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Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4
Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4 launched on Fri, Jul 25, 2025, 05:54 AM UTC — a Russian Federal Space Agency (ROSCOSMOS) mission.
Launch SuccessfulRussian Federal Space Agency (ROSCOSMOS)
Lifted offNET Jul 2025
NET Fri, Jul 25, 2025, 05:54 AM UTC
Live coverage
Watch the webcast
Mission profile
The flight at a glance
Soyuz 2.1b/Fregat-MVehicle
Russian Federal Space Agency (ROSCOSMOS)Provider
Cosmodrome Site 1SPad
Vostochny Cosmodrome, Siberia, Russian FederationLocation
Earth ScienceMission type
Sun-Synchronous OrbitOrbit
Flight simulation
Ascent to orbit
A representative gravity-turn climb for Soyuz 2.1b/Fregat-M to Sun-Synchronous Orbit. Illustrative model — not this mission’s live telemetry.
Mission timeT+0:00
Altitude0.0 km
Velocity0.00 km/s
PhaseLiftoff
T+0:00 / 8:50
SimulatedRepresentative Soyuz 2.1b/Fregat-M ascent profile — illustrative model, not this mission’s live telemetry.
The mission
Ionosfera-M 3 & 4
Ionosfera is a constellation of four ionospheric and magnetospheric research satellites developed by for Roscosmos for the project Ionozond. The satellites will operate on circular sun-synchronous orbits (SSO), at altitude of about 800 km and located in two orbital planes of two satellites each. The following science instruments are carried on the satellites: * SPER/1 Plasma and energy radiation spectrometer * SG/1 Gamma-ray spectrometer * GALS/1 Galactic cosmic ray spectrometer / 1 * LAERTES On-board Ionosonde * NBK/2 Low-frequency wave complex * ESEP Ionospheric plasma energy spectrometer * Ozonometer-TM Ozonometer * MayaK On-board radio transmitters * PES GPS-GLONASS device
Around this launch
Related news
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As coverage publishes, deduplicated articles about this mission will appear here.
Good to know
Frequently asked
What time does Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4 launch?
Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4 is scheduled to lift off Fri, Jul 25, 2025, 05:54 AM UTC.
Where can I watch Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4?
Watch the official live webcast embedded on this page — it goes live shortly before liftoff.
Who is launching Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4?
Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4 is an Russian Federal Space Agency (ROSCOSMOS) mission flying on a Soyuz 2.1b/Fregat-M.
Where does Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4 launch from?
It lifts off from Cosmodrome Site 1S, Vostochny Cosmodrome, Siberia, Russian Federation.