to a lesser extent WWVB traceability process was
well/known and documented and had been in place for decades and was easy to
implement correctly With GPS not so much especially with S
Sounds like a space based systemPerhaps those mining probes
Sent from my iPhone
On Jun 14, 2013, at 2:11 AM, saidj...@aol.com wrote:
Greg,
the only power source I am aware off that can provide the ~5W power
required by that Novus box for 10-12 years with 20lbs weight limit without
These are not the greatest transmitters high school radio station had something
similar.You might try creating a rudimentary oven for crystal use a
bimetallic switch if you want authentic otherwise transistor circuit to control
heater
Did something similar with my Swan 250 years ago. It
Why many US sellers will not ship internationally. It's fun to bash Americans
because most of them don't have a passport but that's not the reason in this
case.
It's simple paperwork which must be maintained for inspection by a bunch of
federal agencies for a minimum of 7 years. And may
Moles are a bit small it would probably work better for woodchucks. who are in
the process of undermining all lawns in neighborhood now.
In a more serious vein most ground penetrating radar is low frequency and I was
not aware that THz waves could penetrate ground more than a few CM
Scott
You might want to look at what these guys have done for 40 years or so.
Www.geophysical.com
They have the ability to embed GPS coordinates while recording.
Sent from my iPhone
On Jul 21, 2013, at 4:55 PM, Jim Lux jim...@earthlink.net wrote:
On 7/21/13 1:35 PM, Tom Van Baak wrote:
when I'm
10:39 AM, Scott McGrath wrote:
Moles are a bit small it would probably work better for woodchucks. who are
in the process of undermining all lawns in neighborhood now.
In a more serious vein most ground penetrating radar is low frequency and I
was not aware that THz waves could penetrate
Key here is how does the captain know that GPS is no longer providing an
accurate fix? You need 2 or more independent systems to cross check each
other.
Sent from my iPhone
On Jul 27, 2013, at 12:21 AM, Jim Lux jim...@earthlink.net wrote:
On 7/26/13 8:45 PM, J. Forster wrote:
I gather
a couple of meters per
hour), think submarines, etc.
Using a dual sensor navigation system (or timing system! ), such as
GPS/eLORAN, would obviously make the system so much more robust.
Michael / K7HIL
On Sat, Jul 27, 2013 at 6:43 AM, Scott McGrath scmcgr...@gmail.com wrote:
Key here
large or expensive would be required. The same sort of
malfunctioning this or that took out Loran from time to time over harbor
sized areas. Loran had so many issues with dropping out, that they simply
were not worth talking about ….
Bob
On Jul 27, 2013, at 1:35 PM, Scott McGrath scmcgr
/ could work with a *much* smaller antenna if a local
area was the target. Power is easy at 100 KHz. Loran is no easier / harder to
DF than GPS.
Bob
On Jul 27, 2013, at 3:37 PM, Scott McGrath scmcgr...@gmail.com wrote:
LORAN was/is not perfect geographic features could and did limit
PM, Scott McGrath scmcgr...@gmail.com wrote:
LORAN was/is not perfect geographic features could and did limit reception
However an effective jammer would need effective power in the hundred watt
range and a efficient antenna system plus a connection to power grid or
small Genset
Key is GPS is EASY to deny for wide areas for both Civillian and military users
Loran much less so and eLoran even less due to information carried by signal.
And the larger the area attacked the jammer becomes easier to find due to
signal strength
There is no doubt that both systems can be
We've been discussing both GNSS denial/spoofing vs Loran denial/spoofing and
the relative difficulty of doing same to determine which system is most
survivable
That being said the penalty for using the truck stop/spy shop GPS should be in
the hundreds of thousands per day and carry serious
I'm not for prohibiting ownership of as that would break a lot of companies
test programs including the one I work for as we have a spirent in a cage to
test LTE systems. And every avionics shop would be out of business
But if the FCC catches someone USING a jammer to access to GPS i dont have
Any competent engineer could have told the powers that be that a satellite
system based in LEO has a relatively high risk profile from the
Universe/hostile activity/spoofing and jamming
Yes GPS is/was oversold.
Trouble is Clarkes law applies here (any sufficiently advanced technology is
The atmosphere protects the earth from a lot of stuff the universe throws at us
Solar flares , space junk , micrometeors just the usual hazards the space at
large has. Inability to service satellites when transmitters or RCS fuel
exhausted
Sent from my iPhone
On Jul 30, 2013, at 9:31 AM,
him, It only has to cover a few feet.But
try and jam a jet flying at 40,000 feet or a navel carrier task force.
On Tue, Jul 30, 2013 at 5:50 AM, Scott McGrath scmcgr...@gmail.com wrote:
Any competent engineer could have told the powers that be that a satellite
system based in LEO has
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