What is crossrange and downrange for an entry vehicle?
Clash Royale CLAN TAG#URR8PPP
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I have been searching the terms online but still can't get a more intuitive understanding. If you could refer me to some website, book or if you could offer me an explanation I would really appreciate it!
Thanks!
reentry entry-descent-landing
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
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add a comment |
$begingroup$
I have been searching the terms online but still can't get a more intuitive understanding. If you could refer me to some website, book or if you could offer me an explanation I would really appreciate it!
Thanks!
reentry entry-descent-landing
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
$endgroup$
add a comment |
$begingroup$
I have been searching the terms online but still can't get a more intuitive understanding. If you could refer me to some website, book or if you could offer me an explanation I would really appreciate it!
Thanks!
reentry entry-descent-landing
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
$endgroup$
I have been searching the terms online but still can't get a more intuitive understanding. If you could refer me to some website, book or if you could offer me an explanation I would really appreciate it!
Thanks!
reentry entry-descent-landing
reentry entry-descent-landing
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
asked Feb 10 at 19:18
dareToDiffer07dareToDiffer07
332
332
add a comment |
add a comment |
1 Answer
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Downrange is the distance traveled in the direction of flight. Imagine the orbit of a spacecraft as a circle around the Earth, 'downrange' is the distance traveled along this path. When you do a ballistic (uncontrolled) reentry, this is the path you travel.
Crossrange comes into play when you make a turn, and you deviate from your orbit. It's the distance between the spacecraft and the path of its original orbit.
My own image, it's a top view of the original orbit and the effect of making a turn early in the reentry trajectory.
The Shuttle was capable of a large crossrange distance on reentry: they wanted to be able to land ~2000 km away from the orbital path. This meant they could launch from Vandenberg in California into a polar orbit, make 1 orbit and then land back in California. That 1 orbit took 90 minutes, in which the Earth rotated by ~2000 km, so a downrange landing would put the Shuttle in the Pacific, 2000 km off the West coast.
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
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IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
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– GdD
Feb 11 at 9:07
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Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
add a comment |
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1 Answer
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1 Answer
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$begingroup$
Downrange is the distance traveled in the direction of flight. Imagine the orbit of a spacecraft as a circle around the Earth, 'downrange' is the distance traveled along this path. When you do a ballistic (uncontrolled) reentry, this is the path you travel.
Crossrange comes into play when you make a turn, and you deviate from your orbit. It's the distance between the spacecraft and the path of its original orbit.
My own image, it's a top view of the original orbit and the effect of making a turn early in the reentry trajectory.
The Shuttle was capable of a large crossrange distance on reentry: they wanted to be able to land ~2000 km away from the orbital path. This meant they could launch from Vandenberg in California into a polar orbit, make 1 orbit and then land back in California. That 1 orbit took 90 minutes, in which the Earth rotated by ~2000 km, so a downrange landing would put the Shuttle in the Pacific, 2000 km off the West coast.
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
$endgroup$
$begingroup$
IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
$endgroup$
– GdD
Feb 11 at 9:07
$begingroup$
Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
add a comment |
$begingroup$
Downrange is the distance traveled in the direction of flight. Imagine the orbit of a spacecraft as a circle around the Earth, 'downrange' is the distance traveled along this path. When you do a ballistic (uncontrolled) reentry, this is the path you travel.
Crossrange comes into play when you make a turn, and you deviate from your orbit. It's the distance between the spacecraft and the path of its original orbit.
My own image, it's a top view of the original orbit and the effect of making a turn early in the reentry trajectory.
The Shuttle was capable of a large crossrange distance on reentry: they wanted to be able to land ~2000 km away from the orbital path. This meant they could launch from Vandenberg in California into a polar orbit, make 1 orbit and then land back in California. That 1 orbit took 90 minutes, in which the Earth rotated by ~2000 km, so a downrange landing would put the Shuttle in the Pacific, 2000 km off the West coast.
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
$endgroup$
$begingroup$
IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
$endgroup$
– GdD
Feb 11 at 9:07
$begingroup$
Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
add a comment |
$begingroup$
Downrange is the distance traveled in the direction of flight. Imagine the orbit of a spacecraft as a circle around the Earth, 'downrange' is the distance traveled along this path. When you do a ballistic (uncontrolled) reentry, this is the path you travel.
Crossrange comes into play when you make a turn, and you deviate from your orbit. It's the distance between the spacecraft and the path of its original orbit.
My own image, it's a top view of the original orbit and the effect of making a turn early in the reentry trajectory.
The Shuttle was capable of a large crossrange distance on reentry: they wanted to be able to land ~2000 km away from the orbital path. This meant they could launch from Vandenberg in California into a polar orbit, make 1 orbit and then land back in California. That 1 orbit took 90 minutes, in which the Earth rotated by ~2000 km, so a downrange landing would put the Shuttle in the Pacific, 2000 km off the West coast.
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
$endgroup$
Downrange is the distance traveled in the direction of flight. Imagine the orbit of a spacecraft as a circle around the Earth, 'downrange' is the distance traveled along this path. When you do a ballistic (uncontrolled) reentry, this is the path you travel.
Crossrange comes into play when you make a turn, and you deviate from your orbit. It's the distance between the spacecraft and the path of its original orbit.
My own image, it's a top view of the original orbit and the effect of making a turn early in the reentry trajectory.
The Shuttle was capable of a large crossrange distance on reentry: they wanted to be able to land ~2000 km away from the orbital path. This meant they could launch from Vandenberg in California into a polar orbit, make 1 orbit and then land back in California. That 1 orbit took 90 minutes, in which the Earth rotated by ~2000 km, so a downrange landing would put the Shuttle in the Pacific, 2000 km off the West coast.
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
answered Feb 10 at 19:54
HobbesHobbes
92.8k2258413
92.8k2258413
$begingroup$
IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
$endgroup$
– GdD
Feb 11 at 9:07
$begingroup$
Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
add a comment |
$begingroup$
IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
$endgroup$
– GdD
Feb 11 at 9:07
$begingroup$
Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
$begingroup$
IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
$endgroup$
– GdD
Feb 11 at 9:07
$begingroup$
IIRC, the crossrange capability was a USAF requirement as they were going to buy some shuttles too. Then they didn't and NASA was stuck with the design.
$endgroup$
– GdD
Feb 11 at 9:07
$begingroup$
Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
$begingroup$
Thank you very much! Your explanation and the paper helped me a lot!
$endgroup$
– dareToDiffer07
Feb 11 at 13:34
add a comment |
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