Tomorrow.io explained how its next satellite system would measure storms, wind, moisture, clouds, and rain. Better data could help AI forecasts, but the company has not published the final fleet size or real warning gains.
New to this? Read it in simple words
- Tomorrow.io showed the planned sensors for DeepSky, its next weather satellite system. Each satellite would carry five kinds of instrument.
- They would measure rain, wind, moisture and clouds. They could study the same area at almost the same time.
- Better data could help AI forecasts, especially over oceans. Ground radar covers almost none of the ocean, which is about 71 percent of Earth.
- The new satellites are still being built, and the full design has not flown. It is not yet proven that they would give earlier warnings.
- Sensor
- A device that measures something, such as heat, light or movement.
- Radar
- A tool that sends out radio signals to find and measure things like rain.
Five sensors would read one storm together
DeepSky would place five kinds of instrument on each satellite. A microwave sounder would measure temperature and moisture through most clouds. A rain radar would send a signal into a storm and measure the structure of the rain.
Visible and infrared cameras would follow clouds, heat, and possible fires. Two tools that use navigation satellite signals would measure air conditions and ocean wind. Each sensor sees something the others cannot see well.
The instruments would fly on the same spacecraft. This matters because they could study the same area at almost the same time. The combined data could give weather models a stronger picture of what is happening now, especially over oceans and places with little ground radar.
The full DeepSky system is still being built. Real flights and outside forecast tests must show the benefit.
The data gap is real, but the benefit is still a plan
Tomorrow.io says more than five billion people live outside ground radar coverage. It calls this a company estimate, not an outside measurement. About 71 percent of Earth is ocean, and ground radar covers almost none of it.
Better observations may help an AI model notice a storm changing quickly. They may also help national weather services give earlier warnings. However, a sensor plan does not yet prove a longer warning time or a more accurate forecast.
Tomorrow.io clearly says DeepSky is being built and does not describe what is in orbit now. Its first satellite group has 11 active microwave sounders. Earlier radar test satellites showed that small spacecraft can measure rain, but DeepSky’s full five-sensor design has not flown.
Public value needs public evidence
The company has not published a final number of DeepSky satellites, a full launch schedule, or exact warning gains. Those details will matter. More satellites can shorten the time between measurements, while fast delivery decides whether an observation reaches a forecaster in time.
National weather agencies remain responsible for public warnings. A private satellite company can provide useful data, but agencies need stable access, clear quality checks, and a plan for service problems. Poorer regions should not receive better warnings only when they can pay a high price.
DeepSky is a serious design because it connects several proven ways to measure the atmosphere. The next evidence should come from instruments in orbit, outside forecast tests, warning-time results, and clear access terms. Until then, the architecture is promising, not proven.
Sources
Every fact in this story comes from the sources below. Open them to check our work.
- 1Primary source · September 10, 2026DeepSky: The Early Warning Constellation, and The Five Instruments it Will Carry Tomorrow.io
- 2
We used Tomorrow.io’s technical article for the instruments, present fleet, and stated limits. We used Axios to check the announcement and add outside caution about unproven warning gains. We label the five-billion figure as a company estimate, as Tomorrow.io does.