Murray,
How useful it would be to have a DDS synthesized signal
generator with sub-milliHz steps, low phase noise,
controllable phase and output level, and 0 - 100MHz output capability!
I have just finished the work on a pcb that does exactly this and some more.
It features an AD9852 which
13.5 and 27 MHz are usually associated with digital video. SD video with 720 x
576 has a pixel clock of 13.5 MHz, and the corresponding SDI bit clock is 270
MHz.
Cheers
Stefan
-Ursprüngliche Nachricht-
Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag
von
SD-SDI 270MHz, then there is the HD-SDI.
Brooke, the 77.503KHz you mention for the DCF77: are you sure the IF is
3KHz? 77.503KHz is 77.5KHz + 3Hz...
On Thu, Dec 15, 2011 at 11:54 AM, Heinzmann, Stefan (ALC NetworX GmbH)
stefan.heinzm...@alcnetworx.de wrote:
13.5 and 27 MHz are usually
Capacitance is, of course, measured in 'jars' as per the 'Admiralty Handbook
of Wireless Telegraphy' (1930 -ish) :-)
I do use Farads (bits of them, anyway) guys, really.
Paul Reeves G8GJA
-Original Message-
From: Don Latham [mailto:d...@montana.com]
Sent: 14 December 2011 21:02
There were some advertised for the equivalent of £32 without the OCXO (and
free shipping). Seemed like a good deal so I bought two.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of gandal...@aol.com
Sent: 14 December 2011
19.44
This is a typical frequency used in IS-136 TDMA cellular handsets and possibly
base stations. The value is 400 times the raw bit rate of the channel (48.6
kHz).
Randy.
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John,
I believe the scaling factor was the key. Thanks.
I have v 1.58 of Stable32 and the scaling function now has its own button
and is not in the Open dialog. I'm sure I'm nowhere near out of the woods
yet, so I'm gonna keep your e-mail addy on speed dial ;-)
geo
On Wed, Dec 14, 2011 at
Wondering how people are getting labview. Is there a hobbyist version that
isnt super high priced or a place to get a cheapo license? How is it
done? I obviously just want to play with it and iuse it for non-commercial
reasons and cant justify the full price feel free to email me offline
if
Actually I would like to know also.
I actually had a license for an older version.
Unfortunately I had a disk issue that blew it away.
Further though I am very good about documenting licenses somehow in this
case I can't find it.
Perfect.
Regards
Paul.
On Thu, Dec 15, 2011 at 9:52 AM, Bill Dailey
I have not looked recently, but you can sometimes find older versions on eBay
when you buy a GPIB card.
My son's electronics circuit study book from last year came with a Labview CD
and student license. You can buy the book on Amazon for $$90 (as of last year).
If anyone is interested, I will
Diddier thats interesting. $90 is not bad I wonder what the limitations are.
Regards
Paul
WB8TSL
On Thu, Dec 15, 2011 at 10:26 AM, shali...@gmail.com wrote:
I have not looked recently, but you can sometimes find older versions on
eBay when you buy a GPIB card.
My son's electronics circuit
actually there are two options.
No book $59 with book $119
But unclear about how we might be considered a student.
Regards
Paul.
On Thu, Dec 15, 2011 at 10:30 AM, paul swed paulsw...@gmail.com wrote:
Diddier thats interesting. $90 is not bad I wonder what the limitations
are.
Regards
Paul
Oh this gets even more interesting. Here is the link and it seems you as a
single person could get Labview for either 20 or 59
http://e5.onthehub.com/WebStore/ProductSearchOfferingList.aspx?ws=49c547ba-f56d-dd11-bb6c-0030485a6b08vsro=8srch=labviewJSEnabled=1
I may try ordering and to see what
A Student of Time and it's measure?
Cheers, Graham
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of paul swed
Sent: December 15, 2011 10:36
To: shali...@gmail.com; Discussion of precise time and frequency measurement
Subject: Re:
I believe the Student version is fully functional, except any printouts
are marked STUDENT VERSION.
However, you do need a school connection to buy it.
-John
Diddier thats interesting. $90 is not bad I wonder what the limitations
are.
Regards
Paul
WB8TSL
On Thu, Dec
I would like to know the details.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of shali...@gmail.com
Sent: Thursday, December 15, 2011 9:27 AM
To: Time-Nuts
Subject: Re: [time-nuts] Labview and searching archive
I have not looked
I'm a student. We're always students.
Just not paying tuition.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Thursday, December 15, 2011 9:36 AM
To: shali...@gmail.com; Discussion of precise time and frequency
At Amazon:
http://www.amazon.com/LabVIEW-2009-Student-Robert-Bishop/dp/0132141299/
ISBN-10: 0132141299
ISBN-13: 978-0132141291
The Student Edition is also compatible with all National Instruments
data acquisition and instrument control hardware. Note: The LabVIEW
2009 Student
Paul,
If it was a version prior to 8.x, you don't need a serial number or any
kind of license key. With 8.x and later, your serial number is
validated through National Instruments' servers. If you registered your
software with NI, you should be able to get your serial number from them.
Well I did indeed try to see what would happen by ordering through the ehub
site.
Boy talk about 1989 connectivity. The sites so slow nothing ever happens
per page like 5 minutes.
I did see the amazon listing but thought that was just the book actually.
So not really sure what you are getting.
Brent
Thanks for the insights. I know I validated to the server and think I
registered it was about 2 years ago. Perhaps thats why I don't have my
normal keys documentation!
Need to go hunting.
But even if I can't recover it certainly the sub $100 pricing if it can be
obtained is attractive and
From the NI web site (http://www.ni.com/labviewse/select.htm)
LabVIEW Student Edition Textbook Bundle
The LabVIEW 2009 Student Edition Textbook Bundle includes the LabVIEW
Student Edition software and Dr. Robert H. Bishop's popular introductory
textbook Learning with LabVIEW, published by
Yes, you're right: we are always students and there's always something to
learn here from timenuts not only about precise timefrequency.
On Thu, Dec 15, 2011 at 5:24 PM, Brent Gordon time-n...@adobe-labs.comwrote:
From the NI web site
On 12/14/2011 3:59 PM, time-nuts-requ...@febo.com wrote:
It's not like metric is totally absent. We drink 2 liter cokes and defend
ourselves with 9mm pistols. Our cars use mostly metric parts. Even ham
radio operators, arguably the most jingoistic and set in the past bunch
around, get on
On Thu, Dec 15, 2011 at 9:29 AM, Dan Kemppainen d...@irtelemetrics.com wrote:
On 12/14/2011 3:59 PM, time-nuts-requ...@febo.com wrote:
It's not like metric is totally absent. We drink 2 liter cokes and defend
ourselves with 9mm pistols. Our cars use mostly metric parts. Even ham
radio
There is a student version that could save enough to pay the cost of the
class with. Older versions appear on the auction site. I have found the user
groups to be a great source of training and they are often located at an
collage you may use to qualify for the student status.
Stanley
-
16.384 MHz is of course 2^14 times 1 kHz. This was used
as a clock for direct digital synthesizers in signal generators.
Most DDS's can't generate exact frequencies starting from a 10 MHz
clock. There was an Agilent arbitrary waveform generator that used this
as a clock because circular memory
On Thu, Dec 15, 2011 at 9:42 AM, Chris Albertson
albertson.ch...@gmail.com wrote:
Can you point one even ONE machine shop in the US that can make metric
parts? Those guys would have gone out of business years ago. Also
how many are still using hand cranks and reading veneer scales? Even
What I find interesting is that the first push for standardization, at
least for machine threads, came from the manufacture of arms, the
Springfield Armory, at the time of the Civil war. At that time, threads
were a mixture of the then fledgling metric system (French) and a
conglomeration of
On 12/15/2011 04:13 AM, Brooke Clarke wrote:
Hi Pete:
Maybe you can shed some light on the common xtal frequencies table where
there's no explanation given?
http://www.prc68.com/I/pdf/Crystal_Freq.pdf
An answer is not it's an even frequency or it's an even binary
frequency. That's true for most
Also, periodically I would liek to search the archives but havent yet
figured out how to do it... can anyone help with that?
If you look at the hidden headers of any message from time-nuts, you will see
this line:
List-archive: http://www.febo.com/pipermail/time-nuts
The time-nuts archives
On Wed, Dec 14, 2011 at 10:52 PM, Hal Murray hmur...@megapathdsl.net wrote:
albertson.ch...@gmail.com said:
The prime factors are 13, 3, 2, 2, 2, and lots more 2s
There are also a couple of 5s in there.
[~]$ factor 63897600
63897600: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 5 13
Not fair. You
With mine due to arrive soon, I have some questions.
1. Will it work on 12 volts instead of 15?
2. Is the serial i/o really RS-232 or something else
3. Is there a command list?
4. Which pinout list is correct?
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of
On 12/15/2011 11:54 AM, Heinzmann, Stefan (ALC NetworX GmbH) wrote:
13.5 and 27 MHz are usually associated with digital video. SD video with 720 x
576 has a pixel clock of 13.5 MHz, and the corresponding SDI bit clock is 270
MHz.
18 MHz is another digital video frequency.
13,5 MHz is the
Brooke,
25 MHz (and to a lesser extent 50 MHz) is used to clock Ethernet PHYs.
It's multiplied up to the various clocks needed internally
(125,250,625 MHz etc.)
-Eric
On Wed, Dec 14, 2011 at 7:13 PM, Brooke Clarke bro...@pacific.net wrote:
Hi Pete:
Maybe you can shed some light on the common
and the one right at the bottom 1.4204058 GHz is the atomic hydrogen
rest frequency to those of us with a vague interest in Radio astronomy
:-))
Alan G3NYK
- Original Message -
From: Brooke Clarke bro...@pacific.net
To: Discussion of precise time and frequency measurement
On Thu, Dec 15, 2011 at 11:05 AM, Chuck Forsberg WA7KGX N2469R
c...@omen.com wrote:
1. Will it work on 12 volts instead of 15?
My bet is no as there is an internal regulator that likely needs headroom
2. Is the serial i/o really RS-232 or something else
There is a Max rs232 level converter
The laboratory where i work obviously reports results using the SI metric
system. There is one exception though, and that is the energy side,
specifically calorimetry. At first glance the calorimeters appear to
normal(SI, that is). They take mass in terms of the gram, measure
temperature by degree
On Thu, Dec 15, 2011 at 2:43 PM, Steve . iteratio...@gmail.com wrote:
The laboratory where i work obviously reports results using the SI metric
system. There is one exception though, and that is the energy side,
specifically calorimetry. At first glance the calorimeters appear to
normal(SI,
Those bolts would be whitworth.
On Dec 15, 2011, at 14:43, Steve . iteratio...@gmail.com wrote:
The laboratory where i work obviously reports results using the SI metric
system. There is one exception though, and that is the energy side,
specifically calorimetry. At first glance the
There's a system that the motorcycle guys call the Whitworth Inch, but I think
may be more correctly called Whitworth Measure. It's an old British system
that was used on their motorcycles and possibly cars, too. There's a whole
subculture of people trading in Whitworth tools for BSA and
In a message dated 15/12/2011 19:41:58 GMT Standard Time,
albertson.ch...@gmail.com writes:
On Thu, Dec 15, 2011 at 11:05 AM, Chuck Forsberg WA7KGX N2469R
c...@omen.com wrote:
1. Will it work on 12 volts instead of 15?
My bet is no as there is an internal regulator that likely needs
Hi Azelio:
Sorry, a mistake.
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html
Azelio Boriani wrote:
SD-SDI 270MHz, then there is the HD-SDI.
Brooke, the 77.503KHz you mention for the DCF77: are you sure the IF is
3KHz? 77.503KHz is 77.5KHz
The British Whitworth is a 55 degree thread instead of the 60 degree
SAE. BTU is a British Thermal Unit, hence BTU/lb. MKS is Meter Kilogram
Second, one of the precoursors to thee SI system.
Steve .
The laboratory where i work obviously reports results using the SI
metric
system. There is one
Hi Chris:
Yes. In hospitals they are measuring your height in feet and inches, but your weight is in kg (6' 1 120 kg). Sort of
like tire sizes which use inches for the wheel diameter and mm for the section width (P215/65R15 - 215mm section width,
15 rim diameter).
Even more interesting
[~]$ factor 63897600
63897600: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 5 5 13
Not fair. You added two zeros on the end and then got to add two more 2s
and 5s.
I converted 63.8976 MHz to Hz.
What is the target frequency? If you are building a radio or a signal
generator you will tune around
Iran hijacked US drone, claims Iranian engineer Tells Christian Science
Monitor that CIA's spy aircraft was 'spoofed' into landing in enemy
territory instead of its home base in Afghanistan
Iran guided the CIA's lost stealth drone to an intact landing inside
hostile territory by exploiting a
One of these days, when I run out of other things to play with, I want to
...
Well said Hal.
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and follow the instructions
The nearest data I can find is Vectron C4550 datasheet which is not
very helpful.
Does anyone have the spec. for the 63.8976 ocxo?
thanks
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Fascinating.
I can picture setting up a bunch of transmitters in the hills to send out
strong GPS-like signals to mimic the real thing. I suppose you could
control those signals to fool the device it is somewhere else. That bit is
very clever - you'd have to adjust the signals taking into account
John wrote:
Iran hijacked US drone, claims Iranian engineer Tells Christian Science
Monitor that CIA's spy aircraft was 'spoofed' into landing in enemy
territory instead of its home base in Afghanistan
Iran guided the CIA's lost stealth drone to an intact landing inside
hostile territory by
In the 1970's, and 80's, US universities educated great quantities of
Iranian students. Although there were some duds, most were very smart.
I've worked with several that could easily hack such a drone. Hell,
there were Iranian engineers that helped design the GPS satellites and
receivers.
I would say without question the answer is YES!
When the US DOD switched its backing to COTS electronics in all
of its defense hardware, it also went looking for the cheapest
way to get the most bang for the buck with defense hardware.
They certainly would be willing to save 100 lbs of inertial
This is about trying to get three ships with 1 microsecond synchronized
time at sea in the early 90's
http://blogs.computerworld.com/19423/does_anybody_really_know_what_time_it_is
Jim
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It depends on if they use the civilian or military GPS signal. Spoofing the
military signal should be tough.
Inertial guidances isn't all that heavy these days. Laser ring gyros for
instance or perhaps MEMs could be used.
___
time-nuts mailing
Le 15 déc. 2011 à 23:24, Azelio Boriani a écrit :
There are GPS simulators for lab use (never seen live or in a picture), I
suppose they have one connector to feed the GPS receiver antenna.
Generating in one equipment all the signals you don't need many but only
one precise timing source.
Yes, now wondering if there are L1/L2 simulators out there... better
googling around.
On Thu, Dec 15, 2011 at 11:35 PM, li...@lazygranch.com wrote:
It depends on if they use the civilian or military GPS signal. Spoofing
the military signal should be tough.
Inertial guidances isn't all that
On 12/15/2011 11:06 PM, Jim Palfreyman wrote:
Fascinating.
I can picture setting up a bunch of transmitters in the hills to send out
strong GPS-like signals to mimic the real thing. I suppose you could
control those signals to fool the device it is somewhere else. That bit is
very clever -
Note that the undercarriage is always hidden when it's shown.
I suspect they simply jammed the GPS and command links, and it defaulted to an
automatic soft landing on not so soft terrain.
Rather less impressive, but still annoying.
___
time-nuts
Just watch how GPS stuff will get all restricted now.
On 12/15/2011 5:40 PM, mike cook wrote:
Le 15 déc. 2011 à 23:24, Azelio Boriani a écrit :
There are GPS simulators for lab use (never seen live or in a picture), I
suppose they have one connector to feed the GPS receiver antenna.
I agree. This is my opinion too.
On Thu, Dec 15, 2011 at 11:50 PM, David VanHorn
d.vanh...@elec-solutions.com wrote:
Note that the undercarriage is always hidden when it's shown.
I suspect they simply jammed the GPS and command links, and it defaulted
to an automatic soft landing on not so
Hi,
From: Azelio Boriani azelio.bori...@screen.it
Yes, now wondering if there are L1/L2 simulators out there... better
googling around.
http://wireless.vt.edu/symposium/2011/posters/GPS%20Signal%20Simulation_Brown.pdf
Bye,
Jean-Louis
___
Le 15 déc. 2011 à 23:57, Peter Gottlieb a écrit :
Just watch how GPS stuff will get all restricted now.
Too late, Simulators are on paybay now. Just need deep pockets.
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Thank you for the link.
On Thu, Dec 15, 2011 at 11:58 PM, Jean-Louis Noel j...@stben.net wrote:
Hi,
From: Azelio Boriani azelio.bori...@screen.it
Yes, now wondering if there are L1/L2 simulators out there... better
googling around.
The Spirent STR4500 seems very up-to-date, very expensive, L1 C/A only.
On Fri, Dec 16, 2011 at 12:02 AM, Azelio Boriani
azelio.bori...@screen.itwrote:
Thank you for the link.
On Thu, Dec 15, 2011 at 11:58 PM, Jean-Louis Noel j...@stben.net wrote:
Hi,
From: Azelio Boriani
I'm not so sure. What if you has one site, antenna, and transmitter and a
dozen signal sources with programmable synthesizers and coders.
The drone antenna is likely omni. The Russians or Chinese could easily
supply that.
-John
Fascinating.
I can picture setting up a bunch
I bet this drone contains no technology that is not exportable. Of
course they had to think about a crash.
I also bet it had an inertial nav system as backup to the GPS. But
and this is the key to all backups. You have to know the primary is
failed. When you jam GPS the smart way is not to
OK, now I know what a GPS simulator is like. BTW the Spirent is cheaper at
used-line.com than on paybay. Anyway my opinion doesn't change: as pointed
out by David VanHorn they have jammed the GPS and the data link. I think
the data link must be a sophisticated frequency hopping type radio link so,
I wonder how long it will be before we see Brinks vans, Ferrari's and other
more mundane GPS dependent things being hijacked. Possibilities seem limitless.
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You could just have a GPS receiver and use that to sync up the jammer.
-John
==
To transmit a GPS cluster signal you need a GPS simulator to generate
the cluster so even a single transmitter can do this, the relative
timing and not the different positions of the transmitters
Of course, but then when you switch on your transmitter you are on your
own. Considering the speed of a drone (700Km/h?) you need a great coverage,
so much RF power out.
On Fri, Dec 16, 2011 at 12:22 AM, J. Forster j...@quikus.com wrote:
You could just have a GPS receiver and use that to sync
Now I've heard Lightsquared was installing a network in Iran! Just kidding, but
what would happen?
I would think that just jamming the L1-L2 frequencies would be enough to cause
the drone to fly in circles or a straight line until it ran out of fuel and
flopped to the ground, perhaps
Arriving this week, IEEE Magazine this months issue has an article about
pilot-less commercial airliners, comparing the UAV drone technology as
being readily available to fly paying passengers from here to there.
Coincidentally the table of contents page depicts a drone which appears
to be
I've talked to the GPS jammers at Nellis and have seen their gear. They
don't spoof but just jam. The gear is totally COTS. Some Marconi signal
generator that can generate white noise at the two GPS frequencies. They
have omni or directional antennas. They have an old Russian jammer on
hand,
On Thu, Dec 15, 2011 at 3:31 PM, Azelio Boriani
azelio.bori...@screen.it wrote:
Considering the speed of a drone (700Km/h?) you need a great coverage,
so much RF power out.
No. The transmitter could be in an aircraft that follows the drone,
maybe only 100 feet away.
Chris Albertson
This mindset is an example why the US is falling so far behind the rest of the
world, not only in technology but in the diplomacy game. In 1980 I worked for a
very smart engineering manager who told me he studied electrical engineering by
the light of a gasoline lantern in a tent in Turkey.
You guys are just over-thinking this issue. Iran was merely testing out a new
Lightsquared base station.
Jerry
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and
Hi,
Of course, but then when you switch on your transmitter you are on your
own. Considering the speed of a drone (700Km/h?) you need a great
coverage, so much RF power out.
Easy: Use a dish antenna on the transmitter.
Very directional with large ampification.
If using a 'moderate' opening
Yes, agree. An OCXO is enough (but my opinion is the same: only jammed not
steered).
On Fri, Dec 16, 2011 at 12:52 AM, Pieter ten Pierick
time-nuts-m...@tenpierick.com wrote:
Hi,
Of course, but then when you switch on your transmitter you are on your
own. Considering the speed of a drone
Jim,
Are you sure that wasn't the April edition of that mag?
Nic
Arriving this week, IEEE Magazine this months issue has an article about
pilot-less commercial airliners, comparing the UAV drone technology as being
readily available to fly paying passengers from here to there.
KISS guys.
Suppose the Iranians had one of their buddies watching the drone base.
When they saw a drone take off, the guy just called a contact by cell and
the Iranians turned on a wide coverage jammer somewhere along the flight
path.
From previous incidents and observations, if the drone came
Chris Albertson wrote:
On Thu, Dec 15, 2011 at 11:05 AM, Chuck Forsberg WA7KGX N2469R
c...@omen.com wrote:
1. Will it work on 12 volts instead of 15?
My bet is no as there is an internal regulator that likely needs headroom
2. Is the serial i/o really RS-232 or something else
There is a
I agree entirely.
Chris Stake
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of David VanHorn
Sent: 15 December 2011 22:50
To: Discussion of precise time and frequency measurement;
li...@lazygranch.com
Subject: Re: [time-nuts] The
Kandahar has proven poor opsec since the thing was photographed! I don't
know about the base in Baluchistan.
But even knowing the launch doesn't mean they know when it is on target.
Supposedly the UAS is stealthy, so it would be hard to detect.
On 12/15/2011 4:00 PM, J. Forster wrote:
KISS
All I can say is that the sheet metal on that drone looks really good.
I doubt it ran out of fuel.
They either landed it which would require very high level spoofing
ability or like I said use something like a butterfly net on it. The
metal is just to straight for a crash.
On Thu, Dec 15,
It is composite, not metal.
If you know what you are doing, composites are extremely tough. I don't
know if graphite is kosher on a stealth plane. I have to assume it is
S-2 glass or similar nonconductive composites. But if graphite were
allowed, you would be amazed at how much abuse it could
Hi
Hard to detect looking horizontally, pretty easy looking straight up (or
straight down from above it).
Bob
On Dec 15, 2011, at 7:14 PM, gary wrote:
Kandahar has proven poor opsec since the thing was photographed! I don't know
about the base in Baluchistan.
But even knowing the
Has anybody seen the underside? It could have pancaked or crashed on sand
or something. I've no idea of the terrain at the crash site.
-John
===
All I can say is that the sheet metal on that drone looks really good.
I doubt it ran out of fuel.
They either landed it which would
Maybe you can hear them taking off?
-John
=
Hi
Hard to detect looking horizontally, pretty easy looking straight up (or
straight down from above it).
Bob
On Dec 15, 2011, at 7:14 PM, gary wrote:
Kandahar has proven poor opsec since the thing was photographed! I don't
Hi
Radar bounces off the flat sides very nicely ….
Bob
On Dec 15, 2011, at 7:41 PM, J. Forster wrote:
Maybe you can hear them taking off?
-John
=
Hi
Hard to detect looking horizontally, pretty easy looking straight up (or
straight down from above it).
Bob
The problem I have seen with the light weight electronic inertial
guidance sensors is they drift off course very quickly. You would need
to be able to correct them several times per minute... Good enough to
keep a plane flying straight and level, and in the general direction of
target, but not
On 12/15/11 3:41 PM, Joe Leikhim wrote:
Arriving this week, IEEE Magazine this months issue has an article about
pilot-less commercial airliners, comparing the UAV drone technology as
being readily available to fly paying passengers from here to there.
Coincidentally the table of contents page
On 12/15/11 2:06 PM, Jim Palfreyman wrote:
Fascinating.
I can picture setting up a bunch of transmitters in the hills to send out
strong GPS-like signals to mimic the real thing. I suppose you could
control those signals to fool the device it is somewhere else. That bit is
very clever - you'd
On 12/15/11 2:17 PM, Charles P. Steinmetz wrote:
John wrote:
Iran hijacked US drone, claims Iranian engineer Tells Christian Science
Monitor that CIA's spy aircraft was 'spoofed' into landing in enemy
territory instead of its home base in Afghanistan
Iran guided the CIA's lost stealth drone to
On Thu, Dec 15, 2011 at 5:57 PM, Peter Gottlieb n...@verizon.net wrote:
Just watch how GPS stuff will get all restricted now.
I'm curious if the lightsquared folks will try to use this as leverage to
debunk the importance of GPS.
___
time-nuts
Having a +20m wingspan, getting very decent inertial sensors is no
problem. ca 6kg on a 5000kg(?) vehicle is no problem.
http://www.es.northropgrumman.com/solutions/ln251-digital-ins-gps/assets/ln251.pdf
--
Björn
The problem I have seen with the light weight electronic inertial
On 12/15/11 2:24 PM, Azelio Boriani wrote:
There are GPS simulators for lab use (never seen live or in a picture), I
suppose they have one connector to feed the GPS receiver antenna.
Generating in one equipment all the signals you don't need many but only
one precise timing source.
Not quite
On 12/15/11 2:26 PM, Chuck Harris wrote:
I would say without question the answer is YES!
When the US DOD switched its backing to COTS electronics in all
of its defense hardware, it also went looking for the cheapest
way to get the most bang for the buck with defense hardware.
They certainly
On 12/15/11 4:30 PM, Bob Camp wrote:
Hi
Hard to detect looking horizontally, pretty easy looking straight up (or
straight down from above it).
Hard to detect against ground clutter looking down (assuming the Iranis
have suitable radars that can do this). Maybe thermal signature from
On 12/15/11 4:53 PM, Bob Camp wrote:
Hi
Radar bounces off the flat sides very nicely ….
You are right, it does, but it doesn't bounce BACK towards the observer,
which is what you care about. Consider a flat plate at a 45 degree
angle from you. All the radar energy bounces to the side.
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