Why A=2 and B=1 in the call signs for Spirit and Opportunity?Why were the Voyager spacecraft numbered “out-of-order”?Why were Spirit and Opportunity separate launches?Why does Curiosity use an RTG rather than solar (as Spirit and Opportunity do) for power?What software language was used to program the martian rovers Spirit, Opportunity and Curiosity?Can either Opportunity or Curiosity explore the state of Spirit?Which images were used primarily for navigation algorithms on the Spirit rover?Camera costings for Opportunity/Spirit/Curiosity roversWhat was the last message to Opportunity today (13 Feb '19)?How did NASA's Deep Space Network encode and broadcast music to Opportunity?Why do most space probes survive for far longer than they were designed for?What was the last message Opportunity sent?Opportunity's last tau was 10.8; what does that mean and how is tau defined and measured?
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Why A=2 and B=1 in the call signs for Spirit and Opportunity?
Why were the Voyager spacecraft numbered “out-of-order”?Why were Spirit and Opportunity separate launches?Why does Curiosity use an RTG rather than solar (as Spirit and Opportunity do) for power?What software language was used to program the martian rovers Spirit, Opportunity and Curiosity?Can either Opportunity or Curiosity explore the state of Spirit?Which images were used primarily for navigation algorithms on the Spirit rover?Camera costings for Opportunity/Spirit/Curiosity roversWhat was the last message to Opportunity today (13 Feb '19)?How did NASA's Deep Space Network encode and broadcast music to Opportunity?Why do most space probes survive for far longer than they were designed for?What was the last message Opportunity sent?Opportunity's last tau was 10.8; what does that mean and how is tau defined and measured?
$begingroup$
The Martian rover Spirit held the call signs MER-A and MER-2. Opportunity was called MER-B and MER-1. The assignment A=2 seems backwards; logic would suggest A=1. Why is this so?
Based on comments in a previous question, answered by @MarkAdler. Here it is as a proper question.
opportunity spirit mars-exploration-rover
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
$endgroup$
add a comment |
$begingroup$
The Martian rover Spirit held the call signs MER-A and MER-2. Opportunity was called MER-B and MER-1. The assignment A=2 seems backwards; logic would suggest A=1. Why is this so?
Based on comments in a previous question, answered by @MarkAdler. Here it is as a proper question.
opportunity spirit mars-exploration-rover
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
$endgroup$
3
$begingroup$
This is a nice way to convert that comment to a proper FAQ, thanks for doing it.
$endgroup$
– Polygnome
May 20 at 6:58
add a comment |
$begingroup$
The Martian rover Spirit held the call signs MER-A and MER-2. Opportunity was called MER-B and MER-1. The assignment A=2 seems backwards; logic would suggest A=1. Why is this so?
Based on comments in a previous question, answered by @MarkAdler. Here it is as a proper question.
opportunity spirit mars-exploration-rover
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
$endgroup$
The Martian rover Spirit held the call signs MER-A and MER-2. Opportunity was called MER-B and MER-1. The assignment A=2 seems backwards; logic would suggest A=1. Why is this so?
Based on comments in a previous question, answered by @MarkAdler. Here it is as a proper question.
opportunity spirit mars-exploration-rover
opportunity spirit mars-exploration-rover
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
edited May 20 at 2:02
DrSheldon
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
asked May 20 at 1:41
DrSheldonDrSheldon
7,34922768
7,34922768
3
$begingroup$
This is a nice way to convert that comment to a proper FAQ, thanks for doing it.
$endgroup$
– Polygnome
May 20 at 6:58
add a comment |
3
$begingroup$
This is a nice way to convert that comment to a proper FAQ, thanks for doing it.
$endgroup$
– Polygnome
May 20 at 6:58
3
3
$begingroup$
This is a nice way to convert that comment to a proper FAQ, thanks for doing it.
$endgroup$
– Polygnome
May 20 at 6:58
$begingroup$
This is a nice way to convert that comment to a proper FAQ, thanks for doing it.
$endgroup$
– Polygnome
May 20 at 6:58
add a comment |
1 Answer
1
active
oldest
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$begingroup$
On MER we numbered the builds, but used letters for the launches. So MER-1 was built before MER-2. MER-A would both launch and arrive first, and MER-B would launch and arrive second. When we started, we weren't sure which hardware would launch first. Due to how the design testing split across the two flight units was arranged, it turned out that MER-2 became MER-A (Spirit), and MER-1 became MER-B (Opportunity).
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
$endgroup$
add a comment |
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1 Answer
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$begingroup$
On MER we numbered the builds, but used letters for the launches. So MER-1 was built before MER-2. MER-A would both launch and arrive first, and MER-B would launch and arrive second. When we started, we weren't sure which hardware would launch first. Due to how the design testing split across the two flight units was arranged, it turned out that MER-2 became MER-A (Spirit), and MER-1 became MER-B (Opportunity).
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
$endgroup$
add a comment |
$begingroup$
On MER we numbered the builds, but used letters for the launches. So MER-1 was built before MER-2. MER-A would both launch and arrive first, and MER-B would launch and arrive second. When we started, we weren't sure which hardware would launch first. Due to how the design testing split across the two flight units was arranged, it turned out that MER-2 became MER-A (Spirit), and MER-1 became MER-B (Opportunity).
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
$endgroup$
add a comment |
$begingroup$
On MER we numbered the builds, but used letters for the launches. So MER-1 was built before MER-2. MER-A would both launch and arrive first, and MER-B would launch and arrive second. When we started, we weren't sure which hardware would launch first. Due to how the design testing split across the two flight units was arranged, it turned out that MER-2 became MER-A (Spirit), and MER-1 became MER-B (Opportunity).
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
$endgroup$
On MER we numbered the builds, but used letters for the launches. So MER-1 was built before MER-2. MER-A would both launch and arrive first, and MER-B would launch and arrive second. When we started, we weren't sure which hardware would launch first. Due to how the design testing split across the two flight units was arranged, it turned out that MER-2 became MER-A (Spirit), and MER-1 became MER-B (Opportunity).
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
answered May 20 at 4:16
Mark AdlerMark Adler
51.3k3134216
51.3k3134216
add a comment |
add a comment |
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This is a nice way to convert that comment to a proper FAQ, thanks for doing it.
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– Polygnome
May 20 at 6:58