Ground speed is measured by GPS on modern aircraft. | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		glitchc on Feb 20, 2019 \| parent \| context \| favorite \| on: Boeing 787 Reaches 801 MPH as a Jet Stream Packs R... Ground speed is measured by GPS on modern aircraft.

dzhiurgis on Feb 21, 2019 [–]

Which is probably measured in it's trajectory and then recalculated as ground speed, which is sea level? Wonder if it accounts for sea levers being higher at certain parts of planet?

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact