Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4

Name: Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4
Start: 2025-07-25T05:54:04Z
Location: Cosmodrome Site 1S

Soyuz 2.1b Fregat-M launched the Ionosfera-M 3 & 4 mission for Russian Federal Space Agency (ROSCOSMOS) from Vostochny Cosmodrome, Siberia, Russian Federation on Jul 25, 2025 (UTC).

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Launch pad

Cosmodrome Site 1S · Vostochny Cosmodrome, Siberia, Russian Federation

Soyuz 2.1b/Fregat-M | Ionosfera-M 3 & 4

Launched Jul 25, 2025 2:54:04 PMSuccess

20 objects in orbit now

Flight direction

194° SSW

measured from the launched orbit · inclination 98.6°

Flight path

First-stage drop zone (rough estimate)

Drawn 400–700 km downrange along the flight direction. Official hazard areas are published as NOTAMs and navigational warnings.

About 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

Mission description from Launch Library 2.

Objects from this launch still in orbit

Launch time (your time zone): Fri, Jul 25 · 2:54:04 PM
Status: Success
Launch provider: Russian Federal Space Agency (ROSCOSMOS)
Rocket: Soyuz 2.1b Fregat-M
Mission type: Earth Science
Target orbit: SSO
Launch pad: Cosmodrome Site 1S · Vostochny Cosmodrome, Siberia, Russian Federation