New updates improve automatic delta-T-max "baseline" point selection:
New option in initial configuration window allows user to define threshold for stable nighttime delta-T conditions. This approach is based on Oishi et al., AgForMet 2008 (doi:10.1016/j.agrformet.2008.06.013). Default threshold value is 0.005 (or 0.5%), but should be evaluated by individual users based on their own data. Nighttime stability is determined using the following function:
S = N / V
where S is stability, N is the standard deviation of nighttime delta-T values within the user-defined time range (this is the same time range for stable nighttime VPD conditions, default is 2-hours), and V is diurnal variability of delta-T for a 7-day moving window centered on a given night where
V = mean (P(i) - L(i))
and
P(i) is the peak value of delta-T for day i, defined by the upper quartile of nightime values L(i) is the low value of delta-T for day i, defined by the lower quartile of daytime values.
This quartile approach is used rather than the absolute maximum or minimum to avoid influence of data spikes.
New automatic delta-T-max point selection will pick the peak nighttime value where VPD and delta-T stability are below user-defined threshold values. Previous approach selected the final value (i.e., last point in time) meeting these conditions, rather than the peak.
Some changes to plot symbol shapes and colors in the graphical user interface (stable nighttime delta-T and low nighttime VPD).
Baseliner_4.21runtime.exe: You can download and run this installer without needing an separate download of the Runtime program
Updated version of the stand-alone Windows application. Analogous to the MATLAB-based Baseliner_4_02 version (released 2020.07.07) https://github.com/Coweeta/baseliner4 Version compiled using MATLAB R2021a on a Windows10 machine.
Download and run either Baseliner_4.21.exe or MyAppInstaller_web.exe
Each file will run an installer program (that will also prompt you to download the MATLAB Runtime program).
Thanks to Chainey Boroski at Duke University for compiling the current version!
please contact Chris Oishi with questions or feedback: andrew.c.oishi@usda.gov
Functionally identical to previous version, but now will correct for common time-step errors, including missing or duplicate time-steps and midnight time/day errors (if midnight is recorded as 00:00 it should be the first time step of a day, else if 24:00 it should be the last time-step of the day). Version compiled using MATLAB R2018b, so may require more recent version of MATLAB Runtime (see below), or may work as stand alone applicaiton.
please contact Chris Oishi with questions or feedback: andrew.c.oishi@usda.gov
Please use the following reference when citing this software: Oishi, A.C., Hawthorne, D., and Oren, R. Baseliner: An open-source, interactive tool for processing sap flux data from thermal dissipation probes. Software-X. 5: 139-143. DOI: 10.1016/j.softx.2016.07.003.
MATLAB source code available at https://github.com/Coweeta/baseliner4
Stand-alone executable program for Windows (no MATLAB required)
From the Baseliner4_exe folder in github, you have two options to install the software on your computer.
Option 1) Download and run the MyAppInstaller_web.exe file. It will guide you through the installation process, which will include downloading and installing MATLAB Runtime. This option downloads components from the web and may be slow, depending on your computer's connectivity.
Option 2) First go to http://www.mathworks.com/products/compiler/mcr/index.html and install MATLAB Runtime R2015b. Then download and run Baseliner.exe file.
Sample data have also been provided to test out the program.