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Swath Center Pixel Extractor for Giovanni-3
Entry ID: G3_swathCenterPixel
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Summary
Abstract: The Swath Center Pixel Extractor Operation for Giovanni-3 is a
special-purpose service designed to perform center-pixel
subsetting on swath data. The service takes a series of swaths
as an input and creates a corresponding series of output swaths.
The output values are the result of applying center-pixel
filtering to the input swaths.

Input parameters:
Geophysical variables.

Output Description:
Center-pixel filtered data in satellite swath format

Output Parameters:
Same as input parameters

File Type:
Both input and output files are HDF4.

Sub-definitions:

  • Swath: 1- or 2-dimensional data structure.

  • Scan line: horizontal dimension of data structure.

  • Vertical level of measurement: vertical dimension of data structure.

  • Pixel -- individual data element of the data structure.



Service Description:


  1. Read in each swath (independently).

  2. Mask out bad/missing/fill values.

  3. Extract center pixel from each scan line; write to output file.

  4. Write corresponding time, latitude, longitude, and pressure level (if
    needed) to output file.



Algorithm Details
If the data contains a profile for each pixel, the profile
for the center pixel is extracted.

Caveats/Warnings:
All swaths are assumed to have the same width and number of
vertical levels (where needed), but they may vary in the number
of scan lines in the swath.

Origin/Software:


User Options




Other information:
Related URL
Link: GET SERVICE
Description: Access Giovanni.
Service Citation
URL: http://giovanni.gsfc.nasa.gov
Parent SERF
This data set description is a member of a collection. The collection is described in
Giovanni
Service Keywords
DATA ANALYSIS AND VISUALIZATION >VISUALIZATION/IMAGE PROCESSING   [Definition]
Science Keywords
ATMOSPHERE >AEROSOLS   [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY   [Definition]
ATMOSPHERE >ATMOSPHERIC PHENOMENA   [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE   [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR   [Definition]
ATMOSPHERE >CLOUDS   [Definition]
ATMOSPHERE >PRECIPITATION >SNOW   [Definition]
ATMOSPHERE >PRECIPITATION   [Definition]
OCEANS >OCEAN CIRCULATION   [Definition]
OCEANS >OCEAN OPTICS   [Definition]
ATMOSPHERE >ATMOSPHERIC PRESSURE   [Definition]
ISO Topic Category
BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT
OCEANS
Project
EOSDIS >Earth Observing System Data Information System   [Information]
ESIP >Earth Science Information Partners Program   [Information]
GIOVANNI-3 >GES-DISC DAAC Interactive Online Visualization and ANalysis Infrastructure   [Information]
Quality
Data quality is dependent on input data sets and processing.
Access Constraints
There are no access constraints to data in Giovanni-3.
Use Constraints
Use of the data and the Giovanni system should be acknowledged in
published works and presentations.
Service Provider
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Service Provider Personnel
Name: STEVE KEMPLER
Phone: 301-614-5473
Phone: 1-877-422-1222
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Email: Steven.J.Kempler at nasa.gov
Contact Address:
Goddard DAAC Helpdesk
GES DAAC
Global Change Data Center, Code 610.2
NASA Goddard Space Flight Center
 City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Personnel
JAMES G. ACKER
Role: SERF AUTHOR
Phone: 301-614-5435
Fax: 301-614-5268
Email: James.G.Acker.1 at gsfc.nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.2
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Creation and Review Dates
SERF Creation Date: 2006-10-27
SERF Last Revision Date: 2007-07-13
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