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Questions tagged [launch-window]

Questions regarding the limited period of time where a specific mission plan can be used.

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7 votes
1 answer
737 views

How could the landing date of Perseverance Rover be fixed irrespective of 26 days launch window?

I am very much aware of this question from 2018 by @uhoh - Why would InSight's arrival date at Mars be fixed, and independent of the launch date?. I was led here by a similar question which arose in ...
OrangeDurito's user avatar
19 votes
1 answer
1k views

Why was TESS' launch window open for only 40 seconds per day?

The BBC news podcast Science in Action episode New Planet Hunting Mission covers the upcoming TESS mission between 01:00 and 07:15 with Sara Seager, TESS deputy ...
uhoh's user avatar
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15 votes
2 answers
3k views

What's the reasonable "window" in days for a Mars-Earth Hohmann transfer?

As any popular science reader knows, when traveling between Earth and Mars, there's a Hohmann transfer opportunity about every two years (I believe it's every 26 months, specifically). What I've ...
Fattie's user avatar
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10 votes
1 answer
718 views

Do geosynchronous satellite launches require a tight launch window?

I thought only launches to rendezvous (resupply, repair, space station expansion etc) and direct launches into interplanetary trajectory require precisely timed launch window. Then I read: Geosync ...
SF.'s user avatar
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8 votes
0 answers
143 views

Are "launch-on-minute" or other discrete launch times protocols currently the norm for wide launch windows?

This excellent answer to a question about collision avoidance practices for launches begins with: While the length of a launch window varies, launches within the window typically occur at discrete ...
uhoh's user avatar
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7 votes
3 answers
355 views

Can Falcon 9 be fueled slowed to delay the instantaneous launch window?

DM-2's first launch attempt was scrubbed at about T−17 minutes due to bad weather at the instantaneous launch window, even though the weather was predicted to clear up as early as T+10. It was ...
Adám's user avatar
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7 votes
1 answer
397 views

What factors determine how long a window of opportunity opens for an interplanetary hohmann transfer?

I know that one can determine the approximate wait time for a window of opportunity to open up for an interplanetary transfer based on the relative positions and velocities of the two planets in ...
Paul's user avatar
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