Talk:Mariner 9

Current location?

Where is this probe now? Is it still in Mars orbit?

Yes, it is still in Mars orbit, it's orbit is stable until at least 2022.

Where did that fact come from? Andy120290 22:13, 22 October 2006 (UTC)

I don't know, but the German website Astronews.com claims it is and will stay in orbit until entering the Martian atmosphere probably in "the next decade". --Roentgenium111 (talk) 14:13, 28 February 2012 (UTC)

Found a source. --Roentgenium111 (talk) 14:27, 28 February 2012 (UTC)

Photos attributed to Mariner 9 are incorrect

The photos of Scamander Vallis and Warrego Velles are not from Mariner 9. They are MOC images from the Mars Global Surveyor. This needs to be corrected. Schaffman (talk) 22:13, 27 November 2010 (UTC)

Done, but you are welcome to be bold to correct obvious mistakes. ChiZeroOne (talk) 22:48, 27 November 2010 (UTC)

External links modified

Hello fellow Wikipedians,

I have just added archive links to one external link on Mariner 9. Please take a moment to review my edit. If necessary, add {{cbignore}} after the link to keep me from modifying it. Alternatively, you can add {{nobots|deny=InternetArchiveBot}} to keep me off the page altogether. I made the following changes:

• Added archive https://web.archive.org/20130514043808/http://www.nasa.gov/offices/oce/appel/ask-academy/issues/volume4/ata_4-9_mariner_9_prt.htm to http://www.nasa.gov/offices/oce/appel/ask-academy/issues/volume4/ata_4-9_mariner_9_prt.htm

When you have finished reviewing my changes, please set the checked parameter below to true to let others know.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

• If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
• If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers. —^{cyberbot II}_{Talk to my owner:Online} 03:43, 4 September 2015 (UTC)

Data transmission Error correction clarification

"The data words used during this mission were 6 bits long, which represented 64 grayscale values. Because of limitations of the transmitter, the maximum useful data length was about 30 bits. Instead of using a repetition code, a [32, 6, 16] Hadamard code was used, which is also a 1st-order Reed-Muller code. Errors of up to 7 bits per word could be corrected using this scheme."

Am I reading this wrong? The word length was 6 bits, the ECC could correct up to 7 bits per word. ? Confused.

92.20.159.10 (talk) 18:59, 14 March 2016 (UTC)Sam, UK

Out of 32 bits in the word 7 bits could be wrong. The article was correct but poorly worded. I corrected it. Ruslik_Zero 19:26, 14 March 2016 (UTC)

External links modified

Hello fellow Wikipedians,

I have just modified 2 external links on Mariner 9. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

• Added archive https://web.archive.org/web/20120731101459/http://solarsystem.nasa.gov/missions/profile.cfm?MCode=Mariner_09 to http://solarsystem.nasa.gov/missions/profile.cfm?MCode=Mariner_09
• Added archive https://web.archive.org/web/20120211142601/http://sse.jpl.nasa.gov/missions/profile.cfm?Sort=Target&Target=Mars&MCode=Mariner_09 to http://sse.jpl.nasa.gov/missions/profile.cfm?Sort=Target&Target=Mars&MCode=Mariner_09

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

• If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
• If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 21:53, 2 June 2017 (UTC)

Talk in article and issue with "Error-Correction Code"

Found these lines (under "Error-Correction Codes achievements"), while reading the main article, I am pretty sure shouldn't be there:

This paragraph needs revision, I have found. Anyway it deserves ongoing investigation (alternatively it may be possible that the Hadamard (32,6,16) method just sequentially processed incoming 6 bits without reference to data type, it would nice for clarity to tidy this issue. The coded data was only used on the science data, coding was one factor that allowed higher data rates (up to 16.2kbit/s) for which the interleaved frame format is described elsewhere within NASA's various reports.

Written there in 'Revision as of 12:40, 30 November 2017' by RaymondTHill

I decided to deleted it from the main article (and put it out here). Please correct it in case I am wrong and help to resolve or declare this technical issue as template! I am not familiar with (issue and templates)...

--David Schopenhauer (talk) 21:21, 5 April 2018 (UTC)

References

Mariner observations of Phobos & Deimos

Obviously I have no references for this, but ...

I sat enthralled at the Summer Science School at Sydney Uni in 1973 or 74 whilst Frank Drake and Carl Sagan presented the images and data from this spacecraft. Sagan told an amusing story. He had wanted the spacecraft to do observations of Phobos & Deimons, but had been overruled. But, as described here, when the spacecraft arrived, there was a huge dust storm raging on the planet, and the mission effectively had "nothing to do". Therefore, Sagan's proposal for observing the Moons was hurriedly resurrected and the Moons were indeed imaged.