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US Army ATC Precision Approach Landing Systems Past, Present and Future

John Traylor

Technical Chief

Office of the Product Manager, Army Air Traffic Control

Distribution A: Approved for Public Release

1

Army ATC Precision Approach(PA) Requirements

· Historically Joint PA requirements have not been defined or documented prior to JPALS · There is no specific formal requirement for approaches exceeding CAT1 · The lack of specific operational capabilities and details in current requirements leads to new versions of old systems (cut and paste) · Assumptions based upon "required" compatibility / interoperability with civilian General Aviation aircraft are not documented in military requirements

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The Past (solutions looking for a problem)

· Systems were developed based upon technology without the essential buy in / endorsement of the user community or mutually accepted requirements · Systems were typically service specific solutions based upon current equipage level of that services fleet · This resulted in few ground systems developed and deployed and few aircraft equipped to utilize them to their full potential or new systems emerged stripping funding (i.e. LAAS) · Specific examples include: · Microwave Landing System (MLS) · Transponder Landing System (TLS) · Autonomous Precision Approach Landing System (APALS) · Local Area Augmentation System (LAAS)

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The Present (New Versions of Old Systems)

· Present Systems were developed based upon technology developed in:

1929 - Instrument Landing System (ILS) 1945 - Precision Approach Radar (PAR) 1948 - Distance Measuring Equipment (DME)

· Up to now, and largely due to past failures mentioned, new PA technology has often been regarded with suspicion if not ignored all together by both the ATC and user communities · There is no formal mandate, order, or requirement to upgrade Precision Approach capability beyond that which is now fielded · Maintenance and obsolescence costs of present systems will ultimately become the primary requirement generator influencing procurement of new PA systems

Distribution A: Approved for Public Release 4

Present Army ATC Tactical Navigation Systems and Aids

Air Traffic Navigation, Integration Coordination System (ATNAVICS) Air Surveillance System with Precision Approach Radar (PAR)

Non-Directional Radio Beacon

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5

Army FBPAR and ILS Locations

Europe North America

14 ILS 17 FPBAR 1 ILS 3 FBPAR

Asia

1 ILS 1 FBPAR

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6

The Future (Development Driven by Requirements)

· Use joint commonality as a key requirement for both ground and airborne PA systems across platforms and services

· JPALS has captured this requirement · Deployable ILS is being developed by AF as an interim solution moving away from PAR as a tactical PA solution

· Clearly define the users of US Army PA services · Ensure fixed base and tactical PA capabilities match and are INTEROPERABLE · Ensure interoperability with domestic and international PA systems in development · Establish a roadmap and time line for system succession · Acknowledge that no system can or will be perfect and weigh risk accordingly.

Distribution A: Approved for Public Release 7

Projected Army JPALS Locations

Europe North America

28 4

Asia

1

Kwajalien 1

Increasing Precision Landing Capability by 50 %

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Army Planning Summary for JPALS

Army JPALS aircraft (Inc 1 ­ Sea Based) and (Inc 2 ­ Land Based) IOC synchronized to achieve operational capability

Current Land Based JPALS IOC and JPALS Aircraft System Army IOC (inclusive of sea based capability) have been aligned to provide capability on the ground slightly in advance of aircraft capability

Aircraft implementation of both Inc 1 and Inc 2 performed concurrently to optimize development, testing, and fielding costs Army plans to integrate advanced GPS upgrades concurrently Aircraft IOC is defined as a company of UH-60M aircraft, with subsequent platform integrations to follow Nearly all Army aircraft will be JPALS equipped by 2024 Army continues to invest significant resources in trade studies and risk reduction efforts to minimize future aircraft integration complexities and costs

Distribution A: Approved for Public Release 9

Army Aviation Navigation Migration Plan

FY08 FY09 FY10 FY11 FY12 FY13 FY14 FY15 FY16 FY17 FY18 FY19 FY20 FY21

SHIPBOARD AIRBORNE AVIONICS LAND

JPALS Inc 1A JPALS Inc 1B JPALS Inc 2

Army Aviation Navigation Baseline

GPS P3I

RNP RNAV

Upgrades

JPALS

EGI

CN-1689 (V)17-20

DGNS

AN/ASN-128D

EGI

Upgrades

DGNS

Upgrades

JPALS CAT 1 Approach LAAS / WAAS DME

MGUE

Military GPS User Equipment

SAS

Small Antenna System

VOR / ILS

VOR / ILS

DME VOR / ILS JPALS

Fielding 10

JPALS

Risk Reduction Technology Development

JPALS

Engineering Manufacturing Development Distribution A: Approved for Public Release

Distribution A: Approved for Public Release

11

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US Army ATC Precision Approach Landing Systems Past Present and Future

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