Project SAIL aimed to improve the scientific understanding of the marine boundary layer by means of a unique monitoring campaign on board the iconic Portuguese tall ship NRP Sagres during its 2020 circumnavigation expedition. This dataset comprises the pre-processed atmospheric measurements from the SAIL campaign. It is derived from the raw measurements (https://doi.org/10.25747/b2ff-kg31) by applying preliminary quality-control and pre-processing procedures. 

The jupyter notebooks documenting the pre-processing of the data are publicly available on Zenodo's Project SAIL community (https://zenodo.org/communities/sail). 

Detailed information  on the pre-processing procedures can be found in the project's data management plan (DOI: https://doi.org/10.5281/zenodo.4286209).

This dataset currently includes the resources detailed below. Additional resources will be added as they become available.
          

* ATMOSPHERIC ELECTRIC FIELD

The resource SAIL_PD_E1.txt contains the pre-processed data from the primary atmospheric electric field measurements in the upper mast (E1), with the following structure:

col 1: date (yyyy-mm-dd)
col 2: time (HH:MM)
col 3: potential gradient  (V/m)
col 4: standard deviation (V/m)
col 5: longitude (degrees E)
col 6: latitude (degrees N)

The resource SAIL_PD_E2.txt contains the pre-processed data from the secondary atmospheric electric field measurements in the lower mast (E2), and has the following structure:

col 1: date (yyyy-mm-dd)
col 2: time (HH:MM)
col 3: potential gradient  (V/m)
col 4: standard deviation (V/m)
col 5: longitude (degrees E)
col 6: latitude (degrees N)

The jupyter notebooks implementing the pre-processing and quality control procedures for the electric field observations are available on  Zenodo's Project SAIL community (https://zenodo.org/doi/10.5281/zenodo.10125809).


* GAMMA RADIATION

The resource SAIL_PD_GA.txt contains the pre-processed gamma radiation observations, and has the following structure:

col 1: date (yyyy-mm-dd)
col 2: time (HH:MM)
col 3: gamma counts (counts/minute)
col 4: standard deviation (counts/minute)
col 4: longitude (degrees E)
col 5: latitude (degrees N)

The jupyter notebook implementing the pre-processing and quality control procedures for the gamma radiation observations are available on  Zenodo's Project SAIL community (https://zenodo.org/doi/10.5281/zenodo.10134221). 

Note: This resource is source of DOI: 10.6084/m9.figshare.20393931.v1


* VISIBILITY
 
The resource SAIL_PD_VI.txt contains the pre-processed visibility observations, and has the following structure:

col 1: date (yyyy-mm-dd)
col 2: time (HH:MM)
col 3: meteorological optical range (m)
col 4: longitude (degrees E)
col 5: latitude (degrees N)

The jupyter notebook implementing the pre-processing and quality control procedures for the visibility observations are available on  Zenodo's Project SAIL community (https://zenodo.org/doi/10.5281/zenodo.10137011).
 

Note: This resource is available on https://doi.org/10.6084/m9.figshare.19692394.v2
 

* SOLAR RADIATION        

The resources SAIL_PD_inSL.txt and SAIL_PD_outSL.txt contain the pre-processed observations of incoming and outgoing solar radiation observations, respectively, with the following structure:

col 1: date (yyyy-mm-dd)
col 2: time (HH:MM)
col 3: shortwave (incoming/outgoing) graduation (W/m2)
col 4: longitude (degrees E)
col 5: latitude (degrees N)

The jupyter notebook implementing the pre-processing and quality control procedures for the solar radiation observations are available on  Zenodo's Project SAIL community (https://zenodo.org/doi/10.5281/zenodo.10161090).