Experimental Validation of Aircraft Carrier Dynamic Modeling Software for Sea-based JPALS

Sarah Atwater, Jennifer Bower, Jenny Gautier and Per Enge

Abstract:	The Joint Precision Approach and Landing System (JPALS) is a precision aircraft approach and landing system sponsored jointly by the U.S. Air Force and Navy. This GPS-based system will provide capability for military users to perform assigned conventional and special operations missions from fixedbase, tactical, shipboard, and austere environments under a wide range of meteorological and terrain conditions, including hostile jamming and RFI environments. Seabased JPALS, which focuses primarily on aircraft carrier operations, introduces the added complexity of landing platform dynamics and a challenging multipath environment. A software model has been developed at Stanford University that incorporates ship dynamic modeling software to simulate dual frequency GPS and IMU data for an aircraft and aircraft carrier. This model provides a tool to investigate problems of interest to JPALS, such as multipath, and incorporates several JPALS related options. The user may specify ship and aircraft paths, sea state, GPS time, GPS rate, and IMU noise, as well as select from multiple antenna locations onboard the aircraft carrier. All states for the error modeling are configurable, as are the ship motion parameters. The model is validated using data collected from the USS Harry Truman (CVN-75) in February of 2004. Multipath residuals from the Truman are compared to those predicted by the model.
Published in:	Proceedings of the 2005 National Technical Meeting of The Institute of Navigation January 24 - 26, 2005 The Catamaran Resort Hotel San Diego, CA
Pages:	211 - 218
Cite this article:	Atwater, Sarah, Bower, Jennifer, Gautier, Jenny, Enge, Per, "Experimental Validation of Aircraft Carrier Dynamic Modeling Software for Sea-based JPALS," Proceedings of the 2005 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2005, pp. 211-218.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In