GPS Doesn't Fail

[denverpilot]

I can't find the thread with the "GPS Doesn't Fail" garbage this morning, but just thought I'd pass this along for posterity...

Note the length of time and the area affected.

https://www.faasafety.gov/files/notices/2014/Sep/WSMR_14-09_GPS_Flight_Advisory.pdf

We get one of these notices monthly around here, at least.

YMMV.

 

[Jim Logajan]

I can't find the thread with the "GPS Doesn't Fail" garbage this morning, but just thought I'd pass this along for posterity...

Note the length of time and the area affected.

https://www.faasafety.gov/files/notices/2014/Sep/WSMR_14-09_GPS_Flight_Advisory.pdf

We get one of these notices monthly around here, at least.

YMMV.

I plugged the coordinates into Google Maps (assuming format is ddd.hh.mm.ss) and found Holloman AFB very close to the center. Turns our they are a dedicated GPS messer-upper:

http://www.holloman.af.mil/library/factsheets/factsheet_print.asp?fsID=5922&page=1

The 746th Test Squadron (TS), also known as the Central Inertial and GPS Test Facility (CIGTF), is the DoD's designated lead test organization chartered to test and evaluate Global Positioning System (GPS) user equipment (UE) and integrated GPS based guidance and navigation systems. To this end, the 746 TS manages the tri-service GPS Test Center of Expertise (COE) comprised of Army, Navy, and Air Force test agencies chartered to support GPS test and evaluation initiatives. With over 40 years of experience, CIGTF has established itself as a leader in Inertial, GPS, and blended GPS/Inertial component and system testing. In addition, CIGTF's inclusive ground, field, and flight-testing capabilities offer the customer a cost-effective means to evaluate their guidance and navigation systems.

Handy Customer Handbook of their services:
http://www.dtic.mil/dtic/tr/fulltext/u2/a471913.pdf

 

[Jim Logajan]

So they issue these notams even when testing in the "faraday cage" of a building?

Faraday cage? May not be one. There is this claim on the Holloman AFB page (I've underlined the part that seems to imply no cages may be used in some of their tests):

Antenna Test Range

• Conducts multi-element GPS antenna testing using multiple jammers in a controlled, open-air environment
• Covers the middle ground between laboratory and flight test capabilities and offers an additional environment to satisfy customer test requirements