Coastal Zone Color Scanner (CZCS) Data Access

Available as - [Outline] - [SGML]

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: National Aeronautics and Space Administration (NASA)
Publication_Date: On-line
Title: Coastal Zone Color Scanner (CZCS) Data Access
Geospatial_Data_Presentation_Form:
Remote-sensing images Delivery Format: On-line; Electronic or Media
Online_Linkage:
<http://daac.gsfc.nasa.gov/data/dataset/CZCS/index.html> <http://daac.gsfc.nasa.gov/CAMPAIGN_DOCS/OCDST/OB_Documentation.html>
Description:
Abstract:
"The CZCS data set is a global ocean color data set derived from satellite observations. In most oceanic regions, the color of the ocean is primarily determined by the abundance of phytoplankton and their associated photosynthetic pigments. As phytoplankton pigment concentration increases, ocean color gradually shifts from blue to green. NASA developed the CZCS to utilize this characteristic of ocean color for the observation of pigment distribution in the oceans. The CZCS was launched on the Nimbus-7 satellite in October 1978. During the 91 months [7 ½ years] of its operation (October 1978 - June 1986), CZCS acquired nearly 68,000 images, each covering up to 2 million square kilometers of ocean surface.

The five CZCS data products archived at the Goddard Space Flight Center Distributed Active Archive Center (Goddard DAAC) include: Level 1, Level 1a, Level 2, Level 3 PST (Postage Stamp) images, and Level 3 Composite images. Level 1 and 1a data contain calibrated radiances and earth location information for each CZCS scene (a maximum of 2 minutes of data). Level 1 data are at full Local Area Coverage (LAC) resolution (1 km) and level 1a data are subsampled (every 4th pixel, every 4th line) providing 4 km Global Area Coverage (GAC) resolution. Level 2 data were derived from the level 1a data, and contain six derived geophysical parameters for each CZCS scene. The level 3 PSTs are earth-gridded (binned) composites of the derived geophysical parameters, along with compositing statistics, at various temporal resolutions (daily, 5-day weekly, and monthly). They contain the sums of the values, the sums of the squares of the values, and the number of valid samples in each composite bin. The level 3 data are binned to a fixed, linear latitude-longitude (equal angle) grid of dimension 1024 (latitude) x 2048 (longitude) with ~18.5 km resolution at the equator. The level 3 Composites are the means of the level 3 PST products represented as 8-bit raster images."

-- From on-line CZCS Data Set Readme

Purpose:
"The purpose of the CZCS on Nimbus-7 was to obtain a better understanding of the temporal and spatial distribution of phytoplankton biomass and primary production, and a better understanding of the processes regulating the growth of phytoplankton and of the processes influencing the ultimate fate of this organically fixed carbon. Satellite observations of ocean color were necessary to provide reliable estimates of marine phytoplankton biomass on synoptic scales which are useful in studies of phytoplankton processes. The mission objectives for the CZCS were to obtain observations of ocean color and temperature, particularly in the coastal zones, which would provide data with sufficient spatial and spectral resolution for the following applications:

Measure concentrations of chlorophyll-a and phaeophytin. Map biologically productive areas. Map suspended sediment distribution and determine the type of materials suspended in the water. Map Gelbstoff (yellow substances) as an indicator of salinity. Detect pollutants in the upper level of the oceans. Map temperature of coastal waters and the open ocean. Study the interactions between coastal effluents and open waters." -- Taken from CZCS on-line data set guide document

Supplemental_Information:
Metadata Contact: Sara Breslow Location: Global, emphasis on coastal regions Date Explanation: When operating full time, about 400 images were collected each month. Spatial Resolution: 1x1 km; 4x4 km; 1024 lat x 2048 long grid Temporal Resolution: Daily; 5-day weekly; Monthly Access Notes: Level 1a GAC, level 2 GAC, and level 3 monthly composite data (in Hierarchical Data Format (HDF), are available by anonymous ftp from: <ftp://daac.gsfc.nasa.gov/data/czcs/>

In order to find CZCS level 1, level 1a, and level 2 data for a specified region, the tool to use is the CZCS data browser, accessible through the World Wide Web. To initiate a browse session, go the following URL: <http://daac.gsfc.nasa.gov/data/dataset/CZCS/index.html>

A telnet option for accessing data is also available. For more information on all of these options see the Data Set Readme at <http://daac.gsfc.nasa.gov/CAMPAIGN_DOCS/OCDST/czcs_readme.html#400>

Alternate contact e-mail: daacuso@daac.gsfc.nasa.gov

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19781100
Ending_Date: 19860600
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -180
East_Bounding_Coordinate: 180
North_Bounding_Coordinate: 90
South_Bounding_Coordinate: -90
Keywords:
Theme:
Theme_Keyword_Thesaurus: Oceanography
Theme_Keyword: Biological Oceanography
Theme_Keyword: Primary Producers
Theme_Keyword: Biomass
Theme:
Theme_Keyword_Thesaurus: Ecosystems
Theme_Keyword: Coasts
Theme_Keyword: Hydrology
Theme_Keyword: Productivity
Theme_Keyword: Oceanography
Theme_Keyword: Shelf
Theme_Keyword: Offshore
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Ocean Color
Theme_Keyword: Calibrated Radiances
Theme_Keyword: Pigment Concentrations
Theme_Keyword: Diffuse Attenuation Coefficient
Theme_Keyword: Normalized Water-leaving Radiance
Theme_Keyword: Aerisol Radiance
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Ocean Color
Theme_Keyword: Water Color
Theme_Keyword: CZCS
Theme_Keyword: Chlorophyll
Theme_Keyword: Phytoplankton
Theme_Keyword: Photosynthetic Pigments
Theme_Keyword: Plankton
Theme_Keyword: Primary Productivity
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Global
Place_Keyword: Coastal Regions
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: James G. Acker
Contact_Position: OCDST Lead
Contact_Address:
Address:
User Services Office NASA Goddard Space Flight Center, Code 902
City: Greenbelt
State_or_Province: Maryland
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: (301) 614-5435 or 1-800-257-6151
Contact_Facsimile_Telephone: (301) 614-5268
Contact_Electronic_Mail_Address:
ocean@daac.gsfc.nasa.gov Web Address: <http://daac.gsfc.nasa.gov>

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: James G. Acker
Contact_Position: OCDST Lead
Contact_Address:
Address:
User Services Office NASA Goddard Space Flight Center, Code 902
City: Greenbelt
State_or_Province: Maryland
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: (301) 614-5435 or 1-800-257-6151
Contact_Facsimile_Telephone: (301) 614-5268
Contact_Electronic_Mail_Address:
ocean@daac.gsfc.nasa.gov Web Address: <http://daac.gsfc.nasa.gov>
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1894

Metadata_Reference_Information:
Metadata_Date: 19990601
Metadata_Review_Date:
Metadata_Future_Review_Date:

Generated by mp version 2.4.10 on Thu Sep 28 12:45:56 2000