Ionosfera-M 3 & 4

Name: Ionosfera-M 3 & 4
Start: 2025-07-25T05:54:04.000Z
End: 2025-07-25T05:54:04.000Z
Location: Cosmodrome Site 1S

Soyuz 2.1b Fregat-M, Russian Federal Space Agency (ROSCOSMOS)

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

Launch time

T-0

Fri 25 Jul, 07:54:04 CEST

05:54:04 UTC

Second precision Launch successful

The rocket put its payload into the planned orbit.

How to read launch times

How sure is this date?

The source gives second precision. Launch plans can change.

Launch record updated by LL2 Sun 27 Jul 2025, 08:21 CEST

Feed checked 11 Oct, 03:42 CEST

Add to calendar

Mission

Ionosfera-M 3 & 4 on Soyuz 2.1b Fregat-M. Fri 25 Jul 2025, 05:54:04 UTC. Reported outcome: Success. Launch site: Cosmodrome Site 1S. Source: Launch Library 2.

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 type: Earth Science
Orbit: Sun-Synchronous Orbit

Soyuz 2.1b liftoff ( Ionosfera-M 1 & 2) — Credit: Roscosmos · Roscosmos terms (non-commercial)

Launch timeline

No timeline has been provided by the source.

Slip history

Changes recorded by Space Right Now

No changes since we started tracking on Sat 10 Oct 2026, 11:16 UTC.

Source updates from Launch Library 2 (7)

Announcements supplied by LL2 may predate our tracking. They are separate from changes observed by Space Right Now.

Fri 25 Jul 2025, 13:40 UTCLL2 update
Launch success.
Read the source update
Fri 25 Jul 2025, 05:54 UTCLL2 update
Liftoff.
Read the source update
Tue 22 Jul 2025, 03:42 UTCLL2 update
Tweaked T-0.
Read the source update
Wed 14 May 2025, 17:04 UTCLL2 update
Added launch time.
Read the source update
Sat 3 May 2025, 19:16 UTCLL2 update
NET July 25.
Read the source update
Wed 2 Apr 2025, 13:55 UTCLL2 update
NET July 24.
Read the source update
Mon 3 Feb 2025, 18:36 UTCLL2 update
Added launch.
Read the source update

Launch pad

Cosmodrome Site 1S

Vostochny Cosmodrome, Siberia, Russian Federation (RU)

Coordinates: 51.884395, 128.333932

View launch pad on a map