TRMM_1C51UW: Filtered Ground Radar Reflectivity for Satellite Validation

Four primary sites in Darwin (Australia), Houston (Texas), Kwajalein (Marshall Islands), and Melbourne (Florida) provide the core geographic scope for this dataset. It contains calibrated, quality-controlled ground-based radar reflectivity data processed by the University of Washington's 1C51UW algorithm to remove non-meteorological echoes like insects, birds, and anomalous propagation. This dataset is a Level 1C product from the Tropical Rainfall Measuring Mission (TRMM) Ground Validation effort, intended for comparison with satellite-based precipitation estimates.

Use Cases

• Validating TRMM satellite precipitation products using quality-controlled ground radar data.
• Analyzing the performance of the 1C51UW clutter-filtering algorithm across different meteorological regimes.
• Studying drop size distributions (DSD) by correlating radar data with co-located disdrometer measurements at sites like Kwajalein and Melbourne.
• Investigating non-meteorological radar echoes (e.g., from wildfires or chaff) in different geographic locations.

Strengths

• Data is part of a major NASA satellite validation project (TRMM), indicating a structured collection and QC process.
• Algorithm uses eight adjustable parameters (three height, five reflectivity thresholds) for optimized clutter removal.
• Cross-platform presence on Data.gov and NASA EarthData suggests recognized importance and archival stability.

Limitations

• Critical metadata conflicts: last update date is listed as both 2003-12-31 and 2026-04-09 across sources.
• Column names and dataset size (rows, file size) are explicitly listed as unknown, limiting immediate usability.
• Optimum use of the algorithm is described as time-consuming, requiring analyst intervention per volume scan.

Provenance

Source

University of Washington TRMM Ground Validation / National Aeronautics and Space Administration

Collection Method

Collected from ground-based radar, rain gauges, and disdrometers at validation sites, then processed with the 1C51UW filtering algorithm.

Freshness

2026-04-09 21:40:18.939289 (conflicts with 2003 date)

Geography

Primary sites: Darwin, Australia; Houston, Texas; Kwajalein, Republic of the Marshall Islands; Melbourne, Florida. Additional measurements at NASA Wallops Flight Facility, Virginia.