Time-series measurements of oceanographic data collected in the nearshore zone offshore of Marconi Beach, Wellfleet, MA, December 9, 2024 to March 10, 2025

A nanopod mounted with a Nortek Signature, a Seabird Microcat, a Seabird Seagauge, an EofE EchoLogger, and Edgetech releases was loaded onto the R/V Tioga in Woods Hole, MA. The ship sailed to Marconi Beach, MA. The nanopod was lowered into the water and the latitude and longitude were recorded. The releases were pinged and a signal was received back indicating the nanopod was upright. Olivia De Meo is the contact for this process step and all subsequent process steps.

The R/V Tioga sailed from Woods Hole, MA to Marconi Beach, MA. The releases were pinged and a signal was received back indicating the nanopod was upright. The release command was initiated and the nanopod was hooked and raised onto the deck. All instruments were clean and free of biofouling. All data were downloaded from the instruments using the manufacturer's software.

The raw data files from each sensor were processed and converted to netCDF using the stglib Python library, a package of code to process data consistent with procedures of the USGS Coastal/Marine Hazards and Resources Program; see "history" global attribute in each processed netCDF file for stglib and python versions used. In stglib, attributes conforming to Climate and Forecast (CF) Conventions were added; see "Conventions" global attribute in processed netCDF files for CF version used. All times are in Coordinated Universal Time (UTC). For all pressure sensors, corrected pressure data (P_1ac) were calculated by finding an offset with local atmospheric pressure readings when the pressure sensor was reading in air just prior to deployment. Pressure data were corrected using the offset and a time-series of local atmospheric pressure over the course of the deployment to remove the atmospheric contribution to the deployed pressure data. The resulting corrected pressure variable is the pressure due to seawater (standard_name "sea_water_pressure_due_to_seawater" in netCDF files). Data quality assurance and quality control (QAQC) was performed by inspecting all variables and replacing spurious values with the fill value. Details of which portions of data were flagged and replaced are available in the metadata in each netCDF file and information about the individual QAQC trimming functions are available in the stglib documentation (https://stglib.readthedocs.io/en/latest/) in the "Instrument configuration file" section. The root of the netCDF files are named using the convention ####XZZZ where '####' is the mooring number, 'X' is the position on the mooring of the sensor with 1 being closest to the surface, and 'ZZZ' (length between 2 and 5 characters) is an abbreviation for the instrument that was deployed; see instrument abbreviations table in stglib documentation https://cmgp.code-pages.usgs.gov/stglib/insttbl.html. After instrument abbreviation there are additional processed file suffixes that identify the type and level of processing; '-a' is Best Basic Version (BBV = highest level of processing), 'b' is burst or continuous fast sample rate data, 's' is wave statistics from built-in stglib, 's_diwasp' is wave statistics from pyDIWASP library, and 't' is tide data. For example, in the file 11753mc-a.nc, '1175' is the mooring number, '3' is the position of the sensor on the mooring, and 'mc' refers to the Seabird MicroCAT sensor, and '-a' indicates it is BBV.

Metadata was modified to fix a typo in the browse graphic link. (20260109)