Category Archives: GPS

Full Circle Superior Part I: Point Samples

This week we take a look at Lake Superior through the eyes of Mike Link and his wife Kate Crowley. ┬áMike is the retired founding director of The Audubon Center of the North Woods in Minnesota, an author of 24 … Continue reading

Posted in Backyard Science, General Science, GPS | 9 Comments

GPS: Conclusion

Based on these measurements, following the GLOBE GPS protocol and similar averaging procedures improves the precision of position and elevation estimates by about a factor of two. Biases (being too high or too low) are harder to identify, but the … Continue reading

Posted in Backyard Science, GLOBE Protocols, GPS | 1 Comment

More about GPS: Test for Elevation

If you’ve used a GPS unit, you know that the elevation readings vary faster than latitude or longitude readings. Sometimes the elevation readings change rapidly. Thus, when I took my GPS readings, I wrote down the elevation, than I wrote … Continue reading

Posted in Backyard Science, GLOBE Protocols, GPS | Leave a comment

More about GPS: Test for Position

Those of you who have taken GPS measurements to characterize your GLOBE observation site know that the “elevation” on the GPS unit often varies a great deal. That’s one of the reasons the GPS protocol requires that you take five … Continue reading

Posted in Backyard Science, GLOBE Protocols, GPS | 2 Comments

Taking GPS Readings — Part I

In GLOBE, you use careful measurements to learn things about our environment just as scientists do. Also, some of the data you take for GLOBE is used by scientists. Finally, what you learn from GLOBE about how to take measurements … Continue reading

Posted in Backyard Science, GLOBE Protocols, GPS | Leave a comment