Temperature and moisture through the air over the tropics (TROPICS satellite)
What it measures. Vertical profiles of air temperature and humidity through the atmosphere over the tropics, capturing how warm and moist the air is at many heights.
How it's made. Produced from a microwave sounder aboard the small TROPICS Pathfinder satellite, which reads natural microwave signals tied to oxygen and water vapor and converts them into temperature and moisture profiles.
How & where you'd use it. Aimed at studying tropical storms and hurricanes, giving frequent looks at the 3D temperature and moisture structure that helps researchers understand how these storms form and intensify.
What's measured
Coverage & cadence
- Time span2021-08-07 → 2023-12-17
- Measured byTROPICS/01 (TMS)
- Processing levelLevel 2
- Spatial extent-180, -90, 180, 90
- StatusCOMPLETE
What you can do with it
- Track deforestation, fire scars and land-cover change
- Monitor crop and vegetation health (NDVI/EVI)
- Map how built-up vs. green an area is over time
Official description
The "Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats" (TROPICS) mission has a goal of providing nearly all-weather observations of three-dimensional temperature and humidity, as well as cloud ice and precipitation horizontal structure, at high temporal resolution to conduct high-value science investigations of tropical cyclones. The mission comprises a constellation of six identical Space Vehicles (SVs) conforming to the 3U form factor and hosting a passive microwave spectrometer payload. This dataset is produced from the Pathfinder satellite, a single 3U small satellite, which has launched previous to the constellation, on a sun-synchronous orbital plane. Each SV hosts an identical high-performance spectrometer named the TROPICS Millimeter-wave Sounder (TMS) that will provide temperature profiles using seven channels near the 118.75-GHz oxygen absorption line, water vapor profiles using three channels near the 183-GHz water vapor absorption line, imagery in a single channel near 90 GHz for precipitation measurements (when combined with higher resolution water vapor channels), and a single channel near 205 GHz that is more sensitive to cloud-sized ice particles. This dataset is from the Pathfinder satellite, as the full version of the Level 2B geophysical retrieval of atmospheric vertical temperature (kelvins) at the larger unified F-band resolution, retrieval of vertical moisture (g/kg) at the finer G-band spatial resolution, and total Precipitable Water (mm) at the finer G-band spatial resolution. Each TROPICS netCDF file contains a granule of data with 81 spots and approximately 2880 scans, where a granule is defined as an orbit's worth of data.
Get the data
import earthaccess
earthaccess.login(strategy="netrc") # free Earthdata Login
results = earthaccess.search_data(
short_name="TROPICS01MIRSL2B",
version="1.0",
bounding_box=(-122.5, 37.2, -121.8, 37.9), # your area (W,S,E,N)
temporal=("2024-01-01", "2024-12-31"), # your dates
)
files = earthaccess.open(results) # stream straight from GES_DISC Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package. Official links
- Access the data via HTTPS GET DATA
- Access the data via the OPeNDAP protocol. USE SERVICE API
- Use the Earthdata Search to find and retrieve data sets across multiple data centers. GET DATA
- TROPICS L2b Radiance ATBD VIEW RELATED INFORMATION
- TROPICS User Guide VIEW RELATED INFORMATION
- TROPICS01L2B README VIEW RELATED INFORMATION