Date   

Re: Flight recap from Project: Traveler/NSTAR

Zack Clobes W0ZC
 

Yeah, I was just doing some more digging. The Ras Pi forums are referring to it as a "lens correction" issue. Looks like it's a defined problem, although the solution may involve some hand-tuning.


Zack 


On Sun, Jul 12, 2020 at 3:39 PM Hank Riley via groups.io <n1ltv=yahoo.com@groups.io> wrote:
Zack,

It's certainly apparent what you're talking about and it would be disappointing to anyone.

Using the commonplace meaning of chromatic aberration (of two distinct types), what you have is not chromatic aberration.  I'll get a better look tonight but some of the images look as if they're suffering from big differences in brightness, the effect of which is similar superficially to "lens flare" but not the same.

Regarding "lens distortions," this phrase is usually used to refer only to departures from rectilinearity, so it's a geometric or topological deficiency.



On Sunday, July 12, 2020, Zack wrote:

I uploaded a few photos from yesterday's flight.


As I dug into the photos from that RasPi  camera, I'm seeing a lot of lens distortion (chromatic aberrations) which is quite disappointing. 


Re: Flight recap from Project: Traveler/NSTAR

Steve G8KHW / AJ4XE
 

Hi Zack - Ive not tried (or even seen) that particular pi camera before but I see its based on the 5Mp OmniVision OV5647 sensor - that was the sensor used by the original pi v1 camera.  Raspberry pi replaced the v1 camera with the 8Mp v2 around 2016 because OmniVision had stopped production of the OV5647 in 2014.

Yet since that time there are many camera boards based on that sensor - some as cheap as $4.   I suspect that the OV5647 is now being pirated.  Cameras based on that sensor seem to perform adiquatly on the ground - but when you get them airborne and bright light they suffer with what I call purple haze (very jimi hendrix).  I think your pictures are suffering form a variant of that rather than chromatic aberration.    Maybe something can be done with filtering or different configuration - but I have yet to find it.

The original genuine V1.3 or V2 camera (based on a Sony Sensor) seem best for HAB - although the V2 does need some re-focusing (its set focus is about 2m).  There is also a 12MP v3 camera out - but I haven't tried it yet.

    Steve


On 12/07/2020 20:30, Zack Clobes W0ZC wrote:
I uploaded a few photos from yesterday's flight.



As I dug into the photos from that RasPi  camera, I'm seeing a lot of lens distortion (chromatic aberrations) which is quite disappointing. The aerial photos that I uploaded are un-edited and you can see hints of it if you look at the saturations levels in the middle of the photo vs. the outer edges.

This is the camera sensor/lens that I was using:
 


Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.

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Re: Flight recap from Project: Traveler/NSTAR

Hank Riley
 

Zack,

It's certainly apparent what you're talking about and it would be disappointing to anyone.

Using the commonplace meaning of chromatic aberration (of two distinct types), what you have is not chromatic aberration.  I'll get a better look tonight but some of the images look as if they're suffering from big differences in brightness, the effect of which is similar superficially to "lens flare" but not the same.

Regarding "lens distortions," this phrase is usually used to refer only to departures from rectilinearity, so it's a geometric or topological deficiency.



On Sunday, July 12, 2020, Zack wrote:

I uploaded a few photos from yesterday's flight.


As I dug into the photos from that RasPi  camera, I'm seeing a lot of lens distortion (chromatic aberrations) which is quite disappointing. 


GPSL 2020

Harry M
 

Thanks to all for a great GPSL 2020!

I woke up this morning with this weird feeling that I was in a motel room and I had to drive home. ;)


Flight recap from Project: Traveler/NSTAR

Zack Clobes W0ZC
 

I uploaded a few photos from yesterday's flight.



As I dug into the photos from that RasPi  camera, I'm seeing a lot of lens distortion (chromatic aberrations) which is quite disappointing. The aerial photos that I uploaded are un-edited and you can see hints of it if you look at the saturations levels in the middle of the photo vs. the outer edges.

This is the camera sensor/lens that I was using:
 


Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.


Re: K7HAK & KC7VQR launch photos

Bruce Coates
 

I totally understand.  ;-)


-------- Original message --------
From: steve potter <spotterotter@...>
Date: 7/12/20 7:27 AM (GMT-06:00)
To: GPSL@groups.io
Subject: Re: [GPSL] K7HAK & KC7VQR launch photos

That was the dual 36 inch Mylar balloon with the skytracker. I'm glad to see that it made it thru the night, first night is the most stressful for me.


Re: K7HAK & KC7VQR launch photos

steve potter
 

That was the dual 36 inch Mylar balloon with the skytracker. I'm glad to see that it made it thru the night, first night is the most stressful for me.


K7HAK & KC7VQR launch photos

steve potter
 

Wish I had some video from our launch for you guys but here is a couple of photos, just grabbed a couple from Neowise this morning, so awesome! Thanks again for the opportunity to join in on this event! -K7HAK


Re: GPSL 2020 - it's today!

x-f@...
 

Hey, guys!
Thanks for organising the Great Planet Super Launch 2020! :) Wonderful job! 
Never thought I would participate in GPSL, since it is taking place sooo far away, but this year’s online symposium made it possible and it was great. “Modern problems require modern solutions”, you know.
 
Thanks to all the presenters for interesting topics, lots of great ideas! I’ve been pondering about reaction wheels for a while now, but never thought about using a rudder for pointing, and I want to build that simple particle detector now, I didn’t know about TTN, and “oh, wow!” that livestreamed balloon burst. Thanks to the audience for the follow-up discussions as well, enjoyed the talks!
I missed the start of Jayant’s presentation, so will eagerly wait for the recordings to be published later.
 
Thank you all and stay safe!
 
Regards,
Kristaps YL3AJN / x-f
 


Re: Joanne's email anyone? Friday latex balloon recovery map

Hank Riley
 

No, not enough time today for that.   The map produced was a high quality USGS topo map since this was hilly terrain and did get into backcountry land if the payload landed some distance from the last available APRS position. 

Will do it later tonight or tomorrow just for fun.  Don't tell me.  :)


On Saturday, July 11, 2020, 06:20:15 PM EDT, Tim wrote:

DId you come up with a projected landing site?   since we know where that actually was at today...   let's see how close you were. 


Re: Joanne's email anyone? Friday latex balloon recovery map

Hank Riley
 

Thanks, Tim.  From recent experience with John's nice SLR developing legs and walking away from the landing site (also in CA), it seems prudent to try to get to these landing sites as soon as possible.

This one was much closer by to a real neighborhood than I would have dreamed when I heard earlier today that it was "on a mountain."


On Saturday, July 11, 2020, 06:18:53 PM EDT, Tim wrote:

Joanne should have already made the pick up on this.... The local Fire Dept was contacted that they used it as a mock training  SAR type of activity....  


VA5BNC-15 Launch

Bruce Coates
 

Hi

The video is just being uploaded to YouTube and will available in about at https://youtu.be/NFVozF8n4XA .

For now, here's a still frame from the "point of no return" from the launch as the payload is about a foot away from my hand.

73, Bruce - VE5BNC


Re: Joanne's email anyone? Friday latex balloon recovery map

Tim C KC8ZNJ
 

DId you come up with a projected landing site?   since we know where that actually was at today...   let's see how close you were. 


On Sat, Jul 11, 2020 at 3:18 PM Timothy Cathcart <tim.cathcart@...> wrote:
Joanne should have already made the pick up on this.... The local Fire Dept was contacted that they used it as a mock training  SAR type of activity....  

I spoke to her about an hour ago and was at the local BBQ place picking up lunch for those folks and was heading to pick up the payload. 

She did mention the FD folks said they found it about 25 FT up in a pine tree....

Awesome recovery.    

cheers! 


On Sat, Jul 11, 2020 at 2:26 PM Hank Riley via groups.io <n1ltv=yahoo.com@groups.io> wrote:
I have done a custom map to help make the recovery of the KM6BWB Friday latex balloon go quickly and easily.  Last APRS was south of Bakersfield, CA.

Sent a couple of emails containing the mapping to the best email I could find fairly quickly; it was from a teacher and/or ARISS webpage.

If anyone has a direct email address for her, please email me.  It would be nice if she gets this map today or tomorrow.  Maybe she herself will see this request.

Hank


Re: Joanne's email anyone? Friday latex balloon recovery map

Tim C KC8ZNJ
 

Joanne should have already made the pick up on this.... The local Fire Dept was contacted that they used it as a mock training  SAR type of activity....  

I spoke to her about an hour ago and was at the local BBQ place picking up lunch for those folks and was heading to pick up the payload. 

She did mention the FD folks said they found it about 25 FT up in a pine tree....

Awesome recovery.    

cheers! 


On Sat, Jul 11, 2020 at 2:26 PM Hank Riley via groups.io <n1ltv=yahoo.com@groups.io> wrote:
I have done a custom map to help make the recovery of the KM6BWB Friday latex balloon go quickly and easily.  Last APRS was south of Bakersfield, CA.

Sent a couple of emails containing the mapping to the best email I could find fairly quickly; it was from a teacher and/or ARISS webpage.

If anyone has a direct email address for her, please email me.  It would be nice if she gets this map today or tomorrow.  Maybe she herself will see this request.

Hank


Re: Joanne's email anyone? Friday latex balloon recovery map

Hank Riley
 

....  the best email I could find fairly quickly [but not hers].


On Saturday, July 11, 2020, 05:26:19 PM EDT, Hank wrote:

Sent a couple of emails containing the mapping to the best email I could find fairly quickly; it was from a teacher and/or ARISS webpage.


Joanne's email anyone? Friday latex balloon recovery map

Hank Riley
 

I have done a custom map to help make the recovery of the KM6BWB Friday latex balloon go quickly and easily.  Last APRS was south of Bakersfield, CA.

Sent a couple of emails containing the mapping to the best email I could find fairly quickly; it was from a teacher and/or ARISS webpage.

If anyone has a direct email address for her, please email me.  It would be nice if she gets this map today or tomorrow.  Maybe she herself will see this request.

Hank


Re: Recovery

Michael
 

Louise and I launched a SkyTracker and SBS-13 to get a circumnavigation on the books. Unfortunately the sealer recommended is not available and I used what I thought was an equivalent (same specs). It was not equivalent though, and burned a small line in the balloon rather than the wide seal that should have resulted. So SkyTracker and SBS-13 are headed back down already.

Space is hard. :)

-- Michael K5NOT
Michael Willett
Mobile: 214-578-2400
mw@advancedsourcinginc.com
www.advancedsourcinginc.com


Re: GPS Recap gathering on Zoom - 7pm Central

L. Paul Verhage KD4STH
 

My cell phone won't let me log in to zoom. Is there a call in phone number?


On Sat, Jul 11, 2020, 12:21 PM Michael Hojnowski <kd2eat@...> wrote:
Gang,

I am leaving the zoom session up for the remainder of the day. There are
still 25+ people hanging out.  Feel free to join and and chat. We will
formally gather again at 7pm CDT, for those available, to get a brief
recap from all of our launchers today.

https://cornell.zoom.us/j/91714068792?pwd=d3RleVlEK3RSSWNLbkozcG91RzRldz09

Hope to see you then, and thanks for a great Superlaunch!

Mike & Mark
KD2EAT & N9XTN




GPS Recap gathering on Zoom - 7pm Central

Michael Hojnowski
 

Gang,

I am leaving the zoom session up for the remainder of the day. There are still 25+ people hanging out.  Feel free to join and and chat. We will formally gather again at 7pm CDT, for those available, to get a brief recap from all of our launchers today.

https://cornell.zoom.us/j/91714068792?pwd=d3RleVlEK3RSSWNLbkozcG91RzRldz09

Hope to see you then, and thanks for a great Superlaunch!

Mike & Mark
KD2EAT & N9XTN


NSTAR/Project:Traveler recovered

Mark Conner N9XTN
 

We had a hike through corn and some issue finding it, but eventually we located it in 8-ft corn.  On the way back to Omaha.



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