Core Avionics Master Plan - NAVAIR - U.S. Navy

Core Avionics Master Plan 2011 Appendix A-31. Current Capabilities.GPS Antenna System–1 (GAS-1) Controlled Reception Pattern Antennas(CRPA) with matching Antenna Electronics (AE) have been integrated into platforms toenhance the anti-jam capability. Integration of non-SAASM GPS user equipmentrequires a waiver (Chairman Joint Chiefs of Staff directive effective October 2006). Non-SAASM configured operators are at increased risk of losing GPS signal to jamming orspoofing, which could result in loss of navigational position and precise timing requiredto synchronize voice or data-link communications systems. Anti-Spoofing has to do withencryption and keys that protect the receiver from using false signals. Multiple systemsare being integrated into platforms but only have commercial GPS cards. Use ofcommercial GPS adds great risk to mission completion as commercial GPS only usesone GPS frequency (L1) and is much more susceptible to jamming and unintentionalinterference. Training to ensure operators understand commercial GPS susceptibilitiesshould be provided if these systems are fielded.2. Advanced Research and Technology Development.Military Space Signal and User Equipment Enhancements. (2010-2013) SmallerGPS antennas and AE are being developed for space-constrained aircraft and smallUnmanned Aerial Systems. JPALS compatible beam-steering AE is also beingdeveloped for JPALS platforms.3. Funded Enhancements and Potential Pursuits.Digital Antenna, Advanced Digital Antenna Production (ADAP). (2010) TheADAP antenna system is an evolutionary upgrade to the existing GAS-1. It has thesame form and fit but increases functionality through digital processing. ADAP willprovide the most advanced anti-jam technology currently available. It achievesincreased nulling capability using simultaneous dual frequency nulling on both L1 andL2 signals. ADAP has forward compatibility with M-Code and other planned GPSupgrades. ADAP Fleet installs have started and multiple forward fit platforms areplanning to use ADAP.Reduced Radar Cross-Section (RCS) Antenna. (2013) F/A-18 needs improvedGPS signal availability to support the Active Electronically Scanned Array (AESA) radarsystem and Precision Guided Munitions (PGMs). The F/A-18 Program Office isintegrating Navigation Warfare (NAVWAR) protection that will include a ConformalCRPA (C-CRPA) GPS Antenna, which is optimized for low observability requirements.The F/A-18 NAVWAR integration will include the C-CRPA, the ADAP AE and theAccurate Navigation (ANAV) receiver.Improved Signal Robustness, Anti-Jam and Anti-Tamper (M-Code Receivers).(2018) GPS III is the next generation GPS Satellite constellation and control segment.12 have been launched so far. It is currently anticipating Full Operational Capability(FOC) in 2015. It will employ the military exclusive waveform (M-Code) that will enableenhanced anti-jam capability and signal security, as well as a flexible signal powercapability and improved cryptographic protection. The new satellites will alsoincorporate the capability to boost or concentrate the signal (Spot Beam) to increasesignal retention and anti-jam margin. GPS receivers will incorporate the first M-Codecapable cards in 2016, along with improved anti-tamper functionality.A-3 Navigation 10