3. Sensors and integrations#

3.1. Compass#

Manufacturer, sensor

Accuracy

Slocum

Spray

Seaglider

Seaexplorer

PNI, TCM3

0.5º

x

PNI, TCM2.5

0.8º

x

PNI, TCM Prime

x

x

Sparton, SPD3003D

to be documented

x

Known issues:

  • Compass calibration needed

  • Old Seaglider software (not sure if still current) used to take several seconds to wait for values to converge before returning the final value.

3.2. GPS#

  • Garmin 15H-W (SeaGlider)

  • EB-870 GPS engine board with a JDGA QVA Active GPS Antenna (SeaExplorer)

Known issues: When gliders drift on surface before the first GPS fix, it needs to be corrected. Fix duration / HDOP minimum requirements can be set by users on some glider models.