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Tianwen-1 attitude in Mars orbit

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Re: Tianwen-1 attitude in Mars orbit

#11

Post by GravitasFailure »

tastyfreeze wrote: post #10
GravitasFailure wrote: post #9

Earlier quoted context omitted.

Apparently the encryption has to do with needing to have a license from NOAA in order to broadcast images of Earth. https://www.theverge.com/2018/4/5/17197742/spacex-falcon-9-r...

Thank you for sharing. NOAA requiring a license for images of Earth is infuriating. Do they require other countries to get a license as well?

My understanding is it's intertwined with national security issues. NOAA doesn't have the ability to demand a license from other nations, though there may be some treaty obligations they adhere to.

Re: Tianwen-1 attitude in Mars orbit

#12

Post by GekkePrutser »

GravitasFailure wrote: post #9
GekkePrutser wrote: post #6

Earlier quoted context omitted.

I don't think the backyard idiot would have this in their backyard: https://amsat-dl.org/en/20-meter-antenna/ which is what they used to receive this. Sending control commands would be even harder. Mars is far. But for earth orbiting says this is more of a risk indeed. The uplink (control commands)would be encrypted for sure but the downlink (telemetry) is often not for scientific missions. For military or commercial…

Apparently the encryption has to do with needing to have a license from NOAA in order to broadcast images of Earth. https://www.theverge.com/2018/4/5/17197742/spacex-falcon-9-r...

Interesting. It makes no sense at all in this case because the stated reason for the law (capturing troop movements) is impossible here. The resolution and focal length is way too low to see anything smaller than a few miles in diameter :)

But it is a law... It should be repealed or specified in more detail IMO (e.g. only applying to really high detail levels). But I can imagine the US Govt has bigger fish to fry right now with a raging pandemic.

Re: Tianwen-1 attitude in Mars orbit

#14

Post by danielbarla »

Out_of_Characte wrote: post #13

Its supposed to me altitude right? not attitude which is a (emotional) disposition towards something. a google search reveils no alternative meaning yet its written wrong 17 times.

From [1] attitude, in the context of spacecraft, means:

> Attitude is part of the description of how an object is placed in the space it occupies. Attitude and position fully describe how an object is placed in space.

So, basically, its relative orientation and rotation.

[1] https://en.wikipedia.org/wiki/Attitude_control

Re: Tianwen-1 attitude in Mars orbit

#15

Post by icebadger »

Out_of_Characte wrote: post #13

Its supposed to me altitude right? not attitude which is a (emotional) disposition towards something. a google search reveils no alternative meaning yet its written wrong 17 times.

From Merriam-Webster Dictionary [0]:

>5 : the position of a craft (such as an aircraft or spacecraft) determined by the relationship between its axes and a reference datum (such as the horizon or a particular star)

[0] https://www.merriam-webster.com/dictionary/attitude

Re: Tianwen-1 attitude in Mars orbit

#16

Post by Spare_account »

Out_of_Characte wrote: post #13

Its supposed to me altitude right? not attitude which is a (emotional) disposition towards something. a google search reveils no alternative meaning yet its written wrong 17 times.

I see you've had some other answers about the meaning of 'attitude' in this context, so I thought I would address the other part of your comment:

>a google search reveils no alternative meaning

A Google query that worked well for me to learn more about this was 'attitude orbit'. Including another word from the knowledge area (borrowed from the article title) helped Google understand the context I was searching within:

https://www.google.com/search?q=attitude+orbit

Re: Tianwen-1 attitude in Mars orbit

#17

Post by [deleted] »

kerng wrote: post #2

Always interesting when something is on front page, but doesn't have a single comment. Anyone one know why that can happen? Is it that a title sounds interesting, so people upvote (this one had 86 votes) but noone actually reads or finds anything of interest in the article to discuss? Just curious. I, for one, find it interesting that anyone with the necessary equipment can observe spaceships and satellites, etc and…

[deleted]

Re: Tianwen-1 attitude in Mars orbit

#18

Post by pjc50 »

Out_of_Characte wrote: post #13

Its supposed to me altitude right? not attitude which is a (emotional) disposition towards something. a google search reveils no alternative meaning yet its written wrong 17 times.

https://en.wikipedia.org/wiki/Attitude_control

> a google search reveils no alternative meaning

You could file this under "yet another deterioration of google effectiveness by personalisation of search results", except it's not even true? I put "attitude" in and it gave me a dictionary expand-o-box with "3. the orientation of an aircraft or spacecraft, relative to the direction of travel."

Re: Tianwen-1 attitude in Mars orbit

#19

Post by pjc50 »

kerng wrote: post #2

Always interesting when something is on front page, but doesn't have a single comment. Anyone one know why that can happen? Is it that a title sounds interesting, so people upvote (this one had 86 votes) but noone actually reads or finds anything of interest in the article to discuss? Just curious. I, for one, find it interesting that anyone with the necessary equipment can observe spaceships and satellites, etc and…

> Always interesting when something is on front page, but doesn't have a single comment.

Comments are for bickering. Not having comments but being on the front page is a sign of good, wholesome, undisputed content.

Re: Tianwen-1 attitude in Mars orbit

#20

Post by simsla »

pjc50 wrote: post #18
Out_of_Characte wrote: post #13

Its supposed to me altitude right? not attitude which is a (emotional) disposition towards something. a google search reveils no alternative meaning yet its written wrong 17 times.

https://en.wikipedia.org/wiki/Attitude_control > a google search reveils no alternative meaning You could file this under "yet another deterioration of google effectiveness by personalisation of search results", except it's not even true? I put "attitude" in and it gave me a dictionary expand-o-box with "3. the orientation of an aircraft or spacecraft, relative to the direction of travel."

Could still be due to search personalisation.

I get programming results even for non programming terms. I am pretty confident that's not the case for my mom.

It stands to reason that people's search results could be wholly uninformative if Google thinks the subject matter is unlike what you usually read.

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