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Universal’s Loran C Sensor (LCS) was specifically designed to
interface with the Flight Management Systems. The UNS-LCS is a
fully automatic multiple chain Loran C Sensor utilizing an E-field
blade antenna. The LCS is capable of simultaneously using all
available stations in up to three Loran C chains in a true multiple
station, multiple chain navigation solution. Although one LCS may
be input to more than one FMS, each FMS will accept only one LCS
input.
LCS-850 Loran C Sensor (LCS)
Universal’s LCS-850 Loran C Sensor (P/N 1045-01) was specifically
designed to interface with Universal’s Flight Management Systems
(FMS) and Navigation Management Systems (NMS). The LCS-850
functions as an automatic Loran C Sensor utilizing an E-Field blade
antenna. Station selection is multi-GRI or cross chain operation.
The LCS-850 utilizes the following GRIs: 9990, 9980, 9960, 9940,
9610, 8970, 8290, 7980, 7960, 5990 and 5930.
The LCS-850 is for enroute navigation only and is not intended for
use during approach.
Section I
System Description
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Change 1
GPS-1000 and GPS-1200 (GPS)
Universal’s Global Positioning System, GPS-1000 and GPS-1200
were designed to interface with UASC’s Flight Management System.
GPS-1000 and GPS-1200 position is used in conjunction with data
from a combination of VOR, DME, IRS, LCS or OSS to form a
composite FMS position solution.
The GPS-1000 or GPS-1200 Sensor is the source of three
dimensional position and velocity, time and status information. It is a
12-channel receiver, which continuously processes measurements
from all satellites in view simultaneously.
The FMS complies with aspects of TSO C-129 class B1 and C1 in
regards to waypoint displays, scaling, integrity monitoring, predictive
RAIM, etc. when interfaced with the GPS-1000 or GPS-1200. These
sensors also comply with FAA Notice 8110.60 for primary means
remote/oceanic operations.
In the case of the UNS-1C, -1Csp, -1D, and -1K, the internal GPS
sensor is identical to the GPS-1000 sensor, and carries the same
approvals.
OMEGA/VLF Sensor (OSS)
Omega/VLF sensors depend upon reception of Omega navigation
network and VLF (very low frequency) communication radio signals
to compute the aircraft's latitude/longitude coordinates. Omega
signals originate from eight stations around the world. Reception
from at least two stations is required by those units containing their
own rubidium clocks. VLF communication stations supplement the
Omega signals.
The FMS will accommodate Omega/VLF sensors systems (OSS) of
several different manufacturers. Up to two OSSs may be installed.
In some cases, the OSS must retain the manufacturer's Control
Display Unit (CDU).
Universal's UNS-764 Omega/VLF Sensor has been designed for use
with the FMS. The UNS-764 features five independent receiver
channels which track all available Omega and up to eight VLF
stations simultaneously. It is a remotely mounted sensor housed in
a 2MCU box. An optional back-up mini CDU is also available.
Section I
System Description
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Change 1
1-14
GPS/OMEGA/VLF (GPOSS) Sensor
The UNS 764-1 and 764-2 are combination GPS and Omega/VLF
sensors. The Omega/VLF receiver, of both the UNS 764-1 and 764-
2, features five independent channels, which track all available
Omega, and up to eight VLF stations simultaneously. Advanced
synchronization algorithms and the ability to use both primary and
discrete Omega frequencies result in typical Omega sync times of
under 30 seconds.
The UNS 764-1 GPS sensor component utilizes a dual-channel
processing system architecture. All visible satellites are tracked--not
just the minimum of four required for GPS operation. Sequential
tracking provides more frequent Pseudo-Range measurements,
results in a smaller Geometric Dilution of Position (GDOP), and
provides a superior tolerance to temporary signal loss due to
antenna shading caused by aircraft structures or maneuvering.
The UNS 764-2 GPS sensor component features a 12-channel L1
frequency and C/A code receiver which is exactly the same as the
GPS-1200 standalone GPS sensor. The GPS receiver features real
time and predictive RAIM, satellite fault detection and exclusion
capability and carrier phase tracking. It has a horizontal position
accuracy of 30 meters (less than 10 meters with differential). In
addition to enroute and terminal operations, the GPS portion of the
UNS 764-2 can be certified as one of the two required long range
sensors for NAT-MNPS navigation across the North Atlantic. It can
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