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Description

The Hawkeye instrument, flown onboard the SeaHawk CubeSat, was optimized to provide high quality, high resolution imagery (120 meter) of the open ocean, coastal zones, lakes, estuaries and land features. This ability provides a valuable complement to the lower resolution measurements from previous missions like SeaWiFS, MODIS and VIIRS. The SeaHawk CubeSat mission is a partnership between NASA and the University of North Carolina, Wilmington (UNCW), Cloudland Instruments and AAC-Clyde Space and is funded by the Moore Foundation under a grant for the Sustained Ocean Color Observations with Nanosatellites (SOCON).

Version Description

Reprocessing of Ocean Color (OC) Datasets

Product Summary

Platforms
SeaHawk-1
Instruments
HawkEye
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2019-03-21 to 2023-10-27
Data Partner
Ocean Biology Processing Group (OBPG) ,
Ocean Biology Distributed Active Archive Center (OB.DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/GCDC/OB.DAAC)
Concept ID
C3160685780-OB_CLOUD
Data State
COMPLETE
Number of Files/Granules
7728
Processing Level
2
Published
Updated
Science Keywords
Ocean Color ,
Reflectance ,
Aerosol Optical Depth/Thickness ,
Angstrom Exponent ,
Chlorophyll Concentration ,
Attenuation/Transmission ,
Organic Carbon ,
Fluorescence ,
Photosynthetically Active 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

NASA Ocean Biology Processing Group. (2024). SeaHawk-1 HawkEye Level-2 Regional Ocean Color (OC) Data, version 2022.0 [Data set]. NASA Ocean Biology Distributed Active Archive Center. https://doi.org/10.5067/SEAHAWK-1/HAWKEYE/L2/OC/2022.0 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
geophysical_data/angstrom geophysical_data/angstrom N/A int16 -32767 -30000 to 5000 9.9999997473788E-5
geophysical_data/aot_867 geophysical_data/aot_867 N/A int16 -32767 0 to 30000 9.9999997473788E-5
geophysical_data/chlor_a geophysical_data/chlor_a mg m^-3 float32 -32767 0.0010000000474975 to 100 N/A
geophysical_data/Kd_490 geophysical_data/Kd_490 m^-1 int16 -32767 50 to 30000 0.00019999999494758
geophysical_data/l2_flags geophysical_data/l2_flags N/A int32 N/A -2147483648 to 2147483647 N/A
geophysical_data/pic geophysical_data/pic mol m^-3 int16 -32767 -32500 to 30000 1.9999999949505E-6
geophysical_data/poc geophysical_data/poc mg m^-3 int16 -32767 -32000 to -27000 0.20000000298023
geophysical_data/Rrs_412 geophysical_data/Rrs_412 sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_447 geophysical_data/Rrs_447 sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_488 geophysical_data/Rrs_488 sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_510 geophysical_data/Rrs_510 sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_556 geophysical_data/Rrs_556 sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
geophysical_data/Rrs_670 geophysical_data/Rrs_670 sr^-1 int16 -32767 -30000 to 25000 1.9999999949505E-6
navigation_data/cntl_pt_cols navigation_data/cntl_pt_cols N/A int32 -32767 0 to 10000 N/A
navigation_data/cntl_pt_rows navigation_data/cntl_pt_rows N/A int32 -32767 0 to 10000 N/A
navigation_data/latitude navigation_data/latitude degrees_north float32 -999 -90 to 90 N/A
navigation_data/longitude navigation_data/longitude degrees_east float32 -999 -180 to 180 N/A
navigation_data/tilt navigation_data/tilt degree float32 -32767 -25 to 25 N/A
scan_line_attributes/clat scan_line_attributes/clat degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/clon scan_line_attributes/clon degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/csol_z scan_line_attributes/csol_z degree float32 -999 -90 to 90 N/A
scan_line_attributes/day scan_line_attributes/day days int32 -32767 0 to 366 N/A
scan_line_attributes/detnum scan_line_attributes/detnum N/A int8 -1 0 to 25 N/A
scan_line_attributes/elat scan_line_attributes/elat degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/elon scan_line_attributes/elon degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/msec scan_line_attributes/msec milliseconds int32 -32767 0 to 86400000 N/A
scan_line_attributes/mside scan_line_attributes/mside N/A int8 -1 0 to 1 N/A
scan_line_attributes/slat scan_line_attributes/slat degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/slon scan_line_attributes/slon degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/year scan_line_attributes/year years int32 -32767 1900 to 2100 N/A
sensor_band_parameters/aw sensor_band_parameters/aw m^-1 float32 -32767 9.9999997473788E-5 to 5 N/A
sensor_band_parameters/bbw sensor_band_parameters/bbw m^-1 float32 -32767 4.9999998736894E-6 to 1 N/A
sensor_band_parameters/F0 sensor_band_parameters/F0 W m^-2 um^-1 float32 -32767 0 to 250 N/A
sensor_band_parameters/k_no2 sensor_band_parameters/k_no2 cm^2 molecule^-1 float32 -32767 0 to 0.10000000149012 N/A
sensor_band_parameters/k_oz sensor_band_parameters/k_oz cm^-1 float32 -32767 0 to 0.10000000149012 N/A
sensor_band_parameters/Tau_r sensor_band_parameters/Tau_r N/A float32 -32767 0 to 0.5 N/A
sensor_band_parameters/vcal_gain sensor_band_parameters/vcal_gain N/A float32 -32767 0 to 2 N/A
sensor_band_parameters/vcal_offset sensor_band_parameters/vcal_offset mW cm^-2 um^-1 sr^-1 float32 -32767 0 to 10 N/A
sensor_band_parameters/wavelength sensor_band_parameters/wavelength nm int32 -32767 0 to 20000 N/A
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