Introduction
In February 2021 Planet released the SkySat Basic L1A All-Frames asset.
Summary
- Addition of a new SkySat asset:
- Item-type: SkySatCollect | asset-type: basic_l1a_all_frames
- SkySat satellites capture up to 50 frames per second per Collect. The All-frames asset includes all of the originally captured frames in a Collect, uncalibrated and in a raw digital number format. Delivered as a zip file containing all frames as basic L1A panchromatic DN imagery files, with accompanying RPC txt files, and a JSON pinhole camera model.
- The All-Frames is meant for very technical users, interested in using near-raw data with extensive satellite metadata.
- This telemetry data (along with the accompanying camera model) is beneficial for super-resolution and 3D modeling.
- Current users include Google (via custom pipeline), Kayrros (for super-res and 3D), and NASA (for 3D).
Details:
- Contents include:
- All frames - folder
- Image Frame File – TIFF format
- Rational Polynomial Coefficients – Text File
- Pinhole camera model - JSON format
- Metadata File – JSON format
- Frame Index – CSV file
- The frame_index csv file accompanies the all-frames, with telemetry data for each frame, including:
- X,Y,Z satellite alignment in both Earth Centered Inertial (ECI) and Earth Centered, Earth Fixed coordinate systems (ECEF)
- Pointing quaternions in both ECI and ECF
- Approximately ~1000 frames per Collect
- Ground Sample Distance:
- SkySats 3 - 13: 0.81 m
- SkySats 14 - 19: 0.72 m
- Not available to download through Explorer, primarily due to the massive size of the asset zip file (~10 GB). Customers can download through the Data API or Orders
- Customers will have access to the All-Frames asset by default
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