Athena 311 from Rockwell Collins gives you a tactical-grade navigation solution with high performance, integrated flight control system, GPS and air data/attitude and heading reference system. And it features attitude and heading information with static and dynamic accuracies superior to those of traditional spinning-mass gyros.

The unit includes solid-state Micro Electro Mechanical Systems (MEMS) gyros and accelerometers. Kalman filtering algorithms provide online bias calibration of the MEMS sensors by using information from the integrated GPS, barometric altimeter and external magnetometer. In addition, the Athena 311 includes pressure ports for a complete air-data suite, including airspeed and flow angle measurements.

Key Features & Benefits
*Excellent flight systems management and payload control: Offers a full range of analog and digital I/O interfaces and dedicated computers, plus an integrated development environment for customer-developed software.
*Full range of autopilot and mission management: Includes functions such as autonomous landing and route navigation.
*Three independent central processing units that support flight control, mission management and payload functions
*Ability to connect with a wide variety of five-hole probes with option to use a standard, pitot/static probe if angle of attack and angle of sideslip are not needed
*Kalman filtering algorithms provide full INS and attitude solution
*Accurate roll, pitch and heading in dynamic environments and sustained turns
*Full air-data measurements including AoA and sideslip
*Autonomous vehicle control and integrated sensor suite

Specifications

Performance
INS/GPS Performance:
Update Rate: 50 Hz
Start-up Time: 10 seconds (initial attitude); 1 minute (full alignment)
Heading Range: ? 3.14 rad (? 180 deg) with an external magnetometer attached
Pitch Attitude Range: ? 1.57 rad (? 90 deg)
Roll Attitude Range: ? 3.14 rad (? 180 deg)
Altitude Range: -609.6 m to 15,240 m (-2,000 ft to 50,000 ft)
Baro-inertial Altitude Accuracy: < 13.7 m (45 ft) at sea level, < 76.2 m (250 ft) at 12,192 m (40,000 ft) altitude
GPS Range: Worldwide
Lat/Long Position Accuracy: GPS C/A code; differential-ready
GPS Antenna Power: 5 V
Airspeed Accuracy: < 2 knots @ 40 knots, < 1 knot @ 60 knots
Max Airspeed 85 m/s: (165 knots)

IMU Performance:
Maximum Angular Rates :? 3.49 rad/s (? 200 deg/s)
Maximum g Range: ? 8 g

Attitude/Heading Accuracy (1 Sigma) with GPS:
Pitch/Roll Accuracy: 1.74 mrad (0.1 deg)
Heading Accuracy: 5.24 mrad (0.3 deg)

Attitude/Heading Accuracy During Extended GPS Outage (1 Sigma):
Pitch/Roll Accuracy: 8.73 mrad (0.5 deg)?
Heading Accuracy: < 17.5 mrad (< 1.0 deg)?
?Dependent on the accuracy of the measured external magnetic field

Physical Specs
Size: 10.2 x 12.7 x 15.3 cm (4 x 5 x 6 in) without mounting flanges;
10.2 x 15.3 x 17.3 cm (4 x 6 x 6.8 in) with mounting flanges/heat sink
Weight: 2.5 kg (5.5 lb)
Enclosure:Aluminum
Input Power: 18-36 VDC (28 volt DC system)

Power
Power consumption is 18 watts nominal with outputs driving open circuit 40 watts peak. Input power current limiting is not provided internal to the unit. We recommend that the input power is current limited externally. Inrush current can be 50 A peak with a low impedance source for a duration of ~1ms.

Enviromental
Operating Temperature: -40 to 70 deg C
Operating Vibration Provisioned for passive isolation,: MIL-STD-810F
Humidity 95% relative humidity, non-condensing per :MIL-STD-810F, Method 507