Question on diveMove

Hi, the summary statistics for some dives appear to be strange-the beginning of the ascent time is listed as occurring before both the beginning and end of the descent time. It seems to always have this 5 minute offset. The times given don't seem to translate onto the plotTDR time and phases either. I can't work out what I've done to cause this or how to address this?

As an example this specific dive (number 445) says: begdesc: 2016-07-23 08:05:00 enddesc : 2016-07-23 08:05:00 begasc: 2016-07-23 08:00:00

But when viewing the TTDR none of these numbers seem to match and the 'bottom phase' seems to be marked as DA/ A.

TTDR of dive 445:

I'm still working on optimizing the ZOC, but I don't think this would cause the issue? Sorry for the noob question and thanks so much in advance :)

sample data- example.csv (more occur in the whole dataset)

ifile <- "example.csv"
tdrX <- readTDR(ifile, dateCol=6, timeCol=7, depthCol=11, concurrentCols=NULL,
                dtformat="%d-%b-%y %H:%M:%S", subsamp=
[example.csv](https://github.com/spluque/diveMove/files/9910111/example.csv)
300)

dcalib2 <-calibrateDepth(tdrX,
                        wet.thr = 3610,  # (seconds) At-sea phases shorter than this threshold will be considered as trivial wet.Delete periods of wet activity that are too short to be compared with other wet periods.
                        dive.thr = 7,    # (meters) threshold depth below which an underwater phase should be considered a dive.
                        zoc.method ="filter",  # see Luque and Fried (2011)
                        k = c(12, 240),  # (60 and 1200 minutes) Vector of moving window width integers to be applied sequentially.
                        probs = c(0.5, 0.05),   # Vector of quantiles to extract at each step indicated by k (so it must be as long as k)
                        depth.bounds = c(-5, 15),  # minimum and maximum depth to bound the search for the surface.
                        na.rm = TRUE)

stats<-diveStats(dcalib2)

filter(stats, begasc < begdesc)

plotTDR(dcalib2, diveNo=445

Edit changing to smooth.spline appears to help with descent phase detection, however as this is for a loggerhead turtle I'm not sure if this is correct to do for all dives?

On a side note is there a way to interpolate the time the animal actually goes below a desired threshold and use this as the start of ascent time? You can see from the profile they start descending before the descent identification at ~66m, due to the low sampling frequency of 5m. Could I somehow estimate the time the turtle went below e.g. 7m using the getDiveDeriv() ?

spluque / diveMove

Dive statistics incorrect? #7

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