TRMM_2A56: Rain Gauge Rain Rate Ground Validation

TRMM_2A56 contains 1-minute hourly rain rates derived from tipping bucket rain gauge data using a cubic spline interpolation algorithm. The dataset is part of the Tropical Rainfall Measuring Mission (TRMM) Ground Validation effort, which collects quality-controlled data from ground-based instruments to validate satellite products. Measurements are taken from primary sites including Darwin, Houston, Kwajalein, and Melbourne, as well as from NASA Wallops Flight Facility.

Use Cases

• Validating TRMM satellite precipitation products based on ground-based rain gauge and disdrometer data.
• Analyzing high-temporal-resolution (1-minute) rain rates for hydrological modeling.
• Studying drop size distributions (DSD) using data from Joss Waldvogel, Parsivel, and video disdrometers.
• Comparing rainfall characteristics across diverse geographic sites (e.g., tropical Kwajalein vs. continental Houston).

Strengths

• Data is quality-controlled as part of the TRMM Ground Validation effort.
• Rain rates are generated at a high temporal resolution (1-minute).
• Includes measurements from a network of instruments (rain gauges, disdrometers) at multiple long-term sites.

Limitations

• Column names and dataset size (rows, file size) are unknown across all sources.
• Sources disagree on the last updated date (2016 vs. 2026), indicating potential metadata inconsistency.
• The interpolation algorithm (rgmin) is described but the specific data format and access details are sparse.

Provenance

Source

NASA GES DISC, as part of the TRMM Ground Validation program.

Collection Method

Rain rates generated by the 'rgmin' program applying cubic spline interpolation to tipping bucket rain gauge data.

Freshness

2026-04-09 21:40:03.758582

Geography

Primary sites: Darwin, Australia; Houston, Texas; Kwajalein, Republic of the Marshall Islands; Melbourne, Florida; NASA Wallops Flight Facility (WFF) and vicinity.