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Description

This dataset contains shipboard radiometer measurements taken during the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE) pilot campaign conducted approximately 300 km offshore of San Francisco over two weeks in October 2021. 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. Air-Sea Interaction METeorology (ASIMET) sensors mounted onboard the R/V Oceanus record shortwave and longwave radiation fluxes. These are used by S-MODE to compare with DopplerScatt retrievals. Data are available in netCDF format.

Product Summary

Platforms
Ships
Instruments
RADIOMETERS
Spatial Extent

N: 38.1 S: 36.3 E: -122.9 W: -125.4

Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2021-08-01
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2832306976-POCLOUD
Data State
COMPLETE
Number of Files/Granules
2
Processing Level
2
Science Keywords
DOWNWELLING SHORTWAVE RADIATION ,
DOWNWELLING LONGWAVE RADIATION

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

S-MODE. (2022). S-MODE Shipboard Radiometer Measurements Version 1 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SMODE-RVRAD Date Accessed: 2025-12-14

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
air_temperature ASIMET Relative Humidity & Air Temperature Module SN#269 degrees_C double -9999 0 to 40 1
atmospheric_pressure ASIMET Barometric Pressure Module SN#210 millibars double -9999 950 to 1050 1
latitude Bold Horizon GNSS latitude with gaps filled in using Carthe Drifters mounted on ships deck degrees_north double N/A N/A 1
longitude Bold Horizon GNSS longitude with gaps filled in using Carthe Drifters mounted on ships deck degrees_east double N/A N/A 1
longwave_flux ASIMET Longwave Radiation Module SN#261 W m-2 double -9999 200 to 600 1
relative_humidity ASIMET Relative Humidity & Air Temperature Module SN#269 percent double -9999 0 to 100 1
ship_heading Bold Horizon heading computed from ships GNSS degrees double -9999 0 to 360 1
ship_velocity_east R/V Bold Horizon eastward velocity computed from shipboard GNSS m s-1 double -9999 -20 to 20 1
ship_velocity_north R/V Bold Horizon northward velocity computed from shipboard GNSS m s-1 double -9999 -20 to 20 1
shortwave_flux ASIMET Shortwave Radiation Module SN#503 W m-2 double -9999 0 to 1400 1
time Time internally recorded by ASIMET sensors days since 1950-01-01T00:00:00Z double N/A N/A 1
wind_compass ASIMET Propeller and Vane Wind Module SN#239. degrees double -9999 0 to 360 1
wind_east ASIMET Propeller and Vane Wind Module SN#239. Magnetic correction has been applied. m s-1 double -9999 -20 to 20 1
wind_north ASIMET Propeller and Vane Wind Module SN#239. Magnetic correction has been applied. m s-1 double -9999 -20 to 20 1
wind_vane ASIMET Propeller and Vane Wind Module SN#239. degrees double -9999 0 to 360 1
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