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HTV 4 rendezvous timeline
SPACEFLIGHT NOW
Posted: August 8, 2013

NOTE: GMT is 4 hours ahead of Eastern Daylight Time. Times are subject to change.

Aug. 9 Height Adjustment Maneuver 0
0137 GMT - A height adjustment maneuver, called HAM 0, will raise the HTV's altitude by changing the ship's velocity by 2.5 meters per second, or about 5 mph. This burn puts the spacecraft in an orbit about 5 kilometers, or 3 miles, below the International Space Station.
Aug. 9 Establish Proximity Communications
The HTV establishes a proximity communications link with the space station when it passes within about 23 kilometers, or 14.3 miles, of the complex.
Aug. 9 Height Adjustment Maneuver 2
0443 GMT - Another major rendezvous maneuver will place the HTV about 5 kilometers, or 3 miles, behind the space station on the minus V-bar.
Aug. 9 Approach Initiation Point
0805 GMT - The HTV departs the approach initiation point about 5 kilometers, or 3.1 miles, behind the space station. This is the starting point for the final rendezvous and approach sequence. The HTV will fly to a rendezvous insertion point around 500 meters, or 1,640 feet, directly below the station along the minus R-bar.
Aug. 9 Rendezvous Insertion Point
0908 GMT - The HTV arrives at the rendezvous insertion point about 500 meters, or 1,640 feet, directly below the station along the minus R-bar. The ship will soon switch navigation sources from relative GPS to a rendezvous laser radar for the final approach.
Aug. 9 250 Meter Hold Point Arrival
0929 GMT - Arriving at a programmed hold point 250 meters, or about 820 feet, below the station, the HTV pauses to conduct a "yaw around" maneuver position the ship for potential contingency abort maneuvers.

After about 35 minutes of stationkeeping, the HTV resumes its approach to the station.

Aug. 9 250 Meter Hold Point Departure
1004 GMT - After ground controllers analyze its health and performance, the HTV leaves the hold point to continue its approach to the station.
Aug. 9 30 Meter Hold Point Arrival
1033 GMT - The HTV stops at a point 30 meters, or 98 feet, below the space station. This is the final hold point to check the spacecraft's alignment and systems before entering the capture box.
Aug. 9 30 Meter Hold Point Departure
1053 GMT - Flight controllers instruct the HTV to leave the 30 meter point and fly to a capture box about 9 meters, or 30 feet, below the space station's Kibo laboratory module.
Aug. 9 Sunrise
1054 GMT - The International Space Station moves into the daylight portion of its orbit.
Aug. 9 Capture Point
1114 GMT - The HTV reaches a capture box about 9 meters, or 30 feet, directly below the station.
Aug. 9 Capture
1129 GMT - The station's robot arm, operated by astronaut Cady Coleman, grapples the HTV as the craft hovers about 9 meters, or 30 feet, below the complex's Kibo module.
Aug. 9 Sunset
1203 GMT - The International Space Station moves into the night portion of its orbit.

Data Source: JAXA and NASA

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