Progress MS
Прогресс МС

Progress MS-11 approaching the ISS
Manufacturer	Energia
Country of origin	Russia
Operator	Roscosmos
Applications	ISS resupply
Specifications
Spacecraft type	Cargo
Launch mass	7,290 kg (16,070 lb)
Payload capacity	Total: 2,600 kg (5,700 lb)      Dry cargo: 1,800 kg (4,000 lb)      Propellant: 870 kg (1,920 lb)      Water: 420 kg (930 lb)      Gases: 50 kg (110 lb) Disposal: 2,140 kg (4,720 lb)
Volume	7 m3 (250 cu ft)
Regime	Low Earth orbit
Design life	180 days docked to aspace station[a]
Production
Status	Active
On order	8
Built	29
Launched	29 (as of 11 September 2024)
Operational	2 (MS-28,MS-29)
Retired	26
Lost	1 (MS‑04)
Maiden launch	21 December 2015 (MS-01)
Last launch	Active
Related spacecraft
Derived from	Progress M
Flown with	Soyuz-2.1a (2015–) Soyuz-U (2016–2017) Soyuz-FG (2018–2019)

TheProgress MS (Russian:Прогресс МС;GRAU: 11F615A61) is the latest version of the RussianProgress spacecraft series, first launched in 2015. The "MS" stands for "modernized systems," reflecting upgrades primarily focused on the communications and navigation subsystems. An evolution of theProgress M spacecraft, the Soyuz MS features minimal external changes, mainly in the placement of antennas, sensors, and thrusters. It is used byRoscosmos forcargo spaceflight missions.Progress MS-01 conducted its maiden flight on 21 December 2015, heading to theInternational Space Station (ISS).

Like all previous variants, the Progress MS spacecraft consists of three distinct sections:^[1]

• Cargo Section: This pressurized carries supplies for the crew, including maintenance items, prepackaged and fresh food, scientific equipment, and clothing. Its docking drogue, similar to that of the Soyuz, features ducting that enables fuel transfer (described below).
• Tanker Section: Replacing the Soyuz's reentry module, this unpressurized compartment houses two tanks containingunsymmetrical dimethylhydrazine (UDMH) fuel anddinitrogen tetroxide (N₂O₄) oxidizer. Ducts run from these tanks around the outside of the pressurized module to connectors at the docking port, allowing automated fuel transfer. This design prevents any potential leaks of the toxic propellant from contaminating the station's atmosphere. This section also contains water tanks.
• Propulsion Section: Located at the rear of the spacecraft, this unpressurized compartment remains largely unchanged from the Soyuz design. It contains the orientation engines used for automatic docking and can be utilized to boost the station's orbit once docked.

The Progress spacecraft's uncrewed and disposable design enables significant weight reduction. Unlike Soyuz, it does not require life support systems, heat shields, parachutes, or automatic crew rescue systems. Additionally, it lacks the ability to separate into multiple modules. after completing its mission, the spacecraft undocks, performs a controlled retrofire, and burns up upon reentry into Earth's atmosphere.

Technical specifications^[2]

• Launch mass: 7,290 kilograms (16,070 lb)
• Total payload capacity at launch: 2,600 kilograms (5,700 lb) – the following amounts exceed this capacity, giving planners the ability to match the payload to the needs of the station
  • Dry cargo (in cargo section): Up to 1,800 kilograms (4,000 lb)
  • Propellant: Up to 870 kilograms (1,920 lb)
  • Water: Up to 420 kilograms (930 lb)
  • Gases: Up to 50 kilograms (110 lb)
• Total payload capacity (in cargo section) for disposal: 2,140 kilograms (4,720 lb)

The Progress MS received the following upgrades with compared to theProgress M:^[2][3][4][5]

• New flight control system (SUD): Instead of relying only on six ground stations to determine its orbital path, the new SUD flight control system will also use signals fromGLONASS navigation satellites.
• New Kurs-NA rendezvous system: The newKurs-NA (Russian:Курс-Новая Активная,romanized: Kurs-Novaya Aktivnaya,lit. 'Course-New Active') automatic docking system is designed and manufactured in Russia, replacing its Ukrainian predecessor. This change addresses a political problem (with the two countries at war) and enhances the system's capabilities with a higher level of computerization. While the original Kurs system was highly reliable over the years, many of its electronic components have become outdated. The Kurs-NA is 25 kg (55 lb) lighter, 30% smaller, and consumes 25% less power. Additionally, it features a singlephased-array antenna, replacing four antennas on the older system, while the two narrow-angle antennas have been retained although re-positioned further toward the rear. To assist with docking, the old halogen headlight has been replaced with a brighter, more energy-efficient LED light.^[6][7]
• Unified Command and Telemetry System (EKTS, Russian:Единая Командно-Телеметрическая Система,romanized: Edinaya Komandno-Telemetricheskaya Sistema): Instead of solely relying on ground stations in Russian territory, the spacecraft has a satellite-capable communications system, EKTS, that connects to Russia'sLuch system, providing coverage 83 percent of the day. It also retainsvery high frequency (VHF) andultra high frequency (UHF) radios for communications with ground stations. The large EKTSS-band satellite antenna array, one of the most prominent new features on the ship's exterior, is also capable of communicating via AmericanTDRS and Europe'sEDRS satellites. The EKTS integrates several previous systems, including the BRTS (radio), MBITS (telemetry), and Rassvet (radio voice), which have been replaced or upgraded for compatibility. Additionally, it features aCOSPAS-SARSAT transponder for real-time location tracking during reentry and landing. These changes enable the Soyuz to use the sameground segment terminals as theRussian Segment of theISS.^[8]
• Additional micro-meteoroid protection: Additional anti-micro-meteoroid shielding was added to the cargo section module walls. This measure was designed to safeguard the spacecraft's most vulnerable component against the unlikely but potential threat of a meteoroid or space debris impact.
• Improved docking mechanism: Thedocking system received a backup electric driving mechanism.^[9]
• Digital camera system: The spacecraft utilizes a digital television camera system based onMPEG-2, replacing the older analog system. This upgrade enables space-to-space RF communication between the spacecraft and the station and reduces interference.
• CubeSat deployment platform: New external compartment that enables it to deployCubeSats. Each compartment can hold up to four launch containers. First time installed onProgress MS-03.

• The Progress MS spacecraft (RussianSpaceWeb.com)

• Progress (spacecraft)

• CS1 Russian-language sources (ru)
• Articles with short description
• Short description is different from Wikidata
• Use British English from October 2020
• Use dmy dates from November 2024
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