The Sequoia LISST records transmission, pressure, temperature along with light intensity parameters that can be used to compute % optical transmission.
http://www.sequoiasci.com/products/fam_LISST_100.aspx
Data can be downloaded from the Download Data page as comma separated variable text files or MATLAB .mat files. These data products are presented in a cleaned up raw format i.e. instrument commands and bad data values are removed and data gaps are filled with evenly spaced NaN’s. Data from the LISST are collected in “bursts” – every 600s, 40 elements are collected (elements are ms apart).
Example of data from a comma separated variable text file:
Example of data from a MATLAB .mat file (structure lisstdata with some elements expanded):
LISST data are recorded in ‘Raw Data Storage Format’ (see page 55 of the LISST 100x user’s guide http://www.sequoiasci.com/products/fam_LISST_100.aspx). Here is a table for decoding the data from the user’s guide:
| Elements | Parameter |
|---|---|
| 1:32 | Light intensity on detectors 1 through 32 |
| 33 | Laser transmission sensor |
| 34 | Battery voltage in raw counts |
| 35 | External Auxiliary input 1 (0 to 5V = 0 to 4096) |
| 36 | Laser reference sensor |
| 37 | Pressure in raw counts |
| 38 | Temperature in units of 100ths of degrees C |
| 39 | (Day*100 + Hour) at which data taken |
| 40 | (Minutes*100 + Seconds) at which data taken |
