VIA Technologies EPIA SN-Series Specifications download pdf (Page 95)

FASTER Engineering Model

BIT Message Definition

Turn detect

0: Yaw rate magnitude < 0.4 deg/s;

1: Unit is executing a turn

Comm Transit

Error

0: No serial port transmit communication failure has been detected; 1:

A serial port transmit communications failure has been detected such

as overrun, parity

Startup Rate Bias

Check

0: Angular rate bias estimates are below 0.8 deg/s and normal

operation can proceed;

1: Angular rate bias estimates during system startup are above 0.8

deg/s. System will continue to operate in high gain mode until sensor

bias stabilizes below this threshold

GPS status

0: GPS 3D solution is valid;

1: GPS unlocked or data packet not present

Algorithm

Initialization

0: Initialization complete

1: Not ready, waiting for power-up, and initialization completion

1 PPS Signal Lock

0: GPS 1 PPS signal locked;

1: GPS 1 PPS signal not locked

EEPROM integrity

0: EEPROM calibration data is valid

1: EEPROM calibration data is corrupted

Magnetometer

Calibration Valid

0: Magnetometer hardiron/softiron calibration valid

1: Magnetometer hardiron/softiron calibration invalid

User Port Comm

Receive Error

0: No user port receive communication failure has been detected; 1: A

user port receive communications failure has been detected

Algorithm

Accuracy

00-GPS available, full accuracy NAV; 01-low accuracy NAV/high

accuracy AHRS, 02-low accuracy AHRS, 03-AHRS initialization

Table 15: NAV420 BIT message definition

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 143 144

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