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31 Jul 2021, 14:44 [ UTC - 5; DST ]


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 20 Apr 2021, 10:00 
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Video of first flight here.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 20 Apr 2021, 22:36 
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That’s really cool. Thanks for sharing.


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 21 Apr 2021, 17:46 
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It lands with authority :D


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 21 Apr 2021, 17:49 
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Amazing!!
:clap: :bow: :thumbup:

Leldon


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 21 Apr 2021, 19:47 
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Second flight scheduled for 22 April. Details here.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 21 Apr 2021, 22:38 
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Username Protected wrote:
Second flight scheduled for 22 April. Details here.

I wonder what date that translates to in the Martian calendar.
:D

The NASA article in your link does say something about "18th of the 30 sols (Martian days) of our flight test window," so I guess they're thinking in both local time and... local time.


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 22 Apr 2021, 12:02 
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Username Protected wrote:
The NASA article in your link does say something about "18th of the 30 sols (Martian days) of our flight test window," so I guess they're thinking in both local time and... local time.

Both teams (rover and helicopter) are working on Martian time and have been since landing. A Martian solar day (Sol) is about 2.7% longer than a Terran Sol. By using Martian time, the teams know that their operations will always be at the appropriate time of day (not night because our clocks drifted apart).

This results in not only a "time zone" difference, but also a sort of rotating work schedule, which over years can become pretty far off from local time. For example, right now the Curiosity rover is on Sol 3096, so the team's "clock" is about 142 days off from our calendar.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 22 Apr 2021, 13:53 
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Details about and video from second flight here.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 22 Apr 2021, 15:55 
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I'm still looking forward to the pix from the 13 MP color horizon-facing camera on Ingenuity. Haven't seen any from flight 1. Perhaps they haven't yet been downlinked (certainly true for today's flight); I'm a bit surprised that none of the press releases or tweets have discussed that aspect. The press kit for the helo says "The images taken during the flight (up to four black-and-white navigation and three color) will be received on Day 3" (the flight tests are on a 3-day rotation).
Jay

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 24 Apr 2021, 14:52 
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Third flight set for Sunday morning.

This blog post notes that the team pilot is logging each flight; I think these qualify as cross-country legs:

Quote:
Even though we are conducting our flight tests in a tenuous atmosphere over 180 million miles (290 million kilometers) from Earth...

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 24 Apr 2021, 15:27 
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Username Protected wrote:
I think these qualify as cross-country legs:

That only depends on the airport of departure versus landing, so no, these aren't cross country.

They are, however, beyond visual line of sight. A waiver for BVLOS is only required for operation "in the United States" per 14 CFR 107, so they are okay as long as there is no Mars civil aviation authority with jurisdiction.

The USA is the only country to have successfully landed operational craft on Mars or deployed Mars rovers that worked. This includes 5 landers and 5 rovers. The only Mars lander from USA that failed was Mars Polar Lander which famously failed due to a units conversion problem in 1999. Russia has tried 9 times to send landers, all failed.

The closest any other country has come is Russia in 1971 with "Mars 3" lander. It landed and survived only 110 seconds before all contact was lost.

The Chinese have a lander in orbit, they plan to try landing it next month. It has a rover, about the scale of Sojourner, the first USA rover from 1997. If they are successful, it will be the first Mars lander and rover not from the USA.

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 24 Apr 2021, 17:19 
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First airborne image was released and is up here: https://mars.nasa.gov/resources/25846/f ... e-of-mars/
Jay

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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 25 Apr 2021, 16:14 
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Username Protected wrote: "Today, we want to make the invisible visible. So, we have worked with JPL to place a new Mars 2020 Helicopter Mission badge on the GitHub profile of every developer who contributed to the specific versions of any open-source projects and libraries used by Ingenuity." The developer list was created by JPL providing GitHub with a comprehensive list of every version of every open source project used by Ingenuity. GitHub could then identify all the contributors who made these projects and their dependencies. Some of those honored, such as Linux's creator Linus Torvalds, are famous developers. Many others labor in obscurity -- but now their work is being recognized.
Timothy Canham, a JPL embedded flight software engineer, notes Ingenuity's program is powered by a Qualcomm Snapdragon 801 running at 2.2GHz, which is "far faster than the Mars Perseverance's rover processors," according to ZDNet. The reason this older chip was used is because it meets NASA's High-Performance Spaceflight Computing (HPSC) radiation standards.

Canham also says the flight control software on Ingenuity runs at 500Hz. The flight software "is used to control the flight hardware and read sensors 500 times per second in order to keep the helicopter stable." Canham added: "We literally ordered parts from SparkFun [Electronics]. This is commercial hardware, but we'll test it, and if it works well, we'll use it."


A very, very cool move.


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 25 Apr 2021, 16:33 
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Username Protected wrote:
Look what Orville and Wilbur started....

Hi Matt,
I might take a small exception to that analogy.

IMO the wright brothers and charlie taylor (it was a team of 3 not of 2) are today epitomized by space-x, blue origin, etc.

Nasa today is more the equivalent of samuel langley circa 1900. Government-funded, committed in principle to advancing science, but too mired in bureaucracy and confined thinking to create a step change in technical capability.


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 Post subject: Re: Wright Flyer & (Mars) Ingenuity Helo ...
PostPosted: 25 Apr 2021, 16:53 
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Username Protected wrote:
Canham also says the flight control software on Ingenuity runs at 500Hz. The flight software "is used to control the flight hardware and read sensors 500 times per second in order to keep the helicopter stable."

In the early 1980’s I worked on real time software (robotics) for IBM. Our control software ran at 50Hz on a Series/1. At full capacity (joint and sensor management) that left only 25% of the system for the user’s application. And the Series/1 key limitation was an addressable memory of 64K.

Yes, I feel old... and impressed with today’s accomplishments.


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