Aqua Satellite Near-Real-Time Daily Ephemeris Data

PM1EPHND files contain daily spacecraft definitive ephemeris data for the Aqua satellite in a native binary format. This MODIS ancillary data is preprocessed by the ECS system to an internal standard supported by the ECS SDP Toolkit. The data is produced by the LANCEMODIS organization for use in geolocating Earth remote sensing observations.

Use Cases

• Calculate precise satellite position and velocity for geolocating MODIS observations using the definitive ephemeris data.
• Integrate the preprocessed ephemeris data with other MODIS ancillary datasets via the ECS SDP Toolkit for geolocation workflows.
• Analyze the daily time-series of the Aqua satellite's orbit for mission planning and sensor data validation.

Strengths

• Data is provided in a Near Real-Time (NRT) operational mode, supporting timely analysis.
• Data is preprocessed to an internal standard compatible with the ECS SDP Toolkit, ensuring consistency.

Limitations

• The dataset is provided in a proprietary SDP Toolkit Binary Format, requiring specific software for access and interpretation.
• Specific data volume, temporal coverage, and update frequency details are not provided in the source description.

Provenance

Source

LANCEMODIS organization via NASA Earthdata.

Collection Method

Preprocessed from PM1 Platform Attitude Data by the ECS (EOSDIS Core System).

Freshness

Near Real-Time (NRT)

Geography

Global, corresponding to the Aqua satellite's orbit.