UC Berkeley CYGNSS Level 3 Monthly RWAWC Watermask Version 3.1

The CYGNSS Level 3 UC Berkeley Watermask Record Version 3.1 was developed by CYGNSS investigators in the Department of Civil and Environmental Engineering at the University of California, Berkeley. CYGNSS was launched on 15 December 2016, it is a NASA Earth System Science Pathfinder Mission that was launched with the purpose of collecting the first frequent space‐based measurements of surface wind speeds in the inner core of tropical cyclones. Originally made up of a constellation of eight micro-satellites, the observatories provide nearly gap-free Earth coverage using an orbital inclination of approximately 35° from the equator, with a mean (i.e., average) revisit time of seven hours and a median revisit time of three hours.

This dataset is derived from version 3.1 of the CYGNSS L1 SDR dataset (https://doi.org/10.5067/CYGNS-L1X31), and provides monthly binary inland surface water classification data at a 0.01-degree (~1x1 kilometer) resolution with a 1-month latency. This product, known as the UC Berkeley Random Walk Algorithm WaterMask from CYGNSS (Berkeley-RWAWC), generates water classification for a given location based on CYGNSS observations combined with a random walker algorithm. The watermask variable includes binary values indicating land (0), surface water (1), and no data/ocean (-99). The data product is archived in monthly files in netCDF-4 format and covers the period from August 2018 to present.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	September 15, 2026, 04:55 (UTC)
Created	April 1, 2025, 19:44 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	0d1f7072-0a10-4903-aa2d-f1c26d59e8bc
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	10.5067/CYGNS-L3W31
license	https://www.usa.gov/government-works
modified	2026-09-07T22:16:03Z
programCode	{026:000}
publisher	NASA/ESSP/UMICH/CYGNSS;NASA/JPL/PODAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	29c4f1f0f0221bfdb33b91f11500b8156c64a4bcd651b64a5062d6f6397db327
source_schema_version	1.1
spatial	["CARTESIAN", [{"NorthBoundingCoordinate": 37.4, "WestBoundingCoordinate": -180.0, "EastBoundingCoordinate": 180.0, "SouthBoundingCoordinate": -37.4}]]
theme	{"Earth Science"}