JDAM SAASM Upgrade - Upgrade to a Proven Weapon

M. Whiting, J. Nielson

Abstract:	Recently Boeing and Rockwell Collins began an effort to introduce a Selective Availability Anti-Spoofing Module (SAASM) based GPS receiver into JDAM. SAASM is a module that implements the security concept now required by the Joint Staff. The receiver chosen retains the form factor of the legacy receiver, but it is based on an upgraded version of the Rockwell Collins NavStrike receiver. At the same time SAASM is being introduced, other improvements to the weapon are being made. For example the SAASM will include a large array of thousands of correlators that will enable the receiver to quickly perform DY- code acquisitions with up to 10 ms of time error. Additionally, the Dual-port RAM presently being used as the interface to the GPS receiver is being replaced by a less expensive high speed serial interface. A number of other improvements are being made which will be discussed in more detail in the paper. This paper is significant as well as interesting because it reports on improvements to a well known weapon system. Furthermore, some of the lessons learned from this effort may help other weapon systems that are preparing to upgrade to SAASM.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	1085 - 1089
Cite this article:	Whiting, M., Nielson, J., "JDAM SAASM Upgrade - Upgrade to a Proven Weapon," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 1085-1089.
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