# Source: MODIS Land Surface Temperature/3-Band Emissivity 8-Day
# Type: cog
# Catalog: STACConnector
# Generated by: folia catalog import
# Generated at: 2026-02-08T00:48:39.846201+00:00
#
# Do not edit manually - will be overwritten on next import.

source:
  id: planetary-computer-modis-21A2-061
  name: MODIS Land Surface Temperature/3-Band Emissivity 8-Day
  type: cog
  url: https://planetarycomputer.microsoft.com/api/stac/v1/collections/modis-21A2-061
  description: A suite of Moderate Resolution Imaging Spectroradiometer (MODIS) Land
    Surface Temperature and Emissivity (LST&E) products are available in Collection
    6.1. The MOD21 Land Surface Temperatuer (LST) algorithm differs from the algorithm
    of the MOD11 LST products, in that the MOD21 algorithm is based on the ASTER Temperature/Emissivity
    Separation (TES) technique, whereas the MOD11 uses the split-window technique.
    The MOD21 TES algorithm uses a physics-based algorithm to dynamically retrieve
    both the LST and spectral emissivity simultaneously from the MODIS thermal infrared
    bands 29, 31, and 32. The TES algorithm is combined with an improved Water Vapor
    Scaling (WVS) atmospheric correction scheme to stabilize the retrieval during
    very warm and humid conditions. This dataset is an 8-day composite LST product
    at 1,000 meter spatial resolution that uses an algorithm based on a simple averaging
    method. The algorithm calculates the average from all the cloud free 21A1D and
    21A1N daily acquisitions from the 8-day period. Unlike the 21A1 data sets where
    the daytime and nighttime acquisitions are separate products, the 21A2 contains
    both daytime and nighttime acquisitions as separate Science Dataset (SDS) layers
    within a single Hierarchical Data Format (HDF) file. The LST, Quality Control
    (QC), view zenith angle, and viewing time have separate day and night SDS layers,
    while the values for the MODIS emissivity bands 29, 31, and 32 are the average
    of both the nighttime and daytime acquisitions. Additional details regarding the
    method used to create this Level 3 (L3) product are available in the Algorithm
    Theoretical Basis Document (ATBD).
  provider: NASA LP DAAC at the USGS EROS Center
  license: proprietary
  metadata:
    stac: true
    stac_api: true
    connector_id: planetary-computer
    tags:
    - NASA
    - MODIS
    - Satellite
    - Global
    - Temperature
    - MOD21A2
    - MYD21A2
    dataset:
      tier: 1
      thematic_group: Climate & Weather
      format: cog
      crs: EPSG:4326
      temporal:
        range: 2000-02-16/..
        frequency: daily
        type: time_series
        default_range: latest
      quality:
        coverage: global
      layout:
        type: tiled
      stac_collection_id: modis-21A2-061
      homepage: https://planetarycomputer.microsoft.com/api/stac/v1/collections/modis-21A2-061