Full Name Cloud Profiling Radar (CPR) Status No longer operational
Instrument Agencies NASA Maturity
Instrument Type Cloud profile and rain radars Geometry Nadir-viewing
Instrument Technology Cloud and precipitation radar Sampling Sounding
Data Access Open Access Data Format HDF-EOS
Measurements and Applications Primary goal to provide data needed to evaluate and improve the way clouds are represented in global climate models. Measures vertical profile of clouds.
Resolution Summary Vertical: 500 m, Cross-track: 1.4 km, Along-track: 2.5 km
Swath Summary Instantaneous Footprint < 2 km
Accuracy Summary detects ice clouds optical depth >1, water clouds optical depth >3, ice content to +100%, -50%, liquid content to <50%, in-cloud heating to within 1K day-1 km-1
Waveband Summary Microwave: 94 GHz
MW (~0.1 cm - ~100 cm)
W-Band (94 GHz)
Instrument Measurements
Measurements Overview
Atmospheric Temperature FieldsCloud base height
Cloud particle properties and profileCloud liquid water (LT, HT, TC)
Precipitation Profile (liquid or solid)
Cloud ice (LT, HT, TC)
Cloud ice content (at cloud top)
Cloud optical depth
Cloud type, amount and cloud top temperatureCloud imagery
Cloud type
Cloud cover
Liquid water and precipitation ratePrecipitation intensity at the surface (liquid or solid)
Radiation budgetDownward long-wave irradiance at Earth surface
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Cloud Properties click here click here search ECV Inventory records
Earth Radiation Budget click here click here search ECV Inventory records
Precipitation click here click here search ECV Inventory records
Instrument Missions
CloudSat - CloudSat (2006 - 2023)