mjb/altos, branch 1.1.9.3

Tag version 1.1.9.3

2013-01-19T05:53:54+00:00

Signed-off-by: Keith Packard

micropeak: Fetch Mac and Windows drivers when creating packages

2013-01-17T18:41:22+00:00

This downloads the FTDI drivers from FTDI during the build process Signed-off-by: Keith Packard

micropeak: Show decimeters in stats window

2013-01-16T23:21:24+00:00

We're promising this kindof accuracy, so we'd best show it off Signed-off-by: Keith Packard

altos: Add Kalman filter to MicroPeak

2013-01-16T23:21:24+00:00

This filters altitudes more accurately and also allows tracking of acceleration, which is used to discard height data generated by ejection charge noise Signed-off-by: Keith Packard

altos: Add computation of MicroPeak Kalman correction coefficients

2013-01-16T23:21:24+00:00

Signed-off-by: Keith Packard

altos: Correct model error covariance matrix

2013-01-16T23:21:24+00:00

Finally found a couple of decent references on how to set the model (process) error covariance matrix. The current process matrix turns out to be correct for a continuous kalman filter (which isn't realizable, of course). For a discrete filter, the error in modeled acceleration (we model it as a constant) needs to be propogated to the speed and position portions of the matrix. The correct matrix is seen in this paper: On Reduced-Order Kalman Filters For GPS Position Filtering J. Shima 6/2/2001 This references an older paper which is supposed to describe the derivation of the matrix: Singer, R.A., “Estimating Optimal Tracking Filter Performance for Manned Maneuvering Targets,” IEEE Transactions of Aerospace and Electronic Systems, AES-5, July 1970, pp. 473-483. This change has a minor effect on the computed correction coefficients; it should respond more reasonably to acceleration changes now. Signed-off-by: Keith Packard

doc: Add simplesect headers to release notes

2013-01-16T18:38:52+00:00

This makes it easy to see which changes are from each version of the software. Signed-off-by: Keith Packard

document what the 'Age' value in the AltosUI display means

2013-01-16T17:46:52+00:00

Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos

2013-01-12T17:57:22+00:00

micropeak: Record samples before boost detect

2013-01-12T17:45:31+00:00

This saves a ring of 16 samples while waiting for boost, and then goes back through those looking for the first sample higher than the ground and writes the remaining ones to the log so that we get a more complete log of the flight Signed-off-by: Keith Packard