From the earliest days of the GPS program, the US government intentionally degraded the civil signal to prevent full accuracy. This practice was referred to as Selective Availability (SA), and could be overcome by acquiring and processing the military signal. SA was officially discontinued on May 1, 2000 by presidential directive and is no longer a requirement for newly launched GPS satellites.
Anti-Spoofing (AS) is applied to the military signal to guard against fake transmissions of satellite data by encrypting the P-code to form the Y-code. Authorized Precise Positioning Service (PPS) receivers acquire and track the Y-code by using the GPS SAASM security architecture. Test and evaluation of PPS receiver functions requires SAASM-capable simulation equipment.*
Spirent systems provide products to mitigate the key validation and deployment issues for SA/A-S testing
- SA/A-S functions-all SAASM functions are fully supported*
- Simulator classification can be upgraded or downgraded with removable hard drives
- Spirent Federal’s SimSAAS software has been granted GPS Wing security approval*
- Flexible software allows full control over SA/A-S functions*
*Authorized users only
Spirent's Value for SAASM Testing
Spirent’s classified module enables lab-based SAASM functionality testing. Please get in touch with us for further information.
DLR Institute of Space Systems
The DLR institute required a GPS simulation platform that was flexible and easy to use. They needed to hit the ground running. Find out more
DLR Institute of Communications and Navigation
The DLR Institute of Communications and Navigation required a specialised solution that wasn’t available off the shelf. Find out more.
ipi-Institut
The IPI-institute had a very specific simulation requirement for end user testing within the automotive marketplace. Find out more.
LOCOSYS
LOCOSYS needed a flexible GPS platform for their own, and their customers testing requirements, they chose Spirent. Find out more.
Septentrio
When Septentrio were looking for a new way to characterise their new algorithms, they turned to Spirent. Find out more.
ST-Ericsson Case Study
ST Ericsson was looking to reduce time and travel costs incurred during extensive testing and development phases of their GPS and GNSS receiver chipsets. Find out more.
