The merits of 'TIMESAT' and 'phenopix' are adopted. Besides, a simple and
growing season dividing method and a practical snow elimination method
based on Whittaker were proposed. 7 curve fitting methods and 4 phenology
extraction methods were provided. Parameters boundary are considered for
every curve fitting methods according to their ecological meaning.
And 'optimx' is used to select best optimization method for different
curve fitting methods.
Reference:
Dongdong Kong, R package: A state-of-the-art Vegetation Phenology extraction package,
phenofit version 0.2.3, < https://github.com/kongdd/phenofit>;
Zhang, Q., Kong, D., Shi, P., Singh, V.P., Sun, P., 2018. Vegetation phenology
on the Qinghai-Tibetan Plateau and its response to climate change (1982–2013).
Agric. For. Meteorol. 248, 408–417.
Init_param
wHANT
, sgfitw
and whitsmw2
). And unified their weights updating
strategy.doubleLog.zhang
is still not as stable as others.wTSM_cpp
iter parameter is ignored now.check_season
online now.season
can export rough curve fitting result, even no peaks or trough found.nptperyear
and south
) into INPUT
. check_input
,
season
, season_mov
and curvefits
are impacted.adj.param
parameter to season
, which determine whether to automatically
adjust roughn curve fitting parameters.season_mov
for Whittaker's parameter lambda.check_fit
and upper envelope
in wWHIT
.v-curve
.shiny
app phenofit
released.QC_flag
to the output of check__input
.