[ntp:questions] ANN: UK GPS Jamming update
I have received the following notice ___ NOTIFICATION OF GPS JAMMING EXERCISES SCOTLAND, NORTH AND WEST COASTS, 16-26th APRIL 2012 Dates: Between 16 to 26 April 2012 inclusive. Times: Intermittent for 1hr slots between 0800BST and 2130BST. Location of MULTIPLE jammers: A.The Little Minch and North Minch northwards from Waternish Point 57-36N 006-38W to Stoer Head 58-14N 005-24W, including Sound of Raasay and Inner Sound. B.Within 35 miles of Faraid Head 58-36N 004-46W. Frequency: A 24 MHz band centred around 1176.45 MHz (GPS L5), 1227.60MHz (GPS L2) and 1575.42MHz (GPS L1). Contact Details: In an emergency any vessel may request an abatement of jamming via VHF through Emergency cease jam via the CG, the Jamming Station (call sign: Loch Ewe / Cape Wrath GPS Jamming), or by telephone to Joint Warrior Duty Controller 01436 674321 ext. 4372. It is stressed that, as in previous exercises, Safety of Life operations will at all times take precedence over exercise activities. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
Just wondering: 1) Is the UK govt doing this? 2) Is the USA doing anything similar? 3) What's the purpose? 4) Have you guys using GPS over there been affected? Sincerely, Ron On 3/28/2012 9:24 AM, David J Taylor wrote: I have received the following notice ___ NOTIFICATION OF GPS JAMMING EXERCISES SCOTLAND, NORTH AND WEST COASTS, 16-26th APRIL 2012 Dates: Between 16 to 26 April 2012 inclusive. Times: Intermittent for 1hr slots between 0800BST and 2130BST. Location of MULTIPLE jammers: A.The Little Minch and North Minch northwards from Waternish Point 57-36N 006-38W to Stoer Head 58-14N 005-24W, including Sound of Raasay and Inner Sound. B.Within 35 miles of Faraid Head 58-36N 004-46W. Frequency: A 24 MHz band centred around 1176.45 MHz (GPS L5), 1227.60MHz (GPS L2) and 1575.42MHz (GPS L1). Contact Details: In an emergency any vessel may request an abatement of jamming via VHF through Emergency cease jam via the CG, the Jamming Station (call sign: Loch Ewe / Cape Wrath GPS Jamming), or by telephone to Joint Warrior Duty Controller 01436 674321 ext. 4372. It is stressed that, as in previous exercises, Safety of Life operations will at all times take precedence over exercise activities. -- (PS - If you email me and don't get a quick response, don't be concerned. I get about 300 emails per day from alternate energy mailing lists and such. I don't always see new messages very quickly. If you need a reply and have not heard from me in 1 - 2 weeks, send your message again.) Ron Frazier timekeepingdude AT c3energy.com ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
Just wondering: 1) Is the UK govt doing this? The notice is from a UK Government agency. 2) Is the USA doing anything similar? I would be surprised if they were not, but they may have more remote areas to carry out such tests. 3) What's the purpose? I understand that it's for the military to see how they would work without GPS or on the event of GPS jamming. 4) Have you guys using GPS over there been affected? Sincerely, Ron Yes, see: http://www.bbc.co.uk/news/uk-scotland-highlands-islands-15242835 Cheers, David ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
Ron Frazier (NTP) wrote: Just wondering: 1) Is the UK govt doing this? Yes 2) Is the USA doing anything similar? ? 3) What's the purpose? ? 4) Have you guys using GPS over there been affected? So far as I know my GPS reception hasn't been affected by the jamming. The locations for the jamming excercises seem to be in remote areas. Both GPS and MSF reception was out during November 2010, and from January through March 2011 due to weather conditions. The reasons are similar despite the differences in frequencies. David Sincerely, Ron On 3/28/2012 9:24 AM, David J Taylor wrote: I have received the following notice ___ NOTIFICATION OF GPS JAMMING EXERCISES SCOTLAND, NORTH AND WEST COASTS, 16-26th APRIL 2012 Dates: Between 16 to 26 April 2012 inclusive. Times: Intermittent for 1hr slots between 0800BST and 2130BST. Location of MULTIPLE jammers: A.The Little Minch and North Minch northwards from Waternish Point 57-36N 006-38W to Stoer Head 58-14N 005-24W, including Sound of Raasay and Inner Sound. B.Within 35 miles of Faraid Head 58-36N 004-46W. Frequency: A 24 MHz band centred around 1176.45 MHz (GPS L5), 1227.60MHz (GPS L2) and 1575.42MHz (GPS L1). Contact Details: In an emergency any vessel may request an abatement of jamming via VHF through Emergency cease jam via the CG, the Jamming Station (call sign: Loch Ewe / Cape Wrath GPS Jamming), or by telephone to Joint Warrior Duty Controller 01436 674321 ext. 4372. It is stressed that, as in previous exercises, Safety of Life operations will at all times take precedence over exercise activities. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
On 3/28/2012 11:26 AM, David J Taylor wrote: Just wondering: 1) Is the UK govt doing this? The notice is from a UK Government agency. 2) Is the USA doing anything similar? I would be surprised if they were not, but they may have more remote areas to carry out such tests. 3) What's the purpose? I understand that it's for the military to see how they would work without GPS or on the event of GPS jamming. 4) Have you guys using GPS over there been affected? Sincerely, Ron Yes, see: http://www.bbc.co.uk/news/uk-scotland-highlands-islands-15242835 Cheers, David Wow. Those sound like some substantial negative effects. I guess it's a good idea to have backups for our GPS's, if possible. Ron -- (PS - If you email me and don't get a quick response, don't be concerned. I get about 300 emails per day from alternate energy mailing lists and such. I don't always see new messages very quickly. If you need a reply and have not heard from me in 1 - 2 weeks, send your message again.) Ron Frazier timekeepingdude AT c3energy.com ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
On 28 Mar, 2012, at 08:26 , David J Taylor wrote: Just wondering: 1) Is the UK govt doing this? The notice is from a UK Government agency. 2) Is the USA doing anything similar? I would be surprised if they were not, but they may have more remote areas to carry out such tests. White Sands Missile Range, maybe. You can't fly over it, and a friend who lives in New Mexico and owns a plane tells me there is a standing warning for pilots flying around it to avoid relying on GPS for navigation. He has also heard of pilots doing that who have seen their position, as reported by GPS, suddenly shift by 50 miles. 3) What's the purpose? I understand that it's for the military to see how they would work without GPS or on the event of GPS jamming. That sounds so unlikely. If they wanted to see what it was like without GPS they could just turn their GPS receivers off. More than this, a lot of your reports have them jamming the GPS L1 frequency alone and I don't think that would deny positioning to modern dual-frequency military GPS receivers. My guess would be that what they are practicing isn't jamming, which seems like it would require little practice, but rather is the much more high tech GPS spoofing, with the jamming being done to cover that up. Dennis Ferguson ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
Dennis Ferguson dennis.c.fergu...@gmail.com wrote: On 28 Mar, 2012, at 08:26 , David J Taylor wrote: Just wondering: 1) Is the UK govt doing this? The notice is from a UK Government agency. 2) Is the USA doing anything similar? I would be surprised if they were not, but they may have more remote areas to carry out such tests. White Sands Missile Range, maybe. You can't fly over it, and a friend who lives in New Mexico and owns a plane tells me there is a standing warning for pilots flying around it to avoid relying on GPS for navigation. He has also heard of pilots doing that who have seen their position, as reported by GPS, suddenly shift by 50 miles. Quite frequently in the High desert in SOCAL in the Ft Irwine/Edwards AFB area; the FAA puts out notices when it is to happen. ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
Re: [ntp:questions] ANN: UK GPS Jamming update
Ron Frazier (NTP) wrote:
1) Is the UK govt doing this?
Perhaps, likely a NATO exercise.
2) Is the USA doing anything similar?
Notices / Advisories are issued all the time.
{Something like 43 exercises are scheduled in / near the US in the next 3
months.}
http://www.navcen.uscg.gov/pdf/gps/gpsnotices/GPS_Interference.pdf
e.g.
NANU e.g.:
... ON APPROXIMATELY 14 MAR 2012 ... SVN32/PRN24 WILL BE UNUSABLE UNTIL FURTHER
NOTICE.
... GPS SATELLITE SVN27 (PRN27) UNUSABLE ON JDAY 086 (26 MAR 2012) BEGINNING
1418 ZULU UNTIL JDAY 086 (26 MAR 2012) ENDING 1556 ZULU.
NOTAM e.g.:
!GPS 09/062 (KNMH A0067/11) GPS NAV PRN 24 OTS
!GPS 03/063 ZAB NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE WITHIN A RADIUS OF
348 NM
AND CENTERED AT 371324N/1163145W OR THE LOCATION ALSO KNOWN AS THE /BTY/ VOR
RADIAL 022.3
AT 27.4NM AT FL400 AND ABOVE;
DECREASING IN AREA WITH A DECREASE IN ALTITUDE TO A RADIUS OF 296 NM AT FL250;
A RADIUS OF 224 NM AT 10,000FT MSL;
A RADIUS OF 200 NM AT 4,000FT AGL AND A RADIUS OF 167 NM AT 50FT AGL.
0600-1500 DLY WEF 1203290600-1203301500
ATC Notice / Flight Advisory e.g.:
Centered at 402602N/1132936W or the BVL VOR 145.44 degree radial at 21.3NM.
28 APR – 29 APR 1700Z – 2000Z 2200Z – Z, 30 APR - 06 MAY 1700Z – 2000Z,
09 MAY – 13 MAY 1700Z – 2000Z; the GPS signal may be unreliable or unavailable
within a 395NMR centered at 402602N/1132936W or the BVL VOR 145.44 degree
radial
at 21.3NM at FL400 and above, decreasing in area with decrease in altitude to
355NMR at FL250,
260NMR at 10,000 FT MSL, 265NMR at 4,000 FT AGL and 225NMR at 50 FT AGL.
3) What's the purpose?
Usually Military Operations Jamming / Spoofing Resistance Testing of Navigation
and Weapons Systems.
e.g. Here is one at a Naval Air Weapons Center
www.faasafety.gov/files/notices/2011/Sep/CHLK_11-11_Flight_Advisory.pdf
--
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