Page 6 - EMCORE Navigation & Inertial Sensing Brochure

Closed-Loop FOG IMU & IRU

EMCORE’s FOG IMUs now include the products of the former L3Harris Space & Navigation, which has been the premier supplier of
ineRTial MeaSUReMenT UniTS & naVigaTiOn SySTeMS
mission-critical precision pointing and navigation systems since the early days of the U.S. space program. This enables EMCORE to
offer an even wider range of FOG-based inertial measurement unit products from tactical to navigation and strategic grade.

EN-300 Precision FOG IMU
EMCORE’s EN-300 Precision FOG IMU is a higher accuracy inertial system that is form, fit, and
function compatible with a legacy equivalent, but with the better performance needed for GPS
denied navigation, precise targeting, and line-of-sight stabilization. This state-of-the-art design
incorporates EMCORE’s proprietary integrated optics to enhance accuracy, providing up to ten
times better performance than competing systems.
Features/Benefits Applications
n Three-axis, precision closed-loop FOG IMU using n UAVs
EMCORE’s proprietary FOG transceiver n Dismounted soldier
n More than double the fiber length of legacy IMUs n Oil and gas exploration
n Three precision MEMS accelerometers with greater n Ground vehicle navigation
pendulocity than legacy designs
n Far target pointing-stabilization
n Factory programmable I/O with exceptional flexibility n Applications where GPS unavailable
and performance options

EMCORE EN-300 FOG IMU vs. COMpEtItOR

EMCORE EN-300 Northrop Grumman LN-200
Parameter Gyro Channels Acceleration Channels Gyro Channels Acceleration Channels
Performance
Bias 0.1°/hr - 0.4°/hr 300 μg 0.5°/hr - 3°/hr 300 μg - 3.0 mg
Bias In-Run Stability 0.02°/hr - 0.08°/hr 0.1 mg N/A N/A
Random Walk (Noise) <0.008°/√hr - 0.03°/√hr 0.025 m/s/√hr <0.07°/√hr - 0.15°/√hr N/A
Bandwidth ≤1800 Hz N/A
Physical & Environmental
Operating Temperature Range -40 °C to +71 °C -54 °C to +71 °C
Dimensions 3.5”D x 3.35”L 3.5”D x 3.35”L
Weight <1.8 lbs <1.65 lbs
Volume 33 cubic in. <35 cubic in.

CIRUS Compact Inertial Reference Units (IRU) for Space (CIRUS & CIRUS-EX) CIRUS
CIRUS EX
CIRUS-A High-Performance FOG IMU
The CIRUS leverages over sixty years of experience and proven performance in systems de-
ployed in space and is designed and qualified as the next-generation product. The CIRUS and
CIRUS-EX rate sensors deliver two different strategic grades of performance combined with
the benefits of a compact, low-cost system in an integral chassis. The CIRUS-A FOG IMU is a
state-of-the-art, strategic-grade inertial measurement unit for inertial navigation, guidance,
pointing and stabilization of missile, space, sensor, ground, air, and marine applications.
CIRUS A
Features/Benefits
n Strategic-grade performance n High-reliability Class S and K Rad-hard Applications
electronics (CIRUS and CIRUS EX)
n Two performance grades with lowest ARW n Spacecraft attitude control
<100 μ°/√hr (CIRUS and CIRUS EX) n Each sensor is individually power-select- n DoD, NASA and commercial missions
able providing ultimate flexibility
n Four gyros and dual A/B electronics provide n Vehicle/platform stabilization navigation
redundancy for enhanced mission success n User-selectable thermal set points and
capability to execute “on-station” com- n Pointing and Northfinder applications
n Dual-redundant serial interfaces mands for optimal situational awareness n Missile guidance systems
(MIL-STD-1553 and RS-422)
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