A new 10Hz GPS is available on SF and it looks a lot more sturdy than the Venus module... Does anyone has it?
http://www.sparkfun.com/commerce/product_info.php?products_id=9758
A new 10Hz GPS is available on SF and it looks a lot more sturdy than the Venus module... Does anyone has it?
http://www.sparkfun.com/commerce/product_info.php?products_id=9758
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Not sure what latency on the SUP500 is but otherwise it looks OK in the compassion SparkFun did (thanks SparkFun).
I will post to this thread when I get some time to work on the code.
Troy
I think the new GPS to be supported by DIY drones is this MediaTek with adapter...
it's really cheap and you only need the cable sold in the DIY drones store to connect it to your board
Daniel
Thus, if your drone is flying at 100mph, the GPS output will lag by 44' (at 300ms) at best, or 292 feet at worst! If you're banking in a turn, it gets even worse since the computed vector no longer resembles your flight path. It is for that reason that I stress the necessity for integrating GPS latency into the kalman filter computations, so that a true bearing correlation is derived (see paper).
For any given satellite signal, multiple receiver channels can be attempting to align their locally generated despreading codes with the receive signal in parallel. As long as these locally generated despreading codes have different alignments, a lock (despeading code aligned with received spreading code) will be achieved faster.
Beyond locking from cold and warm faster, there's probably not a lot of difference to more modestly endowed GPS receivers.
Andrew
Imagine what happens when almanach has 24 positions in memory and you turn on the GPS and it sees a fresh 11 sats. It is not sure which are what so it puts the data incoming into the empty slots. This requires up to 35 slots. Progressively as the data is complete the results from different processing pipes are merged into one updated processing channel and spare pipes are liberated.
This is my theory why it should be beneficial: faster time to 1st lock in some cases, or faster recovery from total lockout.
Theoretically.
Potentially.
Hoping most people will see that 65 is bigger than 30, and bigger must be better. But as I understand and so do you. There are only 24 in orbit and most of the time at least 1/2 of those are on the wrong side of the earth (out of view).
Troy