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Description

The primary sensor aboard the PACE spacecraft is the Ocean Color Instrument (OCI). It is a highly advanced optical spectrometer that will be used to measure properties of light over portions of the electromagnetic spectrum. It will enable continuous measurement of light at finer wavelength resolution than previous NASA satellite sensors, extending key system ocean color data records for climate studies. The Ocean Biology DAAC produces near real-time (quicklook) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Quicklook products provide a snapshot of the data during a short time period within a single orbit.

Version Description

Reprocessing of Ocean Color (OC) Datasets

Product Summary

Platforms
PACE
Instruments
OCI
Spatial Extent

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

Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2024-03-05 to Present
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
C3620139833-OB_CLOUD
Data State
ACTIVE
Number of Files/Granules
23455
Processing Level
2
Published
Updated
Science Keywords
Vegetation Index

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/car Carotenoid Content Index N/A float32 -32767 -100 to 100 N/A
geophysical_data/cci Chlorophyll-Carotenoid Index N/A float32 -32767 -100 to 100 N/A
geophysical_data/cire Chlorophyll Index Red Edge N/A float32 -32767 -100 to 100 N/A
geophysical_data/evi Enhanced Vegetation Index N/A float32 -32767 -1000 to 1000 N/A
geophysical_data/l2_flags Level-2 Processing Flags N/A int32 N/A -2147483648 to 2147483647 N/A
geophysical_data/mari Anthocyanin Reflectance Index N/A float32 -32767 -100 to 100 N/A
geophysical_data/ndii Normalized Difference Infrared Index N/A float32 -32767 -100 to 100 N/A
geophysical_data/ndsi Normalized Difference Snow Index N/A float32 -32767 -100 to 100 N/A
geophysical_data/ndvi Normalized Difference Vegetation Index N/A float32 -32767 -1000 to 1000 N/A
geophysical_data/ndwi Normalized Difference Water Index N/A float32 -32767 -100 to 100 N/A
geophysical_data/pri Photochemical Reflectance Index N/A float32 -32767 -100 to 100 N/A
navigation_data/latitude Latitude degrees_north float32 -999 -90 to 90 N/A
navigation_data/longitude Longitude degrees_east float32 -999 -180 to 180 N/A
navigation_data/tilt Sensor tilt angle degree float32 -32767 -25 to 25 N/A
scan_line_attributes/clat Center Latitude degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/clon Center Longitude degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/csol_z Center Solar Zenith Angle degree float32 -999 -90 to 90 N/A
scan_line_attributes/day Scan day of year days int32 -32767 0 to 366 N/A
scan_line_attributes/detnum Detector Number (zero-based) N/A int8 -1 0 to 25 N/A
scan_line_attributes/elat Ending Latitude degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/elon Ending Longitude degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/msec Scan time, milliseconds of day milliseconds int32 -32767 0 to 86400000 N/A
scan_line_attributes/mside Mirror Side (zero-based) N/A int8 -1 0 to 1 N/A
scan_line_attributes/slat Starting Latitude degrees_north float32 -999 -90 to 90 N/A
scan_line_attributes/slon Starting Longitude degrees_east float32 -999 -180 to 180 N/A
scan_line_attributes/time scan line time in seconds since 1970-1-1 seconds since 1970-1-1 float64 -32767 N/A N/A
scan_line_attributes/year Scan year years int32 -32767 1900 to 2100 N/A
sensor_band_parameters/aw Band-pass averaged absorption coefficient for seawater m^-1 float32 -32767 9.9999997473788E-5 to 5 N/A
sensor_band_parameters/bbw Band-pass averaged backscattering coefficient for seawater m^-1 float32 -32767 4.9999998736894E-6 to 1 N/A
sensor_band_parameters/F0 Mean Solar Flux W m^-2 um^-1 float32 -32767 0 to 2500 N/A
sensor_band_parameters/k_no2 NO2 Absorption cross-sections cm^2 molecule^-1 float32 -32767 0 to 0.10000000149012 N/A
sensor_band_parameters/k_oz Ozone Absorption cross-sections cm^-1 float32 -32767 0 to 0.10000000149012 N/A
sensor_band_parameters/Tau_r Rayleigh Optical Thickness N/A float32 -32767 0 to 0.5 N/A
sensor_band_parameters/vcal_gain Vicarious Calibration Gain N/A float32 -32767 0 to 2 N/A
sensor_band_parameters/vcal_offset Vicarious Calibration Offset mW cm^-2 um^-1 sr^-1 float32 -32767 0 to 10 N/A
sensor_band_parameters/wavelength wavelengths nm int32 -32767 0 to 20000 N/A
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