Why A=2 and B=1 in the call signs for Spirit and Opportunity?Why were the Voyager spacecraft numbered “out-of-order”?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?
Why A=2 and B=1 in the call signs for Spirit and Opportunity?
How to test if argument is a single space?
mmap: effect of other processes writing to a file previously mapped read-only
Can the Conjure Barrage spell stack with the Disarming Attack or Trip Attack Battle Master maneuvers?
VHDL: Why is it hard to design a floating point unit in hardware?
why "American-born", not "America-born"?
To exponential digit growth and beyond!
How many wires should be in a new thermostat cable?
Is being an extrovert a necessary condition to be a manager?
A nasty indefinite integral
Real Analysis: Proof of the equivalent definitions of the derivative.
How to eliminate gap at the start and at the end of a line when it's drawn along a side of a node's bounding box?
How would a physicist explain this starship engine?
Which values for voltage divider
How to become an Editorial board member?
What is this dime sized black bug with white on the segments near Loveland Colorodao?
Does the fact that we can only measure the two-way speed of light undermine the axiom of invariance?
Variable does not Exist: CaseTrigger
Are there any tips to help hummingbirds find a new feeder?
Proto-Indo-European (PIE) words with IPA
Why do the i8080 I/O instructions take a byte-sized operand to determine the port?
How could the B-29 bomber back up under its own power?
Ratings matrix plot
Is it safe to redirect stdout and stderr to the same file without file descriptor copies?
Why A=2 and B=1 in the call signs for Spirit and Opportunity?
Why were the Voyager spacecraft numbered “out-of-order”?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 3 hours ago
Dr SheldonDr Sheldon
6,88822464
$endgroup$
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 3 hours ago
Dr SheldonDr Sheldon
6,88822464
$endgroup$
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 3 hours ago
Dr SheldonDr Sheldon
6,88822464
$endgroup$
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 3 hours ago
Dr SheldonDr Sheldon
6,88822464
asked 3 hours ago
Dr SheldonDr Sheldon
6,88822464
edited 3 hours ago
Dr Sheldon
asked 3 hours ago
Dr SheldonDr Sheldon
6,88822464
asked 3 hours ago
Dr SheldonDr Sheldon
6,88822464
asked 3 hours ago
Dr SheldonDr Sheldon
6,88822464
6,88822464
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
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 53 mins ago
Mark AdlerMark Adler
51k3131215
$endgroup$
add a comment |
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "508"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f36286%2fwhy-a-2-and-b-1-in-the-call-signs-for-spirit-and-opportunity%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
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 53 mins ago
Mark AdlerMark Adler
51k3131215
$endgroup$
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 53 mins ago
Mark AdlerMark Adler
51k3131215
$endgroup$
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 53 mins ago
Mark AdlerMark Adler
51k3131215
$endgroup$
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 53 mins ago
Mark AdlerMark Adler
51k3131215
answered 53 mins ago
Mark AdlerMark Adler
51k3131215
answered 53 mins ago
Mark AdlerMark Adler
51k3131215
answered 53 mins ago
Mark AdlerMark Adler
51k3131215
51k3131215
add a comment |
add a comment |
Thanks for contributing an answer to Space Exploration Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f36286%2fwhy-a-2-and-b-1-in-the-call-signs-for-spirit-and-opportunity%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
