satellite.model: Function to create a satellite model object for metropolis...

In mdsumner/tripEstimation: Metropolis Sampler and Supporting Functions for Estimating Animal Movement from Archival Tags and Satellite Fixes

Function to create a satellite model object for metropolis location sampler

Description

A model to manage likelihood functions, environmental masks and behavioural likelihood functions for pre-derived satellite locations. There are some options for configuration, but this may be considered a template for any given model. The model function exists simply to make the object construction simple.

Arguments

day	vector of date-times for each light level
X	matrix of pre-derived satellite locations
proposal.x	function from object managing X proposals
proposal.z	function from object managing Z proposals
mask.x	lookup function for X's against masks
mask.z	lookup function for Z's against masks
fix.release	logical - is the release point known?
fix.recapture	logical - is the recapture point known?
start.x	starting positions for the primary locations, see position.logp
start.z	starting positions for the intermediat locations.
posn.sigma	variance for locations
behav.dist	distribution to use for behavioural constraint
behav.mean	mean to use for behavioural distribution
behav.sd	variance for behavioural distribution
proj.string	PROJ.4 string for coordinate system used

Details

posn.sigma may be a single value for all estimates, or a vector of values for each position estimate.

Transformation of coordinates is supported via a simple function that only performs coordinate transforms if proj.string is not longlat.

Value

See solar.model for some related detail.

Note

These are simple wrapper functions to create the desired model for use in metropolis. These models are structurally very simple and may be easily edited as required.

Author(s)

Michael D. Sumner

References

Sumner, Wotherspoon and Hindell (2009). Bayesian Estimation of Animal Movement from Archival and Satellite Tags, PLoS ONE. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0007324

See Also

See also solar.model for the counterpart model for estimating positions for light tags.

mdsumner/tripEstimation documentation built on May 2, 2023, 12:49 p.m.