ECOSTRESS Spacecraft Attitude and Ephemeris Data at 1-Second Intervals

Global data between 52° N and 52° S latitudes provides corrected and uncorrected attitude quaternions and spacecraft ephemeris from the International Space Station. The ECO_L1B_ATT product contains vectors for an entire orbit, recorded at 1-second intervals, and is distributed in HDF5 format by LPCLOUD. The instrument was launched in June 2018, with operations resuming after anomalies and a firmware update enabling 5-band mode in April 2023.

Use Cases

• Correcting geolocation of ECOSTRESS thermal imagery using the attitude quaternion and ephemeris data layers.
• Analyzing spacecraft trajectory and orientation changes over time with Earth-centered inertial (ECI) position and velocity vectors.
• Identifying scenes potentially affected by solar array obstructions using the 'FieldOfViewObstruction' metadata field for data quality assessment.
• Synchronizing data acquisition timelines by searching for products using orbit numbers, as spatial queries are not supported.

Strengths

• Data provided at high-temporal-resolution 1-second intervals for precise tracking.
• Includes both corrected and uncorrected attitude and ephemeris data for validation.
• Contains specific metadata ('FieldOfViewObstruction') to flag potential data obstructions from October 24, 2024 onwards.

Limitations

• Known data acquisition gaps occurred in 2018 and 2019 due to mass storage unit anomalies.
• Spatial queries are not possible; users must search by orbit number, complicating geographic selection.
• The 'FieldOfViewObstruction' field was not reliably populated for orbits prior to October 24, 2024.

Provenance

Source

NASA ECOSTRESS mission, data processed and distributed by LPCLOUD.

Collection Method

Measurements obtained from the International Space Station (ISS).

Time Range

Data collection began June 29, 2018, with ongoing acquisitions.

Freshness

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Geography

Global coverage between 52 degrees north and 52 degrees south latitude.