Short Name:

MYD17A3HGF

MODIS/Aqua Net Primary Production Gap-Filled Yearly L4 Global 500m SIN Grid V061

The MYD17A3HGF Version 6.1 product provides information about annual Net Primary Production (NPP) at 500 meter (m) pixel resolution. Annual NPP is derived from the sum of all 8-day Net Photosynthesis (PSN) products (MYD17A2H) from the given year. The PSN value is the difference of the Gross Primary Productivity (GPP) and the Maintenance Respiration (MR). The MYD17A3HGF will be generated at the end of each year when the entire yearly 8-day MYD15A2H (https://doi.org/10.5067/modis/myd15a2h.061) is available. Hence, the gap-filled MYD17A3HGF is the improved MYD17, which has cleaned the poor-quality inputs from 8-day Leaf Area Index and Fraction of Photosynthetically Active Radiation (FPAR/LAI) based on the Quality Control (QC) label for every pixel. If any LAI/FPAR pixel did not meet the quality screening criteria, its value is determined through linear interpolation. However, users cannot get MYD17A3HGF in near-real time because it will be generated only at the end of a given year. Stage 3 (https://landweb.modaps.eosdis.nasa.gov/cgi-bin/QA_WWW/newPage.cgi?fileName=maturity) validation has been achieved for MYD17 products. Improvements/Changes from Previous Versions * The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017. * A polarization correction has been applied to the L1B Reflective Solar Bands (RSB). * The product uses Climatology LAI/FPAR as back up to the operational LAI/FPAR.

Overview Download Data Services Tools Citation Information Documentation Additional Information

Science Keywords:

Spatial Extent:

Bounding Rectangle:

N: 90.0 S: -90.0 E: 180.0 W: -180.0

Data Format(s):

Distribution: HDF-EOS

Temporal Extent:

2002-01-01 to now

Platform(s):

Aqua

Data Center(s):

LP DAAC

Instrument(s):

MODIS

Version:

061

Download Options

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Title: MODIS/Aqua Net Primary Production Gap-Filled Yearly L4 Global 500m SIN Grid V061
Creator: Steven Running, Maosheng Zhao
Publisher: NASA EOSDIS Land Processes DAAC
Release Date: 2021-03-15T00:00:00.000Z
Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
Linkage: https://doi.org/10.5067/MODIS/MYD17A3HGF.061

USER'S GUIDE: https://lpdaac.usgs.gov/documents/972/MOD17_User_Guide_V61.pdf, The technical information in the User's Guide enables users to interpret and use the data products.
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD): https://lpdaac.usgs.gov/documents/95/MOD17_ATBD.pdf , The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
GENERAL DOCUMENTATION: https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/6/MYD17A3HGF, The File Specification provides a description of the product file including Scientific Data Sets and their attributes.

Purpose
Science Research
Version Description
Collection Version 6.1 Processing and Reprocessing
DOI
10.5067/MODIS/MYD17A3HGF.061

https://doi.org
Search for granules from this collection

Data Dates

Creation	2013-07-17T11:53:29.840Z
Last Revision	2015-09-30T10:48:51.778Z

Processing Level

GRID

Quality

Collection Progress
Active
Access Constraints

None

Related URLs

Additional Attributes

Name: NDAYS_COMPOSITED INT Description: Number of days of the data that have been composited.
Name: QAPERCENTGOODQUALITY INT Description: Percent of pixels with good quality
Name: QAPERCENTOTHERQUALITY INT Description: Percent of pixels with not so good quality
Name: VERTICALTILENUMBER INT Description: Vertical tile number of a grid, which increases from top to bottom.
Name: TileID INT Description: MODIS Land tile identification number which represents a geographical area on the surface of the Earth bounded by latitude and longitude coordinates.
Name: QAPERCENTGOODNPP INT Description: Percent of pixels with good Net Primary Production (NPP) quality
Name: QAPERCENTGOODPSN INT Description: Percent of pixels with good Net Photosynthesis (PSN) quality
Name: PROCESSVERSION STRING Description: Version of the process software that generated the product.
Name: identifier_product_doi STRING Description: Digital object identifier that uniquely identifies this data product
Name: identifier_product_doi_authority STRING Description: URL of the digital object identifier resolving authority
Name: HORIZONTALTILENUMBER INT Description: Horizontal tile number of a grid, which increases from left to right.

Projects

Project Short Name	Campaigns	Project Dates
Aqua	Aqua	No dates provided.

Coverage Type	Zone Identifier	Geometry	Granule Representation
HORIZONTAL	MODIS Sinusoidal Tiling System	CARTESIAN	GEODETIC

Resolution and Coordinate System

Horizontal Data Resolution

Gridded Resolutions
- Gridded Resolution 1
  X Dimension
  500.0 Meters
  Y Dimension
  500.0 Meters

Tiling Identification Systems

System Name	Coordinate 1 Min	Coordinate 1 Max	Coordinate 2 Min	Coordinate 2 Max
MODIS Tile SIN	0.0	35.0	0.0	17.0

Location Keywords

- GEOGRAPHIC REGION
- GLOBAL

LP DAAC
ARCHIVER

Land Processes Distributed Active Archive Center
- U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
  Sioux Falls, South Dakota 57198
M-F, 8 a.m. to 4 p.m. Central Time

605-594-6116

866-573-3222

Email
Contact Details
LP DAAC User Services is the point of contact for answering questions concerning data products, data access, and online applications.
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
https://lpdaac.usgs.gov/

Home Page
NASA/GSFC/SED/ESD/TISL/MODAPS
PROCESSOR

MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
- NASA/GSFC Code 922
  GREENBELT, Maryland 20771
301-614-5515

Email
Contact Details
Contact for data content concerns
https://modaps.modaps.eosdis.nasa.gov/

Home Page

LP DAAC User Services
User Services

LP DAAC User Services
LP DAAC
- U.S. Geological Survey, Earth Resources Observation and Science (EROS) Center
  Sioux Falls, South Dakota 57198
M-F, 8 a.m. to 4 p.m. Central Time

605-594-6116

866-573-3222

Email
Contact Details
LP DAAC User Services is the point of contact for answering questions concerning data products, data access, and online applications.
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
https://lpdaac.usgs.gov/

Home Page

Metadata Dates

Creation	2019-10-29T18:54:00.000Z
Last Revision	2021-03-18T20:16:00.000Z

File Distribution Information

Format: HDF-EOS

Format Type: Native

Media: HTTP

Average File Size: 0.8 MB

Total Collection File Size Begin Date: 2002-12-27T00:00:00.000Z

CMR Search

MODIS/Aqua Net Primary Production Gap-Filled Yearly L4 Global 500m SIN Grid V061

Collection Information

Data Identification

Data Dates

Related URLs

Other Descriptive Keywords

Additional Attributes

Acquisition Information

Projects

Temporal Information

Spatial Information

Resolution and Coordinate System

Horizontal Data Resolution

Gridded Resolutions

Gridded Resolution 1

Tiling Identification Systems

Location Keywords

Data Centers

LP DAAC

Land Processes Distributed Active Archive Center

NASA/GSFC/SED/ESD/TISL/MODAPS

MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Contacts

LP DAAC User Services

LP DAAC User Services

Metadata Dates

Archive And Distribution Information

File Distribution Information