1. GPSL@groups.io
  2. Messages
   Date   
Re: Joanne KM6BWB

Bruce Coates
 

Ya, the drive back from my flight was nearly 90 seconds.  It would have been shorter but there was a yield sign on the way.  ;-)




-------- Original message --------
From: Harry M <hhm_74115@...>
Date: 7/12/20 3:10 PM (GMT-06:00)
To: GPSL@groups.io
Subject: [GPSL] Joanne KM6BWB

Hey Joanne in your Instagram reply you said that your pico also transmit on 144.394. Is that correct?
Looks like we have a race on our hands.

Bruce Coates
 

By the looks of it, Steve's floaer, K7HAK-11, will likely overtake min,  VA5BNC-15, some tmie over night.  His is flying 2500 metres higher and the wind is about 30 km/h faster up there.  Pretty amazing considering they were launched nearly 1500 km apart.


KK6UUQ7 in range of Denver area now

Bill Brown
 

For those of you in EOSS territory, KK6UUQ-7 is in RF range of Denver.  It transmits on 144.390 MHz APRS every 2 minutes and then 10 seconds later on a clear channel of 144.340 MHz.

-Bill WB8ELK
Re: Joanne KM6BWB

Bill Brown
 

Harry,

  Joanne's Pico is one of my APRS Skytrackers. It transmits on 144.390 every 2 minutes and 10 seconds later it transmits on 144.340 MHz.

- Bill WB8ELK


-----Original Message-----
From: Harry M <hhm_74115@...>
To: GPSL@groups.io
Sent: Sun, Jul 12, 2020 4:10 pm
Subject: [GPSL] Joanne KM6BWB

Hey Joanne in your Instagram reply you said that your pico also transmit on 144.394. Is that correct?
Re: Flight recap from Project: Traveler/NSTAR

James Hannon
 

I have heard that cameras lacking an IR blocking filter will have a pink cast.

Jim Hannon

On 7/12/2020 4:10 PM, Hank Riley via groups.io wrote:
Often making the image better looking makes the lens/sensor defects more tolerable.
Nothing fancy in the way of image software was employed here.  Freeware from something like 14 years ago.  Global brightness, contrast, saturation, and sharpness were adjusted.
Probably overdid the darkening, but it demonstrates what can be done. With something fancy like Photoshop or equivalent, the pink problem could be selectively worked upon.
I think the RPi lens/image sensor system looks really awful, at least the one you got, since this pink haze is happening barely after leaving the ground.  Looks like it's maybe all due to the sensor, not the lens. Shouldn't have to rework this kind of simple picture; the same thing could happen on the ground at the beach.
Inline image
--
WB0TXL
WEB Page http://www.ocrslc.net/
Blog http://jimhannon.wordpress.com
CoCoRaHS station IA-LN-7
42,11.90N,91,39.26W
Re: Flight recap from Project: Traveler/NSTAR

Zack Clobes W0ZC
 

Yeah, and i intentionally didn't do any post-editing on these photos so as to not mask the problem, etc. Normally I would touch them up a bit before posting.

I'm torn, as I think the optics are decent on this camera and (with processing) would be better than the old Canon that I have CHDK running on. Having the Pi really opens up a whole new world when I'm working with a school to let the kids do some programming on it. But if I can't get a steady supply of these things then I don't know if it's worth pursuing this option. It was nice because I had maybe $80 is the whole solution and could easily reduce that by going with the Pi Zero for instance.


Zack



On Sun, Jul 12, 2020 at 4:11 PM Hank Riley via groups.io <n1ltv=yahoo.com@groups.io> wrote:
Often making the image better looking makes the lens/sensor defects more tolerable.

Nothing fancy in the way of image software was employed here.  Freeware from something like 14 years ago.  Global brightness, contrast, saturation, and sharpness were adjusted.

Probably overdid the darkening, but it demonstrates what can be done.  With something fancy like Photoshop or equivalent, the pink problem could be selectively worked upon.

I think the RPi lens/image sensor system looks really awful, at least the one you got, since this pink haze is happening barely after leaving the ground.  Looks like it's maybe all due to the sensor, not the lens.  Shouldn't have to rework this kind of simple picture; the same thing could happen on the ground at the beach.

Inline image
Re: Flight recap from Project: Traveler/NSTAR

Hank Riley
 

Often making the image better looking makes the lens/sensor defects more tolerable.

Nothing fancy in the way of image software was employed here.  Freeware from something like 14 years ago.  Global brightness, contrast, saturation, and sharpness were adjusted.

Probably overdid the darkening, but it demonstrates what can be done.  With something fancy like Photoshop or equivalent, the pink problem could be selectively worked upon.

I think the RPi lens/image sensor system looks really awful, at least the one you got, since this pink haze is happening barely after leaving the ground.  Looks like it's maybe all due to the sensor, not the lens.  Shouldn't have to rework this kind of simple picture; the same thing could happen on the ground at the beach.

Inline image
Joanne KM6BWB

Harry M
 

Hey Joanne in your Instagram reply you said that your pico also transmit on 144.394. Is that correct?
Re: Flight recap from Project: Traveler/NSTAR

Steve G8KHW / AJ4XE
 

Actually that does look more like the problem.

    Steve


On 12/07/2020 21:43, Zack Clobes W0ZC wrote:
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.


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



Hank
___________________________________________________________


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. 

Virus-free. www.avg.com

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.

Virus-free. www.avg.com

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....  
561 - 580 of 18057