Short Name:

MYD09Q1

MODIS/Aqua Surface Reflectance 8-Day L3 Global 250m SIN Grid V061

The MYD09Q1 Version 6.1 product provides an estimate of the surface spectral reflectance of Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) Bands 1 and 2, corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Provided along with the 250 meter (m) surface reflectance bands are two quality layers. For each pixel, a value is selected from all the acquisitions within the 8-day composite period. The criteria for the pixel choice include cloud and solar zenith. When several acquisitions meet the criteria the pixel with the minimum channel 3 (blue) value is used. Validation at stage 3 (https://modis-land.gsfc.nasa.gov/MODLAND_val.html) has been achieved for the MODIS Surface Reflectance products. Further details regarding MODIS land product validation for the MYD09 data product is available from the MODIS Land Team Validation site (https://modis-land.gsfc.nasa.gov/ValStatus.php?ProductID=MOD09). 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).

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

Temporal Extent:

2002-07-04 to now

Platform(s):

Aqua

Data Center(s):

LP DAAC

Instrument(s):

MODIS

Version:

061

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Title: MODIS/Aqua Surface Reflectance 8-Day L3 Global 250m SIN Grid V061
Creator: Eric Vermote
Publisher: NASA EOSDIS Land Processes DAAC
Release Date: 2021-02-01T00:00:00.000Z
Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
Linkage: https://doi.org/10.5067/MODIS/MYD09Q1.061

USER'S GUIDE: https://lpdaac.usgs.gov/documents/925/MOD09_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/305/MOD09_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/61/MYD09Q1, 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/MYD09Q1.061

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

Data Dates

Creation	2010-08-31T14:11:03.510Z
Last Revision	2015-09-30T10:48:21.231Z

Processing Level

Sensor Measurements

Quality

Collection Progress
Active
Access Constraints

None

Related URLs

Additional Attributes

Name: QAPERCENTGOODQUALITY INT Description: Percent of pixels with good quality
Name: QAPERCENTNOTPRODUCEDCLOUD INT Description: Percent of pixels under cloud
Name: QAPERCENTNOTPRODUCEDOTHER INT Description: Percent of pixels not produced due to some reason other than cloud
Name: QAPERCENTOTHERQUALITY INT Description: Percent of pixels with not so good quality
Name: QAPERCENTPOOROUTPUT250MBAND1 INT Description: The % of pixels in 250m band 1 that have a quality of our lowest class (i.e. not usable). A value of -1 indicates that that band was not processed.
Name: QAPERCENTPOOROUTPUT250MBAND2 INT Description: The % of pixels in 250m band 2 that have a quality of our lowest class (i.e. not usable). A value of -1 indicates that that band was not processed.
Name: QAPERCENTPOOROUTPUT500MBAND3 INT Description: The % of pixels in 500m band 3 that have a quality of our lowest class (i.e. not usable) . A value of -1 indicates that that band was not processed.
Name: QAPERCENTPOOROUTPUT500MBAND4 INT Description: The % of pixels in 500m band 4 that have a quality of our lowest class (i.e. not usable) . A value of -1 indicates that that band was not processed.
Name: QAPERCENTPOOROUTPUT500MBAND5 INT Description: The % of pixels in 500m band 5 that have a quality of our lowest class (i.e. not usable) . A value of -1 indicates that that band was not processed.
Name: QAPERCENTPOOROUTPUT500MBAND6 INT Description: The % of pixels in 500m band 6 that have a quality of our lowest class (i.e. not usable) . A value of -1 indicates that that band was not processed.
Name: QAPERCENTPOOROUTPUT500MBAND7 INT Description: The % of pixels in 500m band 7 that have a quality of our lowest class (i.e. not usable) . A value of -1 indicates that that band was not processed.
Name: HORIZONTALTILENUMBER INT Description: Horizontal tile number of a grid, which increases from left to right.
Name: VERTICALTILENUMBER INT Description: Vertical tile number of a grid, which increases from top to bottom.
Name: PROCESSVERSION STRING Description: Version of the process software that generated the product.
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: RESOLUTIONBANDS1AND2 STRING Description: Resolution of MODIS Bands 1 and 2
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

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
  250.0 Meters
  Y Dimension
  250.0 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	2019-06-26T16:39:00.000Z
Last Revision	2021-02-25T17:56:00.000Z

File Distribution Information

Format: HDF

Format Type: Native

Media: HTTP

Average File Size: 56.0 MB

Total Collection File Size Begin Date: 2002-07-04T00:00:00.000Z

CMR Search

MODIS/Aqua Surface Reflectance 8-Day L3 Global 250m 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