Engineering:Progress MS-08

Short description: 2018 Russian resupply spaceflight to the ISS

Progress MS-08

Progress MS-08 approaches the ISS on 15 February 2018
Names	Progress 69P
Mission type	ISS resupply
Operator	Roscosmos
COSPAR ID	2018-019A
SATCAT no.	43211
Mission duration	197 days
Spacecraft properties
Spacecraft	Progress MS-08 s/n 438
Spacecraft type	Progress-MS
Manufacturer	RKK Energia
Launch mass	7430 kg
Payload mass	2494 kg
Start of mission
Launch date	13 February 2018, 08:13:33 UTC
Rocket	Soyuz-2.1a s/n U15000-030
Launch site	Baikonur, Site 31/6
Contractor	Progress Rocket Space Centre
End of mission
Disposal	Deorbited
Decay date	30 August 2018
Orbital parameters
Reference system	Geocentric orbit
Regime	Low Earth orbit
Inclination	51.67°
Docking with ISS
Docking port	Zvezda
Docking date	15 February 2018, 10:38 UTC
Undocking date	23 August 2018, 02:16 UTC
Time docked	188 days
Cargo
Mass	2494 kg
Pressurised	1388 kg
Fuel	640 kg
Gaseous	46 kg
Water	420 kg
Progress ISS Resupply

Progress MS-08 (Russian: Прогресс МC-08), identified by NASA as Progress 69P, was a Progress spaceflight, operated by Roscosmos to resupply the International Space Station (ISS).

History

The Progress-MS is an uncrewed freighter based on the Progress-M featuring improved avionics. This improved variant first launched on 21 December 2015. It has the following improvements:

• New external compartment that enables it to deploy satellites. Each compartment can hold up to four launch containers. First time installed on Progress MS-03.
• Enhanced redundancy thanks to the addition of a backup system of electrical motors for the docking and sealing mechanism.
• Improved Micrometeoroid (MMOD) protection with additional panels in the cargo compartment.
• Luch Russian relay satellites link capabilities enable telemetry and control even when not in direct view of ground radio stations.
• GNSS autonomous navigation enables real time determination of the status vector and orbital parameters dispensing with the need of ground station orbit determination.
• Real time relative navigation thanks to direct radio data exchange capabilities with the space station.
• New digital radio that enables enhanced TV camera view for the docking operations.
• The Ukraine Chezara Kvant-V on board radio system and antenna/feeder system has been replaced with a Unified Command Telemetry System (UCTS).
• Replacement of the Kurs A with Kurs NA digital system.

Launch

Progress MS-08 launched on 13 February 2018 from the Baikonur Cosmodrome in Kazakhstan atop a Soyuz-2.1a rocket, at 08:13:33 UTC.

Docking

Progress MS-08 docked on 15 February 2018 with the aft docking port of the Zvezda module, at 10:38 UTC.

Cargo

The Progress MS-08 spacecraft delivered 2,494 kg of cargo and supplies to the International Space Station. The following is a breakdown of cargo bound for the ISS:

• Dry cargo: 1,390 kg
• Fuel: 890 kg
• Oxygen and Air: 46 kg
• Water: 430 kg

Progress MS-08 also includes two nanosatellites: Tanyusha YuZGU-3 (1998-067PJ) and Tanyusha YuZGU-4 (1998-067PK) (a.k.a. Radioskaf RS-8 and Radioskaf RS-9) with a mass of 2.5 kg, which was developed jointly by RKK Energia and students at the South-Western State University, YuZGU, in the city of Kursk. The satellites will be launched by spacewalking cosmonauts.

Undocking and decay

Undocking on 23 August 2018, at 02:16 UTC. And decay in the atmosphere and its debris entered the Pacific Ocean, on 30 August 2018.