Introducing GEMS
The Global Environmental Monitoring System (GEMS) suite of sensors is designed to provide low-cost, high-performance environmental intelligence.
From compact CubeSats, to next-generation sensors offering unprecedented weather insights, and field-level monitoring by UAV the GEMS suite delivers impactful data to the world’s decision makers.
GEMS-1
The pioneering sensor that launched the GEMS vision.
The GEMS-1 instrument kick-started Weather Stream’s mission.
Flying on the IOD-1 mission in 2019-2021, the GEMS-1 mission successfully demonstrated the GEMS technology and approach to radiometer design. It generated temperature and precipitation observations from sounding the 118 GHz O2 resonance line across 8 channels.
Space Technology
Growing global observations for the future
The GEMS family of spaceborne sensors expands environmental intelligence from orbit, delivering high-resolution data intelligence that empowers your next move.
GEMS-2
Next-generation environmental intelligence.
Starting with the Amethyst mission, the GEMS-2 platform advances the pioneering work of GEMS-1 to a more capable, operations-ready instrument.
With improved sensitivity, broader channel coverage, and enhanced onboard processing, GEMS-2 delivers high-quality observations of temperature, moisture, and precipitation across diverse environments.
GEMS-CZ coming soon
GEMS-CZ
The next-gen backbone of microwave sensing
GEMS-CZ will provide the precision, spectral coverage, and resilience required for the world’s forecasting needs.
The sensor was designed in close collaboration with NASA, and includes hyperspectral microwave sounding and class leading, proprietary RFI mitigation technology.
GEMS-PEARL coming soon
GEMS-PEARL
Microwave imaging for strategic intelligence
GEMS-PEARL introduces an imager-class passive microwave radiometer, extending the GEMS family beyond sounders.
GEMS-PEARL represents a step-change in low-cost microwave imaging and payload design, with the potential to provide fine-scale observations of offshore conditions
Terrestrial Technology
Precision measurements from the ground up.
The GEMS terrestrial suite extends our sensing capability beyond orbit, capturing fine-scale environmental detail at the Earth’s surface. With drone-mounted radiometers, mobile platforms, and fixed surface instruments, these systems provide flexible, high-frequency measurements of soil moisture, vegetation water content, snowpack, and precipitation.
By pairing ground and airborne assets with our spaceborne sensors, we deliver robust calibration, validation, and data fusion — ensuring that every observation is accurate, scalable, and commercially impactful. This layered approach transforms localized measurements into decision-ready insights for agriculture, energy, water management, and disaster response.
Soil Moisture Sensing
Weather Stream’s GEMS sensors can provide advanced soil moisture sensing by capturing high-resolution microwave radiometry data from orbit, enabling accurate, near-real-time assessments of surface moisture levels across vast and remote regions. This data is critical for applications such as flood forecasting, drought monitoring, agricultural planning, and infrastructure stability. By delivering consistent, global coverage with fine spatial detail, GEMS enhances the ability of governments, insurers, and environmental agencies to monitor ground conditions, model risk, and respond proactively to changing climate and weather patterns.