S-MODE Shipboard uCTD and EcoCTD Measurements Version 1

This dataset contains shipboard Underway conductivity, temperature, and depth (UCDT) measurements taken during the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE) field campaign. The experiment was conducted approximately 300 km offshore of San Francisco, during a pilot campaign that spanned two weeks in October 2021, and two intensive operating periods in Fall 2022 and Spring 2023. S-MODE aims to understand how ocean dynamics acting on short spatial scales influence the vertical exchange of physical and biological variables in the ocean. The Underway CTD system contains a standard UCDT probe measuring conductivity, temperature, and pressure, as well as an augmented EcoCDT probe that concurrently measures both hydrographic and bio-optical data including conductivity, temperature, pressure, dissolved oxygen concentration, chlorophyll-fluorescence, and particulate backscatter at two different wavelengths. The level 2 data herein combines measurements from both the UCDT and EcoCDT into a single dataset, where for each variable, all profiles are binned onto a 5m vertical grid and merged into a 2-D matrix. Additional computed variables include backscatter baseline signal and backscatter spike signal. Data are available in netCDF format.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	June 23, 2026, 02:07 (UTC)
Created	April 1, 2025, 18:36 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	39334160-f632-41e8-abec-fa77ea1d7a27
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	10.5067/SMODE-RVECT
license	https://www.usa.gov/government-works
modified	2026-06-15T22:16:02Z
programCode	{026:000}
publisher	NASA/JPL/PODAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	ec0255a7262815529fee9f23c74b4d6cc483a736843097cc013b23e7577e2254
source_schema_version	1.1
spatial	["CARTESIAN", [{"NorthBoundingCoordinate": 38.1, "WestBoundingCoordinate": -125.4, "EastBoundingCoordinate": -122.9, "SouthBoundingCoordinate": 36.3}]]
temporal	2021-08-01/2023-05-31
theme	{"Earth Science"}