AN/ASN-128B Doppler Global Positioning System Navigation System computer display unit from BAE Systems
WAYNE, N.J., 31 Aug. 2005. BAE Systems in Wayne, N.J., is building electronic components for the AN/ASN-128B Doppler Global Positioning System Navigation System aboard variations of the U.S. Army UH-60 Black Hawk and CH-47 Chinook helicopters.
Company engineers are providing the CP-1252C and ASN-128B computer display units and circuit card assemblies for the AN/ASN-128B under terms of the contract awarded Aug. 20 from the Army Communications-Electronics Command at Fort Monmouth, N.J. The contract number is W15P7T-05-C-D026.
The AN/ASN-128B is a Doppler navigation system (DNS) with an embedded global positioning system (GPS) receiver card integrated into the CV-3888 signal data converter (SDC).
The GPS provides one per second updates to the DNS for navigation accuracy. The system provides the complementary advantages of a GPS receiver and a Lightweight DNS.
The system provides continuous velocities, navigation. and guidance. Doppler improves GPS tracking in a jamming environment and minimizes GPS reacquisition time.
When both Doppler and GPS are available, the GPS initializes and automatically updates the Doppler present position. If the GPS is lost, the Doppler continues to provide GPS calibrated velocities for hover and navigation.
If the Doppler is in memory, the GPS continues to provide present position to the Doppler and navigation continues. It provides for the insertion of vertical navigation and tactical landing data and displays coordinated universal time.
The standard AN/ASN-128 computer display module displays both Doppler and GPS data using a paging technique. It contains a new four-line display element designed to reduce pilot workload. The operator may select and display Doppler only, GPS only or combine Doppler/GPS data.
Work will be in Wayne, N.J., and will be finished by 1 June 1 2009.
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