MODIS/Terra+Aqua Photosynthetically Active Radiation Daily/3-Hour L3 Global 0.05Deg CMG V061
The MCD18C2 Version 6.1 is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Photosynthetically Active Radiation (PAR) gridded Level 3 product produced daily at 0.05 degree (5,600 meters at the equator) resolution with estimates of PAR every 3 hours. PAR is incident solar radiation in the visible spectrum (400-700 nanometers) and is an important variable in land-surface models that address a variety of scientific and application issues. The MCD18 products are based on a prototyping algorithm that uses multi-temporal signatures of MODIS data to derive surface reflectance and then calculate incident PAR using the look-up table (LUT) approach. The LUTs consider different types of loadings of aerosols and clouds at a variety of illumination/viewing geometry. Global PAR products are generated from MODIS and geostationary satellite data. Additional details regarding the methodology used to create the data are available in the Algorithm Theoretical Basis Document (ATBD) (https://lpdaac.usgs.gov/documents/106/MCD18_ATBD.pdf)). Provided in the MOD18C2 product are layers for instantaneous PAR array for each individual MODIS overpass and 3-hour PAR array along with a View Zenith Angle layer. Validation at stage 1 ( https://modis-land.gsfc.nasa.gov/MODLAND_val.html) has been achieved for the MODIS Surface Radiation products. Further details regarding MODIS land product validation for the MCD18 data products are available from the MODIS Land Team Validation site ( https://modis-land.gsfc.nasa.gov/ValStatus.php?ProductID=MCD18). * 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 MCD18 suite has added CMG products (MCD18C1/MCD18C2).
| Science Keywords: |
|
||
| 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): | Terra, Aqua | |
| Data Center(s): | LP DAAC | Instrument(s): | MODIS |
| Version: | 061 | ||
- Title: MODIS/Terra+Aqua Photosynthetically Active Radiation Daily/3-Hour L3 Global 0.05Deg CMG V061
- Creator: Dongdong Wang
- Publisher: NASA EOSDIS Land Processes DAAC
- Release Date: 2021-03-18T00:00:00.000Z
- Other Citation Details: The DOI landing page provides citations in APA and Chicago styles.
- Linkage: https://doi.org/10.5067/MODIS/MCD18C2.061
10.5067/MODIS/MCD18C2.061
https://doi.org
- USER'S GUIDE: https://lpdaac.usgs.gov/documents/750/MCD18_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/106/MCD18_ATBD.pdf, The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
- SCIENCE DATA PRODUCT VALIDATION: https://modis-land.gsfc.nasa.gov/MODLAND_val.html, Validation at stage 1 has been achieved for the MODIS Surface Radiation products.
- SCIENCE DATA PRODUCT VALIDATION: https://modis-land.gsfc.nasa.gov/ValStatus.php?ProductID=MCD18, Further details regarding MODIS land product validation for the MCD18 data products are available from the MODIS Land Team Validation site.
Collection Information
-
Purpose
Science Research -
Version Description
Collection Version 6.1 Processing and Reprocessing - Search for granules from this collection
Data Identification
-
Processing Level
3
Sensor Measurements
- Quality
-
Collection Progress
Active
-
Access Constraints
None
Data Dates
| Creation | |
| Last Revision |
Related URLs
Other Descriptive Keywords
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: 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
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| Terra |
|
No dates provided. |
| Aqua |
|
No dates provided. |
Temporal Information
Spatial Information
Gridded Resolutions
Gridded Resolution 1
X Dimension5600.0 Meters
Y Dimension5600.0 Meters
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | MODIS Climate Modeling Grid (CMG) | CARTESIAN | CARTESIAN |
Resolution and Coordinate System
Horizontal Data Resolution
Location Keywords
- GEOGRAPHIC REGION
- GLOBAL
Data Centers
-
LP DAAC
ARCHIVERLand 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
Contact DetailsLP DAAC User Services is the point of contact for answering questions concerning data products, data access, and online applications.
-
-
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
-
NASA/GSFC Code 922
GREENBELT, Maryland 20771
301-614-5515
Contact DetailsContact for data content concerns
-
Data Contacts
-
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
-
Format: HDF-EOS2
Format Type: Native
Format Description: Hierarchical Data Format - Earth Observing System Version 2
Media: HTTP
Average File Size: 1.2 GB
Total Collection File Size Begin Date: 2001-01-01T00:00:00.000Z
File Distribution Information
There is no direct distribution information for this collection.