How did you keep the balloons in place?
On 2/25/21 3:32 PM, Jaime Solorza wrote:
We worked on a project where they used untethered balloons with radio
transmitter for an oil field project. They used it while towers were
erected for licensed 900MHz links... company was out of Phoenix area.
They mostly did military related stuff...
I think the balloons went up to 65k feet...the box with gear was small..
On Thu, Feb 25, 2021, 12:40 PM Jason McKemie
<[email protected]
<mailto:[email protected]>> wrote:
Those tethers would be a nightmare for aviation.
On Thu, Feb 25, 2021 at 1:31 PM Brian Webster
<[email protected] <mailto:[email protected]>> 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.____
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File:Iridium Coverage Animation.gif____
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Here is an animated version of this graphic
https://commons.wikimedia.org/wiki/File:Iridium_Coverage_Animation.gif____
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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/____
Gpredict: Free, Real-Time Satellite Tracking and Orbit
Prediction Software____
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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____
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Thank you,____
Brian Webster____
www.wirelessmapping.com <http://www.wirelessmapping.com>____
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*From:*AF [mailto:[email protected]
<mailto:[email protected]>] *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.____
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On Thu, Feb 25, 2021 at 12:34 PM Adam Moffett
<[email protected] <mailto:[email protected]>> 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? ____
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On Thu, Feb 25, 2021 at 12:08 PM Adam Moffett
<[email protected] <mailto:[email protected]>>
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.____
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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.____
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On Thu, Feb 25, 2021 at 9:43 AM Matt Hoppes
<[email protected]
<mailto:[email protected]>>
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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-- ____
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*PORT NETWORKS*____
401 E Pratt St, Ste 2553____
Baltimore, MD 21202____
(410) 637-3707 ____
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