[aprssig] GPS possible disruption SE US Jan 20 - Feb 22

Glenn Little WB4UIV glennmaillist at bellsouth.net
Fri Jan 21 00:01:15 EST 2011

Long range nukes have no need for GPS.
We could fire a MIRV (Multiple Independent Reentry Vehicle) ballistic 
missile from a submarine and hit hardened targets with all warheads.
The missiles almost 20 years ago used celestial navigation for 
inflight corrections.
I do not know what is used today, but, if they relied on an active 
emitter (GPS) for inflight corrections, somebody goofed.

GPS would be used for launching a short range device from a moving 
launcher where position was either not accurately known or moving very fast.

This is just my guess as to how to direct a weapon.


At 12:58 PM 1/20/2011, you wrote:
>What is the modulation of the GPS signal?  Is it something that a 
>larger power transmitter could blanket an area and override the sats 
>as in the FM capture effect?  I'd guess that "moving things around" 
>could be a good reason for this test.  It implies that once a target 
>is "guessed", that a high speed interceptor could arrive overhead 
>and direct GPS guided weapons away to somewhere else.
>I'd guess that smart weapons would be designed to "integrate over 
>time" correction of their trajectory and might not be vastly 
>redirect-able at the last minute.  But dealing with wind changes and 
>other things might make them much more nimble and this could allow 
>them to be "flown over" for a long amount of time and directed to 
>someplace else, completely.
>The recent noise about North Korea being ready to deliver long range 
>nukes might be a stimulus for this kind of activity.
>Gregg Wonderly
>On 1/20/2011 11:20 AM, mwbesemer at cox.net wrote:
>>That is possible, and could probably be implemented via the WAAS system, in
>>areas that are augmented by WAAS.
>>However, keep in mind that either jamming or offsetting GPS for aviation or
>>maritime customers would be relatively ineffective due to the fact that those
>>platforms are required to have redundancy in their navigation systems via
>>another source. (GPS backed by INS, DNS, Omega, LORAN, etc.) Also, 
>>when near or
>>over land, VORTACs are available for aircraft use (although they 
>>could be shut
>>off in case of emergency).
>>Consider, however, the case of smart-munitions. Those that are 
>>GPS-guided (are
>>likely to) go into a fail-safe mode if GPS guidance was completly disrupted
>>(jammed). This mode might result in the self-destruction of the 
>>weapon or in the
>>safeing of the weapon (rendering it non-explosive, although you 
>>still would not
>>want it landing on your house).
>>I'm only speculating on all of this (of course) but I did spend the 
>>majority of
>>the past 30 years doing RT&E/DT&E with the military. Most likely, we will NOT
>>hear anything specific regarding the results/purpose of this test (unless
>>Wikileaks gets a hold of it!) for the next 25 years or so. There 
>>are some things
>>that the public really doesn't need (or want) to know about.
>>On Thu, Jan 20, 2011 at 12:03 PM, Lynn W. Deffenbaugh (Mr) wrote:
>>>But with a jammer, the receiver knows they don't have a fix and something's
>>>up. I'm more thinking an experimental scrambler/offsetter that allows GPS
>>>receivers within the cone of influence to arrive at a solution based on the
>>>received signals and generate fix, but they really aren't at the 
>>>location the
>>>fix describes. And the GPS consumer won't know that they're being mis-lead
>>>Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
>>>mwbesemer at cox.net wrote:
>>>>Nope... you're thinking about it from the wrong angle.
>>>>Ever heard of a GPS Jammer?
>>>>On Thu, Jan 20, 2011 at 11:36 AM, Gregg Wonderly wrote:
>>>>>It sounds like a transmitter at 40,000ft that might be a "relay" 
>>>>>of existing
>>>>>GPS data. Perhaps they are trying to figure out how to make GPS 
>>>>>work on the
>>>>>ground in cities with tall buildings?
>>>>>On 1/20/2011 9:15 AM, Earl Needham wrote:
>>>>>>I'm just wondering what they're doing that might disrupt GPS...
>>>>>>Vy 7 3
>>>>>>KD5XB -- Earl Needham http://groups.yahoo.com/group/cw_bugs Quoting from
>>>>>>the Coast Guard: ZUT Posted via Blackberry
>>>>>>-----Original Message-----
>>>>>>From: Steve Noskowicz<noskosteve at yahoo.com>
>>>>>>Sender: aprssig-bounces at tapr.org
>>>>>>Date: Thu, 20 Jan 2011 07:12:37
>>>>>>To: TAPR APRS Mailing List<aprssig at tapr.org>
>>>>>>Reply-To: TAPR APRS Mailing List<aprssig at tapr.org>
>>>>>>Subject: Re: [aprssig] GPS possible disruption SE US Jan 20 - Feb 22
>>>>>>--- On Lynn W. Deffenbaugh (Mr) wrote:
>>>>>>>... I was looking for the coordinates that I could understand ...
>>>>>>>Lynn (D) - KJ4ERJ -
>>>>>>- - - - - -
>>>>>>I often say that... "Can you explain that in terms I know?" (;-)
>>>>>>304906N = 30.4906 Deg North
>>>>>>0802811W = 80.2811 Deg West
>>>>>>Google maps finds it A-OK.
>>>>>>If you'd like it, I have an Excel spreadsheet that does 
>>>>>>conversions between
>>>>>>all forms of these. That is:
>>>>>>1 - Degrees.decimal (As shown above)
>>>>>>2 - Degrees, Minutes.decimal
>>>>>>3 - Degrees, Minutes, Seconds.decimal
>>>>>>Contact via my web site or MYCALL at arrl.net
>>>>>aprssig mailing list
>>>>>aprssig at tapr.org
>>>>aprssig mailing list
>>>>aprssig at tapr.org
>>>aprssig mailing list
>>>aprssig at tapr.org
>>aprssig mailing list
>>aprssig at tapr.org
>aprssig mailing list
>aprssig at tapr.org

More information about the aprssig mailing list