Coastal Zone Color Scanner (CZCS) Level 1Entry ID: NIMBUS.CZCS1
Abstract: 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
- 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 Gelbstoffe (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.
Level 1 Data contain at-spacecraft raw radiance
counts with calibration and earth location information
appended, but not applied. It has six spectral bands
- Channel 1 433-453 nm (blue) for chlorophyll absorption
- Channel 2 510-530 nm (green) for chlorophyll concentration
- Channel 3 540-560 nm (yellow) for Gelbstoff concentration (to
- Channel 4 660-680 nm (red) for aerosol absorption
- Channel 5 700-800 nm (far red) for land and cloud detection
- Channel 6 10.5-12.5 microns (infra-red) for surface temperature
Most of the Level 1 products were processed further into 4 km, reduced
resolution Level 1a products.
Each data segment is a single CZCS scene with a maximum of 2 minutes
of data. Approximately 66,000 2-minute individual scenes were
Level 1 data have a scan width of approximately 1600 km
with a spatial resolution at nadir of 800 meters in each of the 6
DATA MEDIA AND FORMATS:
The ESA/EPO NIMBUS-7 CZCS Level 1 products are recordered on
Computer Compatible Tape (CCTs) in a format that is "partially"
conformed to the Standard Family Format (SFF) convention.
Conventionally, the individual tape is referred to as a physical
volume. The logical volume refers to data files logically grouped on
the tape. The SEF allows that more than one logical volume (a volume
set) be stored on the same physical volume. One logical volume can
also be split between different physical volumes.
The logical volume of ESA/EPO CZCS Level 1 product consists of the
- A volume directory file which contains the logical and physical
structure of the tape. It consists of:
a volume descriptor record;
a file pointer record;
a text record corresponding to the "comment statement" of a computer
programme to provide information in human readable form.
- The data files which consists of QuicklooksFile, CRTdata FIle and
Ozonedata File. The Ozone data are additional relevant information,
and will not be contained when the data corresponding to the CZCS
observation data are not available.
- A null volume directory file which indicates the end of the logical
volume of a volume set (a collection of logical volumes).
To order data please see
Start Date: 1978-11-02Stop Date: 1986-06-22
ATMOSPHERE > AEROSOLS
ATMOSPHERE > CLOUDS
OCEANS > OCEAN CHEMISTRY > PIGMENTS
OCEANS > OCEAN OPTICS > ABSORPTION
OCEANS > OCEAN OPTICS > OCEAN COLOR
OCEANS > OCEAN OPTICS > TURBIDITY
OCEANS > OCEAN TEMPERATURE
SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > BRIGHTNESS TEMPERATURE
SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS
OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL
ISO Topic Category
Data Set Progress
Distribution Media: 6250 bpi CCT
Distribution Media: Exabyte 8200
Role: DIF AUTHOR
Phone: +39 06 94180777
Fax: +39 06 94180292
Email: eohelp at esa.int
ESA/ESRIN Via G. Galilei
Postal Code: 00044
Creation and Review Dates
Last DIF Revision Date: 2006-05-05