Looks good. We'll get it built Tuesday.
-n
On Fri, Apr 12, 2013 at 6:35 PM, Andrew Greenberg wrote:
> Hi Nathan,
>
> If you manage to find any time in your PSAS networking in Phoenix, I've
> just pushed all of the stuff necessary to do the "v2" rocketnet
> connector board. It's all in:
>
> av
Here are some notes from Tuesdays meeting about the design of the
flight computer framework.
Also a more fleshed out diagram of the rocket state.
http://psas.pdx.edu/news/2013-05-21_-_FCF_Design_for_Summer_2013_Launch/
The difference between safe and recovery is in recovery mode the ATV
power a
I can be there as well, not that I'm much help usually :)
Yes, it's Lab 84, because the room number is 84. Very creative.
Is there any chance we can write a quick and dirty simulator module
(for the ADIS) to run data through the roll control and out to the
logger without having to be attached to
The good news on Tuesday is that we ran the FCF on the actual flight
computer, and even recorded a log file!
I finally got to sit down today and try and read the data back out and
found this:
I didn't see any packet headers (only message headers), but that's
fine, I don't know where those get add
Hey,
Theo and I were working on the FCF this afternoon, and I'm trying to
get up to speed fast. I'm hacking away at it like wild, but don't be
scared we can rollback my dumb code, that's what git is for. ;)
Anyway I suddenly remembered that psas has an IRC server. I set up a
screen session wit
Work continued today at PSU on the Flight Computer Framework (FCF).
Theo, Ian, and myself worked on it all afternoon. Ian got a lot of the
old GPS reader code ported and Theo did a large re-factoring and
constancy-ing of the names in the framework.
Theo had to run and catch a train, but I just go
Hey,
We ended up making the ground systems SSID the same as the
air-to-ground. This seems bad, they are two different systems.
Because the rocket is already set up and working with the trackmaster,
lets change the ground to 'psas-ground'. I think we only have to
change the wlan0 line in /etc/netw
Well, this sucks.
On Tuesday with Kenny's help we dd'd the entire CF card from the
flight computer onto my laptop and mounted a copy so we could pull the
complete logs from the FCF.
The raw logs are all here:
https://github.com/psas/flight_data-launch10/tree/master/fc/fc
I finished writing a
Anecdotally, nearly everything I do is ~2.7. The python community as
a whole seems deathly allergic to upgrading to 3. /shrug
Mostly I don't worry about it. You can set the python you want in a
virtual env with the -p flag so that it's different for different
projects, for instance:
$ mkvirt
I came across these two things while reading about CubeSat and
small-sat mission design:
'NORM' NACK-Oriented Reliable Multicast
http://cs.itd.nrl.navy.mil/work/norm/
Which looks like a communication standard built around a similar sort
of UDP scheme we came up with for the flight computer.
I was pointed to this project the other day by Alexandru Csete, a somewhat
well known HAM radio person in Denmark.
https://github.com/csete/stlm
He's been working with Copenhagen Suborbitals for a while (of course) and
he published their radio telemetry work. For once, it's an open source
aerosp
Hi!
I'm a week or two late, but us software types are going to start our
first top-down, full-stack review tonight. Please come if you can
make it! At the beginning will be a fair amount of diagrams and
painting with broad strokes, so it's a good way to get familiar with
the system even if you'r
Just for the umbilical, because we can't get a connector with very
many pins in the right size (i.e., the size of the hole that's already
in the airframe). One solution is to use PoE from the launch tower to
the umbilical so we can get away with a ~5 pin connector.
-n
On Thu, Mar 27, 2014 at 11:4
Cool!
Yeah, I talked to Arfon about us a while ago. I'm surprised he
remembered though!
-Nathan
On Wed, May 14, 2014 at 11:43 AM, Jenner Hanni wrote:
> Hey, so Github has a post out this morning about some recent work
> improving Github for science and research. PSAS got a mention in the
> fir
d RPLoS, among others
> that I haven't heard of but which look awesome. There are two
> astronomy-related ones, emcee and astropy.
>
> https://github.com/showcases/science
>
> On Wed, May 14, 2014 at 1:03 PM, Nathan Bergey
> wrote:
>> Cool!
>>
>> Yeah
He said (on IRC this afternoon) he'd be in the rocket room tonight
around 5:30 hammering on it.
-n
On Mon, Jun 2, 2014 at 2:28 PM, Rob Gaskell wrote:
> Theo,
>
> Any luck on the driver? Can I bribe you with anything to make this happen?
>
> Rob
> Rob
>
> _
I just quietly released a PSAS blog. We could add a 'GPS' category and
put minutes there. By far the most useful thing would be links to
resources looked at during the lesson. Besides that it could just be a
couple of sentences, e.g., "Tonight we talked about Costas loops, look
at this paper [link]
Found this video today about how "IQ" signaling and constellation
diagrams work. With working examples! Nice to know and relevant for
GPS -- BPSK was one of the first ones covered. It's about 20 minutes
long.
https://www.youtube.com/watch?v=h_7d-m1ehoY
-Nathan
__
I have a list of feature requests. Mostly to take the current box and
bring it up to more 'modern' PSAS standards.
None of this is to say that the LTC that people have been working on
over the last few years is bad! In fact it worked near perfect during
the last launch. But there are always improv
I think nearly everyone is out of town.
We'll meet up again next week at 6:00!
Regular meeting is at 7:00 of course.
-Nathan
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We even have a real rocket room now! We can break off and work there.
Or possibly the 84 conference room.
-n
On Sat, Nov 8, 2014 at 3:37 PM, Paul Mullen wrote:
> On Sat, Nov 08, 2014 at 03:02:46PM -0800, Aaron Baker wrote:
>> Or. Actually, I'm okay to stay a couple hours extra Tuesday night,
>>
Copenhagen Suborbitals is having trouble with their Piksi, but they
also got a sponsorship for an unlocked GPS (NovAtel OEM615)! Jerks :)
http://copsub.com/news-from-the-gps-front/
-Nathan
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> There's a small X200-ish ThinkPad in one of the LTC equipment bins.
> Does anyone know what's on that laptop?
It just has the telemetry server on it. In fact it doesn't even have X
installed.
Theo and I have the the LTC comm software installed on our laptops. It
lives here with install instruct
I think, personally, that last weeks GPS class went very well.
Instead of lecture we tried to all work on our own implementations in
a language of choice. Being able to work on it in class as opposed to
as homework made it so we could get instant feedback on burning
questions about sample-rate and
I just came across this on github:
https://github.com/akunze3/pytrajectory
I haven't actually gotten past the first page of the docs, but it look
interesting.
-Nathan
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Can we do a design review on Tuesday?
-Nathan
PSAS
On Wed, Mar 25, 2015 at 1:42 AM, Andrew Greenberg wrote:
> Hey! The v3 GPS board is done. Please pull and give me feedback as soon
> as you can, I'd love to ship this out ASAP.
>
> https://github.com/psas/gps-rf-board
>
> Things to think about:
Speaking of Doppler shifts, back when we were doing the GPS class we
were catching satellites at >10kHz Doppler using the recorded data we
found, and that really shouldn't be possible for a receiver at rest
(relative to the Earth surface).
I never looked into it further but i am suspicious of the
I decided I had to look this up because what numbers we coming up with
didn't jive with my memory. I almost made an iPython notebook, but
this particular reference laid it out better than I could anyway!
https://books.google.com/books?id=HQCGPr7pGV8C&lpg=PA37&ots=kxVHED5Z-B&dq=calculate%20gps%20do
Hi GPS nerds,
I found this today via a GPS mailing list:
https://github.com/osqzss/gps-sdr-sim
Apparently you can give it a trajectory as a csv file of ECEF
coordinates at 10 Hz and it will create baseband GPS simulation
through GNU Radio.
-Nathan
Woah, that's fascinating.
We would need to get one of the other GPS boards streaming IQ data
reliably--which we really want to do anyway. It's too far of a trip to
take just for this, I think. Depends on how crazy we're feeling.
Might as well record somewhere high up in Portland (Skyline?) just i
I've been looking into the partial data loss issue we experienced from
Launch 12.
Background
All the sensor data on the rocket are sent via UDP packets to the flight
computer. Most of the sensors are physically on an ethernet link from a
microcontroller somewhere on the rocket.
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