pjalocha
commented
6 years ago This all depends on what you want/expect.
I would answer this question like this: at the long distance reception you hardly get any packets and at the very far range you often get sporadic reception where you get every 10th packet or so. If you get a single position, and have just the position, no speed, direction, etc. you can hardly say anything about what was happenenig there. But when you have the speed and direction, already by a single packet you know a lot of thing: was the flight at normal envelope or what it abnormal, say falling to the ground. where was it heading, etc. by having the speed you can already draw several more points of the track, not just this single point. WHen you have turning rate, you know even more, for gliders for example you know there were circling or not, climbing, falling - this is essential information when you need to judge was was the situation of the aircraft. When you even get every single point the speed allows you to make consistency check of all the data. So, I would always send this data, especially if the recomended transmission period is like 5 to 10sec.
Is it useful to broadcast the vertical and the horizontal speed from the transmitter since it can be recalculated in the ground-station (receiver) ?
Moustafa Kasbari / Benoit Albouze