The effects of any budget/program decisions made since the information was collected during 1997-98 are NOT reflected in the National Security Space Road Map (NSSRM).

(U) Fixed Reception Pattern Antenna (FRPA)/Antenna Electronics (AE-4)

-Description
-Initiatives
-Links
-Impacts
-Requirements
-Lead
-Programmatics
-Categories
-POC
-Images
-Road Map
-Text Version

Overview (U):

(U) The Fixed Reception Pattern Antenna (FRPA) and Antenna Electronics (AE-4) are used in conjunction to receive signals from the GPS satellites. They are used in aircraft, on board ship, and in manpacks.

Description (U):

(U) Fixed Reception Pattern Antennas (FRPAs) have been developed for aircraft and shipboard use with GPS receivers. These comprise a single element, omni-directional antenna to receive GPS satellite signals from about five to ten degrees above the horizon and up. The FRPA-3 is used for aircraft applications, the FRPA-GP (a FRPA-3 mounted on a ground plane) is used for shipboard applications, and the FRPA-4 is used with the Manpack.

(U) Antenna Electronics (AEs) are used for three basic purposes: to amplify the incoming GPS signal to support longer cable runs to the GPS receiver; to convert the incoming GPS signal to the required Intermediate Frequency (IF); and to process adaptively the signal received from a Controlled Reception Pattern Antenna (CRPA) to reduce the effectiveness of any received jamming signals (AE-1/AE-1A only). Current models are the AE-1/AE-1A, which operates with the CRPA-2, and the AE-4, which is used with the FRPA-3 and FRPA-GP.

User Impact (U):

(U) The FRPA/AE is used to receive GPS signals and route them to GPS receivers in airborne and ship applications providing highly accurate, all weather navigation and timing information to the aircraft allowing more precise flight patterns, rendezvous, and weapons delivery.

Programmatics (U):

(U) Operational.

(U) Organizations and Funding:

(U) Air Force.

Images (U):

Name Title

AE-4 Antenna Electronics

FRPA Fixed Reception Pattern Antenna

This Table Is Unclassified.

This Table Is Unclassified.
Name	Title
AE-4	Antenna Electronics
FRPA	Fixed Reception Pattern Antenna

Related Initiatives (U):

Name Title

CRPA/AE-1 Controlled Reception Pattern Antenna (CRPA/AE-1)

GAS-1 CRPA/AE GAS-1Controlled Reception Pattern Antenna (CRPA)/AE

GPS Block IIA NAVSTAR Global Positioning System(GPS) Block IIA

GPS Block IIF NAVSTAR Global Positioning System(GPS) Block IIF

GPS Block IIR NAVSTAR Global Positioning System(GPS) Block IIR

This Table Is Unclassified.

This Table Is Unclassified.
Name	Title
CRPA/AE-1	Controlled Reception Pattern Antenna (CRPA/AE-1)
GAS-1 CRPA/AE	GAS-1Controlled Reception Pattern Antenna (CRPA)/AE
GPS Block IIA	NAVSTAR Global Positioning System(GPS) Block IIA
GPS Block IIF	NAVSTAR Global Positioning System(GPS) Block IIF
GPS Block IIR	NAVSTAR Global Positioning System(GPS) Block IIR

Related Requirements (U): None.

Related Categories (U):

Name Title

Antennae Antennae

This Table Is Unclassified.

This Table Is Unclassified.
Name	Title
Antennae	Antennae

Road Map Placements (U):

Name Title

NAVIGATION SPACE FORCE ENHANCEMENT: NAVIGATION

This Table Is Unclassified.

This Table Is Unclassified.
Name	Title
NAVIGATION	SPACE FORCE ENHANCEMENT: NAVIGATION

Requirements, Funding and Additional Hotlinks (U):

(U) None.

Lead Office (U):

Air Force.

(U) DoD: USD(A&T) and OASD(C3I), Pentagon, Washington, DC
(U) Service Staff: SAF/AQS, Pentagon, Washington, DC
(U) Major Command: HQ AFSPC/DR, Peterson AFB, CO: HQ ACC/DR, Langley AFB, VA
(U) Program Management; SMC/CZ, Los Angeles AFB, CA

Point of Contact (U):

(U) Maj Chuck Kastenholz, SMC, Open Phone: (310) 363-6402.

Date Of Information (U):

(U) 01 November 1997

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(U) For comments/suggestions contact: Office of the National Security Space Architect (NSSA), 571-432-1300.

(U) Road Map Production Date: 23 June 2001