Cygnus NG-11 (CRS-11) - Antares 230 - MARS LP-0A - 17.04.2019, 20:46 UTC

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Корабль в зоне AE, 1 км (белая точка справа внизу экрана ближе к центру)

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https://blogs.nasa.gov/spacestation/2019/04/19/nasa-tv-coverage-begins-of-u-s-cygnus-craft-approaching-station/

NASA TV Coverage Begins of U.S. Cygnus Craft Approaching Station

Mark Garcia
Posted Apr 19, 2019 at 4:03 am


Expedition 59 Flight Engineer Anne McClain of NASA uses the robotics workstation inside the U.S. Destiny laboratory module to practice Canadarm2 robotics maneuvers and Cygnus spacecraft capture techniques.

Aboard the International Space Station, Expedition 59 Flight Engineer Anne McClain of NASA will capture the spacecraft assisted by David Saint-Jacques of the Canadian Space Agency, who will monitor Cygnus systems during its approach for capture. They will use the space station's robotic arm to take hold of the Cygnus, dubbed the S.S. Roger Chaffee. After Cygnus' capture, ground controllers will command the station's arm to rotate and install it on the bottom of the station's Unity module.

NASA Television coverage of capture has begun. Watch live online at www.nasa.gov/live

A timeline of remaining Cygnus and space station activities for the earliest capture attempt is below:

[TH]Time (EDT)[/TH][TH]   [/TH][TH]Event[/TH]

4:14 a.m.		Cygnus within 300m of Space Station
4:21 a.m.		250m Hold Point Arrival
4:36 a.m.		250m Hold Point Departure
4:47 a.m.		Cygnus within 100 meters of Space Station
5:00 a.m.		30 meters Hold Point Arrival
5:05 a.m.		Earliest "Go" for Capture
5:19 a.m.		Capture Point Arrival
5:24 a.m.		"Go" or "No-Go" for Capture
5:30 a.m.		Capture

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04/19/2019 11:32 Stephen Clark

The Cygnus spacecraft is currently holding around 250 meters, or 820 feet, beneath the International Space Station. This pause allows mission controllers to evaluate the status of all key systems on both vehicles before clearing Cygnus to approach inside the "keep out sphere," an imaginary bubble stretching 200 meters, or 656 feet, fr om the complex on all sides.

The last major course correction burn, known as ADV3, was completed less than an ago to put Cygnus on track to arrive directly below the space station.

The Cygnus spacecraft is making its automated approach aided by GPS navigation and laser instruments designed to determine the range and closing rate between the cargo ship and the huge 450-ton space station.

The Cygnus first relied on comparing GPS navigation data from its on-board computer and the space station.

After arriving at the hold point about 820 feet directly below the space station, Cygnus will switch to a TriDAR sensor, which uses triangulation and fires light pulses and measures their reflections from the space station to measure the range and closing rate between the two vehicles.

The laser-guided visual navigation system feeds data into the Cygnus guidance computer, telling the spacecraft when and wh ere to fire its rocket jets to maneuver the unmanned freighter to a point 30 feet below the space station.

Once Cygnus arrives at a hold point just below the complex around 5:22 a.m. EDT (0922 GMT), astronaut Anne McClain will take control of the lab's robot arm to reach out and grapple the free-floating Cygnus spacecraft at 5:30 a.m. EDT (0930 GMT).

The robot arm will maneuver the Cygnus spacecraft onto the Unity module's Earth-facing berthing port about two hours later.

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04/19/2019 11:40 Stephen Clark

The Cygnus spacecraft, fitted with a pressurized cargo compartment built by Thales Alenia Space in Italy containing around 3,162 kilograms, or 6,971 pounds, of supplies, is moving toward a hold point 30 meters, or 98 feet, from the space station.


04/19/2019 11:41 Stephen Clark

Range is now 200 meters, or about 656 feet.

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04/19/2019 11:50 Stephen Clark

The Cygnus spacecraft is now about 90 meters, or 295 feet, from the space station.

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30 м HOLD point

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04/19/2019 12:03 Stephen Clark

Cygnus is now holding at a distance of 30 meters, or 98 feet, from the International Space Station. This hold is expected to last around 10 minutes.

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04/19/2019 12:12 Stephen Clark

Cygnus has resumed its approach toward the capture point roughly 33 feet, or 10 meters, below the space station.