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INS-20

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The Sparton INS-20 is a MEMS-based Inertial Navigation System that integrates SAASM GPS with the industry-leading heading accuracy of the Sparton AHRS-M2. A compact, low power INS, the INS-20 provides full self-location and navigation capability, including latitude, longitude, altitude, heading, pitch, roll, and velocity in GPS deprived or denied environments.

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  • Selective Availability Anti-Spoofing Module (SAASM)

  • Rockwell Collins microGRAM™ SAASM GPS coupled to Sparton AHRS-M2 through AdaptNav™ filter algorithm

  • Sparton AdaptCal™ 3D adaptive in-field calibration with hard and soft magnetic interference compensation

  • Powerful user programmable sensor customization apps via Sparton NorthTek™ Forth interpreter

  • Improved GPS tracking with position data output rate of 100 Hz

  • Static Heading Accuracy of 0.2° RMS

  • Small form factor of 31g for combined system

  • Magnetic and True North heading, pitch, and roll measurement

  • Full 360° rollover capability using quaternions or rotation matrix

  • Aggressive satellite acquisition/reacquisition strategies improve performance and reduce power consumption

  • Extended performance in a jamming environment – 41 dB while tracking – 24 dB during initial satellite acquisition

  • “Figure of Merit” real time heading error indicator

  • Quality of in-field calibration indicator

Dynamic Heading Accuracy

1.0° RMS

Static Heading Accuracy

0.2° RMS (<1.0⁰ RMS from -40⁰ to +70⁰ C)

Dynamic Pitch/Roll Accuracy

1.0° RMS

Static Pitch/Roll Accuracy

0.2° RMS

Pitch/Roll Repeatability

0.1° RMS

Pitch/Roll Range

± 90°, ± 180°

Accelerometer Range

± 4g (± 1g)

Accel Noise Density

250 ug/√Hz

Accel Bias Stability

0.07441 mg

Accel Velocity Random Walk (VRW)

0.09123 (m/s)/√Hr

Gyro Dynamic Range

± 500°/sec (± 300°/sec)

Gyro Noise Density

0.04 dps/√Hz

Gyro Bias Stability

6.415°/Hr

Gyro Angular Random Walk (ARW)

0.2546°/√Hr

Magnetic Range

±1.2 Gauss (±900 MGauss)2

Update Rate (Samples/Sec)

AHRS-M2: 100 Hz; microGRAM: 1 Hz

Baud Rate

Up to 115.2 kbaud

L x W x H

INS-20 Board: 64.52 x 46.23 x 11.86 mm (2.54 x 1.82 x 0.467 inches); AHRS-M2: 38.4 x 22.9 x 9.1 mm (1.51 x 0.90 x 0.36 inches)

Mass

31.3g (INS-20 Board, 19g; AHRS-M2, 12.3g)

Encapsulated or Enclosure

Yes

Operating Temp

-40° to +85° C

Storage Temp

-40° to +85° C

Velocity Accuracy

0.04 m/sec steady rate (3D 95%)

Operating and Storage Temperature

-40° to +85° C

Acquisition Time

TTFF (95%): <10sec hot start, 90 sec warm start;, TTSF (95%): <20 sec (Off or Standby <15 min);, TTSF (95%): <55 sec (Off or Standby <60 min)

WAGE

<4 m CEP

Position Accuracy

DGPS: <2 m CEP

Time Accuracy

100 nanoseconds

Dynamics

Velocity: 1,200 m/sec max; Acceleration: 9g max

PPS

<12 m CEP

Humidity Resistance

95%, 70° C, 24 hrs Meets MIL-STD-202G – Method 103A, Test Condition A

Shock Resistance

INS-20 Board: 600g, 1ms Pulse, Half-Sine Wave; AHRS-M2: 5000g, 1ms Pulse, Half-Sine Wave

Vibration Resistance

.02 dB Power Spectral Density, 5.35 G RMS, Meets MIL-STD-202G – Method 214A, Test Condition I/C

Power Supply

+4 to +10V DC

Input Power, Sleep Mode (Typical @ 4v)

50 mW

Input Power, Operating Mode (Typical @ 4V)

1 W (<0.5 W GPS disabled)

3.3V Logic UART Interface

Yes

3D and Adaptive In-Field Calibration

Yes

Able To Maintain Function When Inverted

Yes

Quaternion/Rotation Matrix Output

Yes

True North Heading Output

Yes

Includes World Magnetic Model

Yes

RoHS Compliant

Yes

Maximum Magnetic Inclination (Dip)

± 80°

NorthTek™ User Programmable Customizations

Yes

Fully Temperature Compensated

Yes

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INS-20 Datasheet

Product Datasheet for INS-20 Product Data Sheet

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AHRS-M2 Datasheet

Product Datasheet for AHRS-M2

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AdaptNav Datasheet

Product Datasheet for AdaptNav

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NorthTek Datasheet

Product Datasheet for NorthTek

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AHRS-M2 Integration Guide

Integration and Calibration Guide for the AHRS-M2

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AHRS-M2 Quick Start Guide

Quick Start Guide for the AHRS-M2

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AHRS-M2 Software Interface Control Document

Software Interface Control Document (ICD) for the AHRS-M2

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AHRS-M2 Hardware Interface Control Document

Hardware Interface Control Document (ICD) for the AHRS-M2

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NorthTek Programming Manual

User Manual for the NorthTek Programming Language

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AHRS-M2 NorthTek Script Files

NorthTek script files for the AHRS-M2

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AHRS-M2 Assembly STEP Files

STEP file for AHRS-M2 Assembly

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Remote Function Select (RFS) Protocol Suite

Remote Function Select (RFS) Protocol Suite for AHRS-M2

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AHRS-M2 Version 2.7.3 Release Notes

AHRS-M2 Release Notes for Software Version 2.7.3

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AHRS-M2 Version 3.0.5 Hex Files

Hexidecimal files for the AHRS-M2 Software Version 3.0.5

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Application Note 1008E

Firmware upgrade procedure for the AHRS-M2

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