CYGNSS Satellite Full Delay Doppler Map Records

Full Delay Doppler Map sensor data from the CYGNSS satellite constellation's Delay Doppler Mapping Instrument. The dataset contains lossless, high-resolution two-dimensional maps of scattered GPS signals, with individual data records typically spanning 10-15 minutes. It was produced by POCLOUD and last updated in November 2020.

Use Cases

• Retrieving sea surface wind speed by analyzing signal strength variations within the Full Delay Doppler Map (DDM).
• Studying land surface properties like soil moisture by examining the delay and Doppler frequency shift of the scattered signal.
• Calibrating or validating DDM processing algorithms using the lossless bit resolution of the full DDM data records.
• Analyzing signal scattering patterns over specific target areas of interest commanded for data collection.

Strengths

• Contains lossless, full bit-resolution data compared to standard truncated DDMs.
• Data records provide a wider sampling range of delay and Doppler values.

Limitations

• Data records are short-duration (10-15 minutes), limiting long-term continuous observation of a single location.
• The dataset's last known update was in 2020, which may limit its use for studying recent phenomena.

Provenance

Source

NASA Earthdata via POCLOUD.

Collection Method

Measured by the Delay-Doppler Mapping Instrument aboard the CYGNSS satellite constellation, processing incoming GPS radio frequency streams in real-time.

Freshness

Last updated 2020-11-17.

Geography

Global coverage from the CYGNSS satellite constellation overpasses.