Re: [Dunny] Recon HUD for wing-suits
i spoke with recon about these goggles and found out some interesting info on the horizontal (groundspeed) gps sensor....
it only refreshes at 1hz
i copied this from dz.com its my post.
advantages to a 5hz system over the 1hz:
1.faster satellite acquisition times
*recon states turn them on a few min before you get in the plane, and they will probably loose signal in the plane and have to re-acquire the signal after you exit the plane approx 20-30 sec
2.better accuracy
*if the gps refreshes 5x faster there will be a difference in accuracy
3.smoother gps tracks for you to interpret.
4.less display lag
*recons hud claims its refresh rate can be faster at the sacrafice of battery life, but the gps horizontal is limited to 1refresh per second.
5. almost real time data
*the difference is 5hz refreshes 5x faster than 1hz meaning every .2 sec it refreshes
almost every new gps for pilots are 5hz
almost every gps for UAVs are 5hz
allot of automobile gps units have moved to 5hz
we usually fly our wingsuits around 100mph forward speed, this equates to 146.6 feet per second.
at a refresh rate of 1hz you can be 146.6 feet behind where the gps thinks you are
when you raise the refresh rate to 5hz you are only 29.3 feet behind where the gps thinks you are.
a difference of 117.3 feet traveled.
the recons calculate glide ratio with two sensors: gps for forward speed and a barometer for altitude. would it not make sense to have these refresh at the same rate so the glide ratio can be properly calculated in real time instead of the barometer refreshing 10X faster than the gps?