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Low Cost, Low Power, SAASM GPS Receiver with Up Finding Capability for Gun Launched Projectiles
Navy SBIR 2008.3 - Topic N08-217 NAVSEA - Mr. Dean Putnam - [email protected] Opens: August 25, 2008 - Closes: September 24, 2008 N08-217 TITLE: Low Cost, Low Power, SAASM GPS Receiver with Up Finding Capability for Gun Launched Projectiles TECHNOLOGY AREAS: Air Platform, Ground/Sea Vehicles, Electronics, Weapons ACQUISITION PROGRAM: PEO-IWS, Naval Surface Fire Support Program (IWS 3C). The technology within this topic is restricted under the International Traffic in Arms Regulation (ITAR), which controls the export and import of defense-related material and services. Offerors must disclose any proposed use of foreign nationals, their country of origin, and what tasks each would accomplish in the statement of work in accordance with section 3.5.b.(7) of the solicitation. OBJECTIVE: Develop an integrated SAASM GPS receiver with up-finding and up-link capability as required for future advanced guided projectiles and many other DOD systems. A very small form factor is required as well an unprecedented decrease in the power and cost to implement these functions. These combined technologies will be applicable to wide range of applications across the tri-services from hypersonic gun-launched projectiles to spin-stabilized existing munitions as well as UAV�s and handheld radios. The topic goals are a power consumption of less than 1 watt at a production cost of less than $1,000 (quantities of 10,000) with a shock hardness of up to 45,000 G�s of launch acceleration. DESCRIPTION: The high cost of SAASM GPS receivers for Navy/Army gun launched projectiles, munitions, and other small form-factor applications, such as marines, dismounted soldiers and micro UAVs has discouraged its adoption on many of these DOD platforms. Furthermore, the size and power of many of the current SAASM products in the market still do not meet many DOD platforms� size, weight and power (SWAP) requirements. The guidance and control of spinning projectiles/munitions relies on an accurate knowledge of the roll attitude and roll rate measurement which in the past has been obtained by gyros and/or magnetometers onboard. These traditional methods of measuring roll rate and roll attitude are expensive. There is a need to develop an innovative low cost and low power integrated SAASM receiver architecture that can provide the required roll attitude/roll rate measurements for spinning projectiles while meeting future SWAP requirements. The program goals for an integrated Up-Finding SAASM GPS receiver system are: size: 40 mm OD form factor (or less than 2 square inch area); power 1 watt or less; cost less than $1,000 in production, navigation accuracy better than 10 meters; roll attitude accuracy of better than 10 degrees; on a platform spinning up to 300 Hz; gun launched 45,000 g; time-to-first-fix (TTFF) less than 10 seconds for up to 1 second time uncertainty. It is also desirable that the abovementioned SAASM GPS receiver systems have advanced resistance to jamming environments, GPS M-Code compatibility, and other future GPS modernization features. Products available today have, for long, been designed and implemented as an appliqué (RF-in, RF-out) to the SAASM GPS receiver and most of the past developments have focused on non-spinning platforms, such as helicopters and aircraft or spin-stabilized missiles. PHASE I: Develop an integrated SAASM GPS receiver architecture with Up-Finding capability and analyze its feasibility to meet the program goals for spinning projectiles. Document the integrated system architecture and its predicted performance results. PHASE II: Develop a high level system simulation of the entire integrated SAASM receiver system and demonstrate that critical program performance parameters, such as TTFF, and navigation & roll attitude estimation accuracy that can be achieved at high spin rates of 300 Hz. Identify the critical component and devices and qualify these components at 45,000 gs. Develop a detailed program plan to implement the integrated receiver system. PHASE III: Develop and implement the integrated system architecture and the integrated SAASM receiver product in the selected form factor and demonstrate its critical system performance through laboratory and field testing. PRIVATE SECTOR COMMERCIAL POTENTIAL/DUAL-USE APPLICATIONS: Primary applications will be DOD based; precision weapons, unmanned platforms, and hand-held devices such as radios and targeting equipment. Various spin-off technologies could result from this development and be applied to commercial aerospace and transportation sectors. REFERENCES: KEYWORDS: GPS receiver; SAASM; anti-jam; up-finding; low power; gun-launch; projectile; M-Code
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