Aqua MODIS Daytime Observation Pointers for Surface Reflectance

MYDPTQKM files store spatial relationship information between sensor observations and output grid cells at a 250-meter resolution. This product, created by the LANCEMODIS organization, is generated daily in a Near Real Time (NRT) pipeline. It serves as a fundamental input for generating higher-level MODIS Surface Reflectance products.

Use Cases

• Selecting the most relevant sensor observation per grid cell for Level-3 compositing processes using the stored pointer information.
• Mapping raw sensor data to a geolocated grid for precise geometric alignment in surface reflectance algorithms.
• Analyzing the spatial distribution and frequency of multiple observations within Level-2G gridded products for quality assessment.

Strengths

• Provides daily Near Real Time (NRT) data delivery for time-sensitive applications.
• Offers high spatial detail with a 250-meter resolution grid.

Limitations

• Specific row count, file size, and historical archive depth are unknown.
• Data utility is dependent on the availability and quality of the primary MODIS/Aqua sensor observations.

Provenance

Source

NASA Earthdata, MODIS/Aqua sensor.

Collection Method

Satellite remote sensing data processed into Level-2G gridded geolocation pointers.

Time Range

Daily coverage; specific start date unknown.

Freshness

Daily updates in Near Real Time.

Geography

Global coverage from the Aqua satellite's orbit.