Dendrometer band meta data

The file NSF_Dendro_time_series.Rdata contains a single R object, Time.series. This object is of class list and contains 1755 elements. Each element is a dataframe of a single annual time series of bole growth for an individual tree.

The dataframe has 18 variables and as many rows as there were dendrometer band gap measurements for that tree in that year.

> head(Time.series[[1]], 2)
     SITE YEAR TREE_ID BAND_NUM   SP UNIQUE_ID DATA_SET ORG_DBH GAP_WIDTH      DBH
5227   HF 2018   80271        1 FAGR   80271-1      NSF    18.6      7.25 20.69836
5228   HF 2018   80271        1 FAGR   80271-1      NSF    18.6      7.69 20.71236
     DOY SKIP ADJUST REMOVE NEW_BAND DBH_TRUE   resids.vec std.resids
5227  86    0      0      0        0 18.69840 -0.007794043  -1.986681
5228  99    0      0      0        0 18.71241  0.005331710   1.325242

Variable	Explanation
SITE	Location of the tree; HF or SERC
YEAR	Year of the time series
TREE_ID	Tag number used to identify the tree
BAND_NUM	Identifier of the dendrometer band; 1 = first band installed, 2 = second band installed, etc.
UNIQUE_ID	Combination of the SITE, TREE_ID, and BAND_NUM
DATA_SET	Project the data was collected for originally
ORG_DBH	The first diameter (at breast height [DBH]) of the tree in cm
GAP_WIDTH	The measurement of the dendrometer band in mm
DBH	Calculated DBH from GAP_WIDTH AND ORG_DBH
DOY	day of year the measurement was recorded
SKIP	Flag to skip band
ADJUST	Flag that band has been adjusted (a sustained change in gap size)
REMOVE	Outlier or erroneous measurement (remove one observation)
NEW_BAND	1 or 0; 1 for a newly installed band
DBH_TRUE	Calculated DBH from origin, gap width, and correction for chord vs. arc
resids.vec	Vector of residuals around fitted function
std.resids	Standardized residuals (for comparisons across different growth amounts)