On Feb 25, 2021, at 6:02 PM, Steve Jones
<thatoneguyst...@gmail.com
<mailto:thatoneguyst...@gmail.com>> wrote:
Who controls the parking spots? And what if you just decide
to put one there? I'd like to have Elon dough where I could
just get in a parking spot fight in space for spite. I wonder
if alec Baldwin is the enforcer, he just punches you in the
face if you take a spot.
On Thu, Feb 25, 2021, 4:30 PM Brian Webster
<i...@wirelessmapping.com <mailto:i...@wirelessmapping.com>>
wrote:
Matt,
Looking at your post on Facebook, I think you have
misunderstood the Geostationary definition. There is only
one orbit height that rotates around the earth at the
same speed as the Earth rotates and it is located at the
equator. That is called the Clarke Belt and it is 22,236
miles above the earth. Your question about a Leo and it
being Geostationary are contradictions in terms. In the
Clarke belt since it’s just one line of “parking spots”
around the earth (at the equator only), one does not just
set up their own. They are very coveted spots in the belt
and only the expensive birds reside there. At 22,236
miles above the earth, a Cambium radio or similar device
won’t have enough power to reach back to a CPE. In
addition to that and you will have high latency just like
the current geostationary satellite systems do. That
radio signal has to travel 44,472 miles, hence the
latency people complain about.
https://en.wikipedia.org/wiki/Geostationary_orbit
<https://en.wikipedia.org/wiki/Geostationary_orbit>
Thank you,
Brian Webster
www.wirelessmapping.com <http://www.wirelessmapping.com/>
*From:*AF [mailto:af-boun...@af.afmug.com
<mailto:af-boun...@af.afmug.com>] *On Behalf Of *Robert
*Sent:* Thursday, February 25, 2021 4:31 PM
*To:* af@af.afmug.com <mailto:af@af.afmug.com>
*Subject:* Re: [AFMUG] Your Own Satellite Internet
Yes, Look up the various "xxxxStats" that have been
tethered at the borders over the years with balloons for
radar coverage of low flying aircraft and the NOTAMS that
are posted for them. They have a very large ( relatively
) exclusion zone and you have to worry about said tethers
falling and doing damage on the way down.
On 2/25/21 11:39 AM, Jason McKemie wrote:
Those tethers would be a nightmare for aviation.
On Thu, Feb 25, 2021 at 1:31 PM Brian Webster
<i...@wirelessmapping.com
<mailto:i...@wirelessmapping.com>> wrote:
One also has to calculate the window that your
satellite is visible on the ground of your target
service area based on the altitude you will have
the bird orbiting. Many times any of the Amateur
radio satellites only have a 10 or 15 minute
window of visibility a few times a day. For 24/7
internet service you need to have many orbital
object/satellites such that when one move out of
view another is there for the handoff. The lower
orbit you have, the smaller window you have. So a
LEO small footprint coverage is still going to
take a lot of satellites just to cover you small
territory. How many all depends on the area and
altitude. Since your satellite is not going to be
in a stationary orbit, I am sure you need
international cooperation to file for all the
orbits you need to just cover your small
footprint in the US because that orbit goes all
the way around the earth and has effect on others
who might need a similar orbit. A good portion of
the time your satellite is flying through the sky
for your local footprint, it’s not going to be
doing much of anything because it’s not visible
to any of your customers. Until we get some sort
of tethered satellite solution that is tied to
the ground and centrifugal force hold the
satellite in place, these are the laws of physics
one has to contend with. If someone can invest a
very lightweight tethering string of some sort
that when it is long enough the total weight of
said string does not overcome the amount of
centrifugal force achieved at your desired height
to allow the radio/satellite to stay in place
without needing to be an orbital object. If that
is invested and it also allows for transmission
of adequate power and data, that could be a real
game changer. As far as I know 90,000 feet of
something to be a good tether weighs more than
the force that could keep the device flung out
that far.
File:Iridium Coverage Animation.gif
Here is an animated version of this graphic
https://commons.wikimedia.org/wiki/File:Iridium_Coverage_Animation.gif
<https://commons.wikimedia.org/wiki/File:Iridium_Coverage_Animation.gif>
If you want to get an idea of satellite
visibilities and the number of times per day you
can view it, this program is a great satellite
prediction and tracking program
http://gpredict.oz9aec.net/
<http://gpredict.oz9aec.net/>
Gpredict: Free, Real-Time Satellite Tracking and
Orbit Prediction Software
Here is a short video that does a decent job of
illustrating the complexity of orbital mechanics
one has to consider. Earth rotation, orbit
direction, power consideration if you want to be
sun synchronous etc.
https://www.youtube.com/watch?v=omv38sEBxk8&feature=emb_logo
<https://www.youtube.com/watch?v=omv38sEBxk8&feature=emb_logo>
Thank you,
Brian Webster
www.wirelessmapping.com
<http://www.wirelessmapping.com/>
*From:*AF [mailto:af-boun...@af.afmug.com
<mailto:af-boun...@af.afmug.com>] *On Behalf Of
*Carl Peterson
*Sent:* Thursday, February 25, 2021 1:43 PM
*To:* AnimalFarm Microwave Users Group
*Subject:* Re: [AFMUG] Your Own Satellite Internet
As Adam points out, your satellite isn't just
going to float there. It needs a lot of speed.
That speed would have it moving "past" you really
really fast until you got to about 26k miles up
where it would remain still relative to you. If
you wanted it to float at 90k' you would need a
balloon or something like that but that's a loony
idea.
On Thu, Feb 25, 2021 at 12:34 PM Adam Moffett
<dmmoff...@gmail.com
<mailto:dmmoff...@gmail.com>> wrote:
I know a guy I could ask.
On 2/25/2021 1:20 PM, Steve Jones wrote:
can you get hot pockets on jail
commissaries?
On Thu, Feb 25, 2021 at 12:08 PM Adam
Moffett <dmmoff...@gmail.com
<mailto:dmmoff...@gmail.com>> wrote:
well....Aiming at thousand foot tower
from close range customers we are
definitely sometimes more than 3
degrees up. Put me in jail I guess.
On 2/25/2021 1:02 PM, Matt Hopkins wrote:
If I recall correctly it is
illegal to aim a 5GHz radio > 3°
above the horizon.
On Thu, Feb 25, 2021 at 9:43 AM
Matt Hoppes
<mattli...@rivervalleyinternet.net
<mailto:mattli...@rivervalleyinternet.net>>
wrote:
So here me out. I've been
to low earth orbit (90,000
feet) with
equipment I can get in my
basement/hardware store.
I've beamed signals
back from 90,000 feet to a
radio in my truck.
I'm familiar with how AmSats
work (although have not sent
one up myself).
What is preventing a WISP
from putting together a solar
powered GeoSync
satellite that has a few
Cambium Spots on it to fully
cover your
coverage area?
Yes, you'd have capacity
issues if you didn't plan it
correctly, but is
there technically any reason
I can't run a 5GHz link to a
satellite?
Do you have to pay a "rental"
fee to occupy a space in
space to park
your bird?
Yes, I realize there would be
latency, but if you keep the
throughput
there (something Hughes
Doesn't Do), the experience
wouldn't be half bad
for most things..
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