Saturday , January 29 2022

CRS-16 Dragon resigns from ISS before return – NASASpaceFlight.com



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SpaceX CRS-16 The Dragon spacecraft is now part of the mission's EOM (End of Mission) phase, when the International Space Station (ISS) was launched on Sunday. The dragon was released from the space station remote manipulator system (SSRMS), which took place at 11:00 AM. 11:33 PM UTC, Monday at 12:00

The conclusion of the dragon mission was expected earlier this week. However, ISS managers have chosen to delay EOM events until Sunday due to bad weather in the splasdown area.

The CRS-16 Dragon was launched at the Falcon 9 B1050.1 in December. The launch was successful, but the amplifier failed to unload Canaveral Cape LZ-1 because of network defects when the burning phase lost control after the recording.

Despite the spin, the amplifier was still able to stop the water discharge, and after a few days it was towed back to Canaveral. It is not clear whether the amplifier will fly again, but it is unlikely that it will be restored to the customer's flight. Elons Musks was intimate and could be used in some future internal test flights.

The capsule contains 1,598 kilograms (3,523 lb) of cargo unloaded by astronauts on the spacecraft, while the trunk has an additional load to attach the outside of the ISS to critical vehicle systems, including Dragon's two solar blocks. Capsule is the only part of the Dragon that is being recovered; The trunk is down and burns when it returns to the Earth's atmosphere.

When Dragon arrived at ISS, the spacecraft provided many cargoes with pressure loads, including 304 kilograms (670 lb) of reserve crew, 191 kilograms (421 lb) of hardware for US and international station segments and 11 kilograms (24 lb) for the Russian segment, 40 kilograms ( 88 lb) hardware, 15 kg (33 lb) hardware to support space and 1037 kilograms of scientific equipment and new experiments.

Dragon's Trunk was two loads to be installed outside the space station. The Global Ecosystem Dynamics Research (GEDI) will use a laser to study the three-dimensional structure of features on the Earth's surface, such as forests, snow packs and glaciers. The GEDI consists of a LIDAR instrument that will use light pulse reflection to create a surface elevation profile. The instrument was installed on the Japanese Experimental Module Kibo (JEM-EF).

Before returning, the dragon was filled with landing and the hatch closed. The robot ground controller then used the robot to separate the Dragon from the Harmony module on the ground to guide Dragon to the release position.

The dragon was released from SSRMS at. 11:33 PM UTC.

When LEE Traps were released, SSRMS was canceled from Dragon because the ship was in the position at a 10-meter mark.

After leaving the station's arm at a safe distance, Dragon carried out a series of three small-sized burner-off fire burns that move the capsule down the R-band (radial vector) and away from the International Space Station to Earth (looking at ISS orientation and Dragon movements). the Earth).

At the initial departure stage, Dragon led his computer program, station crew and controllers of the Texas Mission Control Houston, NASA with primary control over the spacecraft.

As the Dragon pushes the R-bar, the largest of the three outflow outflows leads to a sufficient Delta Velocity (Delta-V) shift to the Dragon to direct it out of the ellipsoid approach.

ISS Departure Zone

Ellipsoid is 4 km from 2 km oval around the International Space Station, which stretches 2 km from the ISS and 2 km behind the ISS along the speed vector (V-bar) and 1 km above and 1 km above and 1 km below it. Station along the R-bar.

After the Dragon set 1 km below the ISS, the ellipsoid, the main vehicle was moved from NASA to SpaceX controllers in Hawthorne, California.

The dragon will take several hours of free flight as the controller in the mission control space SpaceX will prepare the vehicle for the end of its mission.

This includes a shut-off control navigation and control (GNC) hatch door to the Dragon, creating a perfect thermal seal throughout the Dragon Arrival.

SpaceX Flight Controller in Hawthorne, California, orders Dragon's Draco tractors to be deleted in 12 minutes and 53 seconds in retrograde – deorbit burn, allowing the Dragon to roll out of orbit to return to Earth.

After the deorbit burning, the poor between the Dragon and her outer load rack will be separated before the trunk is separated from the Dragon itself.

The dragon then places his heat shield in front of the entrance interface (EI) – the moment when Dragon reached the foot of the first Earth's upper atmosphere.

Re-importing a Dragon using SpaceX

As soon as EI takes place, Dragon's Thermal Protection System (TPS) protects it from the hot temperatures that have recurred because the air molecules around Dragon are immediately warmed up and converted to plasma below Dragon's high speed.

The Dragon's primary heat shield, PICA-X, is based on a patented version of NASA's Phenol Impregnated Carbon Ablator (PICA) and is designed to protect dragons during re-entry.

PICA-X is powerful enough to protect Dragon not only during ISS return missions, but also during high-speed return from Lunar and Mars destinations.

Unlike the Dragon Capsule, the Dragon vessel burns destructively in the Earth's atmosphere.

After a safe return to the plasma stage, dragon dragon parachutes will be used, followed by the main parachutes designed to recover the vehicle in the Pacific Ocean.

Dragon splashdown

The recovery is provided by three major recovery vessels near the Dragon's return point. The main recovery vehicle had already sailed this week.

Rapidly recoverable vessels to begin collecting Dragon's parachutes, as the recovery of the capsule will be performed by primary recovery assets.

The dragon paratroopers, who help to miss, will take 410 miles southwest of Long Beach, California. It will take about two days for Dragon to return to the port of Los Angeles to unload the cache of cargo and scientific experiments.

The ISS crew spent most of the Dragon Dragon load on the second side with the main items to be returned to the Earth, including many time-sensitive experiments that will be the first to be removed.

Finally, Dragon will go on a trip to the SpaceX Testing Center in Texas, McGregor, to complete the cargo removal.

CRS-17 is the next Dragon mission for ISS, which is currently scheduled for March.

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