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.
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| Spatial Extent: | Bounding Rectangle: N: 90.0 S: -90.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: HDF-EOS2 |
| Temporal Extent: | Platform(s): | Aqua | |
| Data Center(s): | LP DAAC | Instrument(s): | MODIS |
| Version: | 061 | ||
- 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
10.5067/MODIS/MYD17A3HGF.061
https://doi.org
- 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.
- SCIENCE DATA PRODUCT VALIDATION: https://modis-land.gsfc.nasa.gov/MODLAND_val.html, Validation at stage 3 has been achieved for the MODIS Gross and Net Primary Productivity data products.
- SCIENCE DATA PRODUCT VALIDATION: https://modis-land.gsfc.nasa.gov/ValStatus.php?ProductID=MOD17, Further details regarding MODIS land product validation for the MYD17 data products are available from the MODIS Land Team Validation site.
Collection Information
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Purpose
Science Research -
Version Description
Collection Version 6.1 Processing and Reprocessing - Search for granules from this collection
Data Identification
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Processing Level
4
GRID
- Quality
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Collection Progress
Active
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Access Constraints
None
Data Dates
| Creation | |
| Last Revision |
Related URLs
Other Descriptive Keywords
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.
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| Aqua |
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No dates provided. |
Temporal Information
Spatial Information
Gridded Resolutions
Gridded Resolution 1
X Dimension500.0 Meters
Y Dimension500.0 Meters
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | MODIS Sinusoidal Tiling System | CARTESIAN | GEODETIC |
Resolution and Coordinate System
Horizontal Data Resolution
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
Data Centers
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LP DAAC
ARCHIVERLand Processes Distributed Active Archive Center
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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
Contact DetailsLP 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
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NASA/GSFC/SED/ESD/TISL/MODAPS
PROCESSORMODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
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NASA/GSFC Code 922
GREENBELT, Maryland 20771
301-614-5515
Contact DetailsContact for data content concerns
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Data Contacts
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LP DAAC User Services
User ServicesLP 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
Contact DetailsLP 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
-
Archive And Distribution Information
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Format: HDF-EOS2
Format Type: Native
Format Description: Hierarchical Data Format - Earth Observing System Version 2
Media: HTTP
Average File Size: 0.8 MB
Total Collection File Size Begin Date: 2002-12-27T00:00:00.000Z
File Distribution Information
There is no direct distribution information for this collection.