Difference between revisions of "Compass calibration"
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Compass calibration requred before measurement if using a GPS. Calibration and evaluation less than 2 degrees according to RDI guidance. Better yet, should be less than 1 degree (evaluation) from USGS guidance. | Compass calibration requred before measurement if using a GPS. Calibration and evaluation less than 2 degrees according to RDI guidance. Better yet, should be less than 1 degree (evaluation) from USGS guidance. | ||
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| + | We now use the Homan method to calibrate the streampro compass. It works best if you turn the instrument until you get a green bar. Then hold for 5 seconds or so. Then slowly turn the instrument until you get the next green bar. Then stop and hold for 5 seconds again. Continue on with this until you are finished in a complete circle. Then you will have to repeat it again for the evaluation and it will give you your score at the end. You should get less than 2 degrees. | ||
Revision as of 09:42, 29 June 2011
Compass calibration requred before measurement if using a GPS. Calibration and evaluation less than 2 degrees according to RDI guidance. Better yet, should be less than 1 degree (evaluation) from USGS guidance.
We now use the Homan method to calibrate the streampro compass. It works best if you turn the instrument until you get a green bar. Then hold for 5 seconds or so. Then slowly turn the instrument until you get the next green bar. Then stop and hold for 5 seconds again. Continue on with this until you are finished in a complete circle. Then you will have to repeat it again for the evaluation and it will give you your score at the end. You should get less than 2 degrees.
