Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Saasm shopping experience:

1. Compare - without doubt the biggest advantage that the Saasm offers shoppers today is the ability to compare thousands of Saasm at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Saasm? Wrong! If the Saasm is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Saasm then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Saasm? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Saasm and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Saasm wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Saasm then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Saasm site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Saasm, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Saasm, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

An SAASM, for Selective Availability / Anti-Spoofing Module, is used by military Global Positioning System receivers to allow decryption of precision GPS coordinates, while the accuracy of civilian GPS receivers may be reduced by the US military through Selective Availability.

SAASM allows satellite authentication, over-the-air rekeying, and contingency recovery. Those features are not available with the similar, but older PPS-SM system. PPS-SM systems require periodic updates with a classified "Red Key" that may only be transmitted by secure means (such as physically taking the receiver to a secure facility for rekeying or having a trusted courier deliver a paper tape with a new key to the receiver, after which that paper tape must be destroyed). SAASM systems can be updated with an encrypted "Black Key" that may be transmitted over unclassified channels. All military receivers that will be newly-deployed after the end of September 2006 must use SAASM.

SAASM-enabled receivers can also acquire the encrypted Y-code directly from satellite, without relying on local radio signals. This provides a substantially-increased resistance to GPS jamming, perhaps 10 to 20 db better than the PPS-SM system.

SAASM hardware modules are covered with a sophisticated anti-tampering coating, to deter analysis of their internal operation.

The next generation military signal for GPS, called M-code, will be launched on satellites beginning in 2005. A complete constellation of 18 satellites with M-code capability is planned for 2016.

References GPSworld.com article "Saving SAASM" by Robert Huffman (Webpage, January 2006)

An SAASM, for Selective Availability / Anti-Spoofing Module, is used by military Global Positioning System receivers to allow decryption of precision GPS coordinates, while the accuracy of civilian GPS receivers may be reduced by the US military through Selective Availability.

SAASM allows satellite authentication, over-the-air rekeying, and contingency recovery. Those features are not available with the similar, but older PPS-SM system. PPS-SM systems require periodic updates with a classified "Red Key" that may only be transmitted by secure means (such as physically taking the receiver to a secure facility for rekeying or having a trusted courier deliver a paper tape with a new key to the receiver, after which that paper tape must be destroyed). SAASM systems can be updated with an encrypted "Black Key" that may be transmitted over unclassified channels. All military receivers that will be newly-deployed after the end of September 2006 must use SAASM.

SAASM-enabled receivers can also acquire the encrypted Y-code directly from satellite, without relying on local radio signals. This provides a substantially-increased resistance to GPS jamming, perhaps 10 to 20 db better than the PPS-SM system.

SAASM hardware modules are covered with a sophisticated anti-tampering coating, to deter analysis of their internal operation.

The next generation military signal for GPS, called M-code, will be launched on satellites beginning in 2005. A complete constellation of 18 satellites with M-code capability is planned for 2016.

References GPSworld.com article "Saving SAASM" by Robert Huffman (Webpage, January 2006)