All launches

Ionosfera-M 3 & 4

Soyuz 2.1b Fregat-MRussian Federal Space Agency (ROSCOSMOS)Cosmodrome Site 1S
Friday, July 25, 2025 · 05:54 AM UTC
Mission brief

The mission

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

PayloadIonosfera-M 3 & 4
OrbitSSO
CustomerRussian Federal Space Agency (ROSCOSMOS)
Stages4
PadCosmodrome Site 1S, Vostochny Cosmodrome, Siberia, Russian Federation
Flight plan

Mission timeline

14 / 14100%
The range

Where it leaves Earth

Launch site

Ground vector

Site locked

Cosmodrome Site 1S

Vostochny Cosmodrome, Siberia, Russian Federation

Global range
SITE LOCK
Latitude
51.884°N
Longitude
128.334°E

Can I see this?

Distance and a plain visibility call from a place you choose. Trajectory is not modeled — night launches travel farther across the sky than daylight ones.

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Range weather

Launch commit criteria

Clear
Watch
TrackingNo active constraints
Weather rules

Clear — tracking no weather issues at this time.

Primary concern
No weather issues
Rule count
0
Temperature
Not reported
Surface wind
Not reported
Window

05:54 AM UTC – 05:54 AM UTC

Hardware

Vehicle & provider

Vehicle

Soyuz 2.1b Fregat-M

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Height46.3 m
LEO Payload8,200 kg
Launches342
Successes331
Provider

Russian Federal Space Agency (ROSCOSMOS)

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RUS • Founded 1992

Reliability

Schedule history

No meaningful launch-time or status changes recorded.