a SATELLITE COMMONS

[spectre]

http://spectrevision.net/2012/01/06/a-satellite-commons/

CALL for HACKER SPACE PROGRAM
http://events.ccc.de/camp/2011/wiki/Call_for_Space_Program
http://www.ccc.de/en/

the HACKERSPACE GLOBAL GRID (HGG)
http://shackspace.de/wiki/doku.php?id=project:hgg:open_tasks
http://www.bbc.co.uk/news/technology-16367042
Hackers plan space satellites to combat censorship
by David Meyer / 4 January 2012

The scheme was outlined at the Chaos Communication Congress in Berlin.
The project's organisers said the Hackerspace Global Grid will also
involve developing a grid of ground stations to track and communicate
with the satellites. Longer term they hope to help put an amateur
astronaut on the moon. Hobbyists have already put a few small
satellites into orbit - usually only for brief periods of time - but
tracking the devices has proved difficult for low-budget projects. The
hacker activist Nick Farr first put out calls for people to contribute
to the project in August. He said that the increasing threat of
internet censorship had motivated the project. "The first goal is an
uncensorable internet in space. Let's take the internet out of the
control of terrestrial entities," Mr Farr said. He cited the proposed
Stop Online Piracy Act (SOPA) in the United States as an example of
the kind of threat facing online freedom. If passed, the act would
allow for some sites to be blocked on copyright grounds.

Beyond balloons
Although space missions have been the preserve of national agencies
and large companies, amateur enthusiasts have launched objects into
the heavens. High-altitude balloons have also been used to place
cameras and other equipment into what is termed "near space". The
balloons can linger for extended amounts of time - but are not
suitable for satellites. The amateur radio satellite Arissat-1 was
deployed into low earth orbit last year via a spacewalk by two Russian
cosmonauts from the International Space Station as part of an
educational project. Students and academics have also launched other
objects by piggybacking official rocket launches. However, these
devices have often proved tricky to pinpoint precisely from the
ground. According to Armin Bauer, a 26-year-old enthusiast from
Stuttgart who is working on the Hackerspace Global Grid, this is
largely due to lack of funding. "Professionals can track satellites
from ground stations, but usually they don't have to because, if you
pay a large sum [to send the satellite up on a rocket], they put it in
an exact place," Mr Bauer said. In the long run, a wider hacker
aerospace project aims to put an amateur astronaut onto the moon
within the next 23 years. "It is very ambitious so we said let's try
something smaller first," Mr Bauer added.

Ground network
The Berlin conference was the latest meeting held by the Chaos
Computer Club, a decades-old German hacker group that has proven
influential not only for those interested in exploiting or improving
computer security, but also for people who enjoy tinkering with
hardware and software. When Mr Farr called for contributions to
Hackerspace, Mr Bauer and others decided to concentrate on the
communications infrastructure aspect of the scheme. He and his
teammates are working on their part of the project together with
Constellation, an existing German aerospace research initiative that
mostly consists of interlinked student projects. In the open-source
spirit of Hackerspace, Mr Bauer and some friends came up with the idea
of a distributed network of low-cost ground stations that can be
bought or built by individuals. Used together in a global network,
these stations would be able to pinpoint satellites at any given time,
while also making it easier and more reliable for fast-moving
satellites to send data back to earth. "It's kind of a reverse GPS,"
Mr Bauer said. "GPS uses satellites to calculate where we are, and
this tells us where the satellites are. We would use GPS co-ordinates
but also improve on them by using fixed sites in precisely-known
locations." Mr Bauer said the team would have three prototype ground
stations in place in the first half of 2012, and hoped to give away
some working models at the next Chaos Communication Congress in a
year's time. They would also sell the devices on a non-profit basis.
"We're aiming for 100 euros (£84) per ground station. That is the
amount people tell us they would be willing to spend," Mr Bauer added.

Complications
Experts say the satellite project is feasible, but could be restricted
by technical limitations. "Low earth orbit satellites such as have
been launched by amateurs so far, do not stay in a single place but
rather orbit, typically every 90 minutes," said Prof Alan Woodward
from the computing department at the University of Surrey. "That's not
to say they can't be used for communications but obviously only for
the relatively brief periods that they are in your view. It's
difficult to see how such satellites could be used as a viable
communications grid other than in bursts, even if there were a
significant number in your constellation." This problem could be
avoided if the hackers managed to put their satellites into
geostationary orbits above the equator. This would allow them to match
the earth's movement and appear to be motionless when viewed from the
ground. However, this would pose a different problem. "It means that
they are so far from earth that there is an appreciable delay on any
signal, which can interfere with certain Internet applications," Prof
Woodward said. "There is also an interesting legal dimension in that
outer space is not governed by the countries over which it floats. So,
theoretically it could be a place for illegal communication to thrive.
However, the corollary is that any country could take the law into
their own hands and disable the satellites."

Need for knowledge
Apart from the ground station scheme, other aspects of the Hackerspace
project that are being worked on include the development of new
electronics that can survive in space, and the launch vehicles that
can get them there in the first place. According to Mr Farr, the "only
motive" of the Hackerspace Global Grid is knowledge. He said many
participants are frustrated that no person has been sent past low
Earth orbit since the Apollo 17 mission in 1972. "This [hacker]
community can put humanity back in space in a meaningful way," Farr
said. "The goal is to get back to where we were in the 1970s. Hackers
find it offensive that we've had the technology since before many of
us were born and we haven't gone back." Asked whether some might see
negative security implications in the idea of establishing a hacker
presence in space, Farr said the only downside would be that "people
might not be able to censor your internet. Hackers are about open
information," Farr added. "We believe communication is a human right."

PREVIOUSLY on SPECTRE
CONSUMER USE: SURREY SATELLITES (SSTL)
http://spectregroup.wordpress.com/2008/07/16/consumer-satellite-use/
DIY PERSONAL SATELLITES
http://spectregroup.wordpress.com/2010/08/05/diy-personal-satellites/
SATELLITE HACKS
http://spectregroup.wordpress.com/2009/10/02/sat-hacks/
BRAZILIAN SATELLITE SQUATTERS
http://spectregroup.wordpress.com/2009/04/24/brazilian-satellite-squatters/
RUSSIANS LAUNCHING SATELLITES from SUBS
http://spectregroup.wordpress.com/2007/07/10/russians-launching-satellites-from-subs/
COWS as COMPASS
http://spectregroup.wordpress.com/2008/08/28/cows-as-compass/
SOLAR FLARES: a CARRINGTON EVENT
http://spectregroup.wordpress.com/2010/05/12/a-carrington-event/
EARTH WILL HAVE RINGS
http://spectregroup.wordpress.com/2008/03/24/earth-will-have-rings-2/

DIY SATELLITE INTERNET
http://www.zdnet.com/news/hackers-aim-to-launch-internet-satellite-network-moon-mission/6335491
by David Meyer / January 3, 2012

Hackers have announced work on a ground station scheme that would make
amateur satellites more viable, as part of an aerospace scheme that
ultimately aims for the moon. The Hackerspace Global Grid (HGG)
project hopes to make it possible for amateurs to more accurately
track the home-brewed satellites. As these devices tend to be launched
by balloon, they are not placed at a precise point in orbit as
professional satellites deployed by rocket usually are. Armin Bauer,
one of the three German hobbyists involved in the HGG, said at the
Chaos Communication Congress in Berlin that the system involved a
reversal of the standard GPS technique. The scheme was announced at
the event, which is Europe's largest hacker conference. "GPS uses
satellites to calculate where we are, and this tells us where the
satellites are," Bauer said on Friday, according to the BBC. "We would
use GPS co-ordinates but also improve on them by using fixed sites in
precisely-known locations."

According to the HGG website, enthusiasts would site the ground
stations using coordinates not only from the US's GPS system, but also
those from the EU's Galileo, Russia's GLONASS and ground surveys. A
major aim of the wider 'Hacker Space Program' is to create a satellite
system for internet communication that is uncensorable by any country.
The hackers also want to put someone on the moon by 2034 — something
that has not been done since the Apollo 17 mission 39 years ago. Bauer
described the moon mission as "very ambitious". As for the anti-
censorship aspects of the scheme, the HGG team said on their site that
they are "not yet in a technical position to discuss details". They
also noted that the modular ground stations, which are intended to
work out at a non-profit sales price of €100 (£84) each, would be able
to work without the internet. "Then you will have to deploy four
receiver stations and connect them to your laptop(s) or collect all
storage media added to them, where all received data is stored on,"
the team wrote. "Then you have to manage the data handling and
processing by your own." However, internet connectivity is the plan
for most of the HGG's usage. The team is working on the project
alongside Constellation, an German aerospace research platform for
academics that would use the distributed network to derive crucial
data.

According to Bauer and his colleagues, the internet connectivity would
be of "bare minimum" bandwidth that would be enough to keep basic
communications going if needed. "The first step is establishing a
means of accurate synchronisation for the distributed network," the
team explained. "Next up are building various receiver modules (ADS-B,
amateur satellites, etc) and data processing of received signals. A
communication/control channel (read: sending data) is a future
possibility but there are no fixed plans on how this could be
implemented yet." The HGG team hopes to have working prototypes in the
first half of the year, with production units ready for distribution
by the end of 2012. These would be sold, but people would be able to
build their own as well. If the Hacker Space Program really does take
off, the satellites would be out of any country's legal jurisdiction,
but this would also leave any country that is capable of doing so free
to disable them in some way. The HGG team admitted on their site that
there would nothing they could do to stop this happening. "Since we
don't have actual satellites yet, this falls in the category of
problems we're going to solve once they occur," they wrote. "We're
doing this because we want to and because it's fun. We're trying to
concentrate on reasons why this will work, not why it won't."

http://www.youtube.com/watch?v=iuwkzNjaPwc
http://aerospaceresearch.net/constellation/

INFRASTRUCTURE NEEDS - GROUND STATIONS
http://shackspace.de/wiki/doku.php?id=project:hgg:faq
http://shackspace.de/wiki/doku.php?id=project:hgg
http://events.ccc.de/congress/2011/Fahrplan/attachments/2043_slides.pdf
http://events.ccc.de/congress/2011/Fahrplan/track/Hacking/4699.en.html
Building a Distributed Satellite Ground Station Network - A Call To
Arms
Hackers need satellites. Hackers need internet over satellites.
Satellites require ground stations. Let's build them!

As proposed by Nick Farr et al at CCCamp11, we - the hacker community
- are in desperate need for our own communication infrastructure. So
here we are, answering the call for the Hacker Space Program with our
proposal of a distributed satellite communications ground station
network. An affordable way to bring satellite communications to a
hackerspace near you. We're proposing a multi-step approach to work
towards this goal by setting up a distributed network of ground
stations which will ensure a 24/7 communication window - first
tracking, then communicating with satellites. The current state of a
proof of concept implementation will be presented. This is a project
closely related to the academic femto-satellite movement, ham radio,
Constellation@Home.

The area of small satellites (femto-satellite <0.1 kg up to mini-
satellite 100-500 kg) is currently pressed forward by Universities and
enables scientific research at a small budget. Gathered data, both
scientific and operational, requires communication between satellites
and ground stations as well as to the final recipients of the data.
One either has to establish own transmission stations or rent already
existing stations. The project “distributed ground station” is an
extension to the project which will offer, at its final expansion
state, the ability to receive data from satellites and relay them to
the final recepients. It is therefore proposed that a world-wide
distributed network of antennas is to be set up which will be
connected via the internet allowing the forwarding of received signals
to a central server which will in turn forward signals to further
recepients. Individual antennas will be set up by volunteers (Citizen
Scientists) and partner institutions (Universities, institutes,
companies). The core objective of the project is to develop an
affordable hardware platform (antenna and receiver) to be connected to
home computers as well as the required software. This platform should
enable everyone to receive signals from femto-satellites at a budget
and in doing so, eradicating black patches where there is currently no
ground station to receive signals of satellites passing over-head.
Emphasise is put on contributions by volunteers and ham radio
operators who can contribute both passively by setting up a receiver
station or actively by shaping the project making it a community
driven effort powered by open-source hardware and applications.

Purposes The distributed ground stations will enable many different
uses. Using distributed ground stations one could receive beacon
signals of satellites and triangulate their position and trajectory.
It would therefore be possible to determine the kepler elements right
after launching of a new satellite without having to rely on official
reports made at low frequency. Beacon tracking is also not limited to
just satellites but can be used to track other objects like weather
balloons and areal drones and record their flight paths. Additionally,
beacon signals (sender ID, time, transmission power) could be
augmented with house-keeping data to allow troubleshooting in cases
where a main data feed is interrupted. Details regarding the protocol
and maximum data packet length are to be defined during the
feasibility study phase. Furthermore, distributed ground stations can
be used as "data dumping" receivers. This can be used to reduce load
on the main ground station as well as to more quickly distribute data
to final recipients. The FunCube project, an out-reach project to
schools, is already using a similar approach. Another expansion stage
would be increasing the bandwidth of the individual receivers. As a
side-effect, distributed ground station could also be used to analyse
meteorite scattering and study effects in the ionosphere by having a
ground-based sender with a known beacon signal to be reflected off
meteorites and/or the iononosphere and in turn received by the
distributed ground stations. Depending on the frequency used further
applications in the field of atmospheric research, eg. local and
regional properties of the air and storm clouds, can be imagined.
Depending on local laws and guidelines, antennas could also be used to
transmit signals. The concept suggests the following expansion stages:

Feasibility study for the individual expansion stages
Beacon-Tracking and sender triangulation
Low-bandwidth satellite-data receiver (up to 10 Kbit/s)
High-bandwidth satellite-data receiver (up to 10 Mbit/s)

Support for data transmission Each stage is again split up into sub-
projects to deal with hardware and software design and develoment,
prototyping, testing and batch/mass production, Network The networking
concept demands that all distributed ground stations are to be
connected via the internet. This can be achieved using the
Constellation platform. Constellation is a distributed computing
project used already for various simulations related to aerospace
applications. The system is based on computation power donated by
volunteers which is combined to effectively build a world-wide
distributed super-computer. The software used to do this is BOINC
(Berkeley Open Infrastructure for Network Computing) which also offers
support for additional hardware to eg. establish a sensor network.
Another BOINC-project is the Quake Quatcher Network which is using
accelleration sensors built into laptops or custom USB-dongles to
detected earthquakes. Constellation could be enhanced to allow use of
the distributed ground station hardware. Constellation is an academic
student group of the DGLR (german aerospace society) at Stuttgart
University and is supported by Rechenkraft.net e.V and Selfnet e.V..
Ham radio and volunteers Special consideration is given to the ham
radio community. Femto-satellites make use of the ham radio bands in
the UHF, VHF, and S-Band range. As a part of the ham radio community
ham radio operators should be treated as part of the network. Ham
radio operators hold all required knowledge about the technology
required to operate radio equipment and are also well distributed
world-wide. To also make the system attractive to volunteers, hardware
should be designed in a way that allows manufacturing and distribution
on a budget. All designs should also be made public to allow own and
improved builds of the system by the community. The hardware should be
designed to be simple to use correctly and hard to be used
wrong.Supporters
[1] Constellation Plattform, aerospaceresearch.net/constellation [2]
shackspace Stuttgart, www.shackspace.de References [1] IRS
Kleinsatelliten, Universität Stuttgart, kleinsatelliten.de [2]
Constellation Plattform, aerospaceresearch.net/constellation [3]
BOINC, Berkely University, boinc.edu [4] Quake Catcher Network,
qcn.stanford.eu [5] DGLR Bezirksgruppe Stuttgart, stuttgart.dglr.de
[6] Rechenkraft.net e.V., rechenkraft.net [7] Selfnet e.V., selfnet.de