GPS-IU
Abstract
Global Positioning System (GPS) Interface Unit (IU) Upgrade will replace three Circuit Card Assemblies (CCA) in the GPS-IU, as well as the backplane (to integrate the new and old CCAs): the Central Processing Unit/1553, the power supply CCA, and the video graphics card. The current inventory of GPS-IU (76 installed on B-52H, plus current inventory levels of 17, plus 1 in the System Integration Laboratory (SIL)) will be upgraded by Prime Contractor Boeing, and the upgraded LRUs replaced using blue-suit installation, using remove-and-replace processes on the flight line (the current maintenance process). This is a new initiative upgrade to the B-52H platform. GPS-IU acts as a controller and a communications path between onboard computer systems, ensuring data needed by one system is available in the correct format for the requesting system. Originally developed with a 33MHz processor with 4MB of Static Random Access Memory (SRAM), the GPS-IU has become overloaded as more software has been added to the B-52. Currently operating at 86% throughput capacity and at 90% memory capacity, it is projected to exceed the designated safety threshold of 95% memory load by 2018. The GPS-IU is also facing parts obsolescence issues. Studies show that the current spares will be exhausted by 2018. The upgrade will address obsolescence, as well as increase memory and throughput capacity to ensure future modernization efforts are successful. GPS-IU requires upgrading to incorporate any other GPS dependent capabilities on the B-52 platform. B-52 fleet will have the capability to carry additional GPS dependent weapons and targeting pods, and the increased capacity to incorporate future GPS-dependent capabilities beyond 2018.
Document Details
- Document Type
- Project
- Publication Date
- Oct 01, 2016
- Source ID
- 675055_0101113F_7_3600_PB_2016
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