DistWeight: Distance wheighting
In Rquake: Seismic Hypocenter Determination

Distance weighting for non-linear earthquake location.

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DistWeight(dist, err, distwt)
DistWeightLL(lat, lon, elat, elon, err, distwt)
DistWeightXY(x, y, ex, ey, err, distwt)

`dist`	distance in km
`err`	sigma error in seconds
`distwt`	distance weighting parameter
`lat`	Latitude
`lon`	Longitude
`elat`	Event Latitude
`elon`	Event Longitude
`x`	station X(km)
`y`	station Y(km)
`ex`	event X (km)
`ey`	event Y (km)

Based on Lquake scheme from University of Washington. If you need to reduce the effect of distance weighting, increase distwt.

Since the hypocenter moves between each iteration, the distance weighting is updated.

vector of weights

Jonathan M. Lees<jonathan.lees@unc.edu>

1	DistWeight(1:10, .4, 20)

Rquake documentation built on Dec. 16, 2020, 5:06 p.m.

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