solar_trough {GenEst} | R Documentation |
Trough-based solar thermal power simulated example
Description
An example data set for estimating fatalities from a trough-based solar thermal electric power generation facility. The simulated site is inspected daily along ten 2000 meter long transects, which run north-south. Observers look up to 150 meters away down the rows created by troughs (east-west). One sided distance sampling will be used, with observers looking consistently in one cardinal direction as they travel through the facility. A sitewide clearout search is implemented before the first scheduled winter search.
The dataset consists of five parts: Data on carcass observations (CO) from daily searches, field trials for estimating carcass persistence (CP) and searcher efficiency (SE), search schedule (SS), and density weighted proportion (DWP) of area searched for the rows within each transect (which is an area adjustment factor to account for incomplete search coverage).
Usage
solar_trough
Format
solar_trough
is a list with 5 elements:
SE
Searcher efficiency trial data
CP
Carcass persistence trial data
SS
Search schedule parameters
DWP
Density weighted proportion of area searched
CO
Carcass observations
Searcher Efficiency (SE
)
$SE
is a data frame with each row representing the fate of a single
carcass in the searcher efficiency trials. There are columns for:
Season
"winter"
,"spring"
,"summer"
, or"fall"
Size
"bat"
; or"lrg"
,"med"
, or"sml"
bird"Search1",...,"Search5"
fate of carcass on the 1st, 2nd, 3rd, 4th, and 5th search after placement. A value of 1 implies that a carcass was discovered by searchers, 0 implies the carcass was present but not discovered, and any other value is interpreted as "no search" or "carcass not present" and ignored in the model. In this data set,
NA
indicates that a carcass had been previously discovered and removed from the field. A user may use a variety of values to differentiate different reasons no search was conducted or the carcass was not present. For example, "NS" to indicate the search was not scheduled in that location at that time, or "SC" to indicate the carcass had been removed by scavengers prior to the search.Distance
the distance a carcass was placed from the observer's transect.
Carcass Persistence (CP
)
$CP
is a data frame with each row representing the fate of a single
carcass in the carcass persistence trials. There are columns for:
Index
unique ID for each carcass
Season
"winter"
,"spring"
,"summer"
, or"fall"
Size
"bat"
; or"lrg"
,"med"
, or"sml"
birdLastPresent
,FirstAbsent
endpoints of the interval bracketing the time the carcass was scavenged or otherwise removed from the field. For example,
LastPresent = 2.04
,FirstAbsent = 3.21
indicates that the carcass was last observed 2.04 days after being placed in the field and was noted missing 3.21 days after being placed. If the precise time of carcass removal is known (e.g., recorded by camera), thenLastPresent
andFirstAbsent
should be set equal to each other. If a carcass persists beyond the last day of the field trial,LastPresent
is the last time it was observed andFirstAbsent
is entered asInf
orNA
.
Search Schedule (SS
)
$SS
is a data frame with a row for each date a transect at the site
was searched, a column of SearchDate
s, and a column for each
transect. In addition, there is an optional column to indicate the
Season
. The columns for distinct area (array) and the date column
are required, and the names of the columns for search areas must match the
names of areas used in the DWP and CO files.
SearchDate
columns of dates when a transect was searched. Format in this data is
"%Y-%m-%d CDT"
, but time zone (CDT
) is optional. A time stamp may be included if desired (e.g.,2018-03-20 02:15:41
). Alternatively,\
can be used in place of-
.Season
"winter"
,"spring"
,"summer"
, or"fall"
to indicate which season the search was conducted in.Season
is optional but may be used as a temporal covariate for fatality estimates.
Density Weighted Proportion (DWP
)
$DWP
is a data frame with a row for each transect and columns for
each carcass size class (labels must match those of the class factors in the
carcass observation file). Values represent the density-weighted proportion
of the searched area for each size (or the fractionof carcasses that fall
in the searched area). Since the whole site was searched, DWP is uniformly
set equal to 1.
Unit
unique ID for each transect. IDs match those used in the
$CO
data frame and the column names in the$SS
data.bat
DWP associated with size class Bat
sml
DWP associated with size class Small
med
DWP associated with size class Medium
lrg
DWP associated with size class Large
Carcass Observations (CO
)
$CO
is a data frame with a row for carcass observed in the carcass
searches and a number of columns giving information about the given carcass
(date found, size, species, etc.)
Index
unique identifier for each carcass.
Unit
identifier for which transect the given carcass was found at. Values must match with DWP Transect values Search Schedule column names.
Species
species of the carcass:
"BA"
,"BB"
,"BC"
,"BD"
,"BE"
,"LA"
,"LB"
,"LD"
,"LE"
,"MA"
,"MB"
,"SA"
,"SB"
,"SC"
,"SD"
,"SE"
,"SF"
,"SG"
Size
size:
"bat"
,"lrg"
,"med"
,"sml"
Row
Optional indicator of which row within an array a carcass was found at.
Distance
The perpendicular distance from the searcher's transect at which the carcass was discovered at.
DateFound
dates entered in the same format as in
$SS$SearchDate
. Every date entered here is (and must be) included in the search schedule ($SS$SearchDate
)X
UTM Easting of carcass.
Y
UTM Northing of carcass.
Source
solar_trough