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CX2SA > SATDIG 12.02.14 17:24l 748 Lines 24150 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Interesting CubeSat Study (M5AKA)
2. FUNcube Data warehouse (David A B Johnson)
3. Satellite contact logging question (Tom Worthington)
4. Re: Satellite contact logging question (Paul Stoetzer)
5. Another Great Tech Tuesday Net (Clint Bradford)
6. Yuma (Arizona) Hamfest, 14-15 February 2014
(Patrick STODDARD (WD9EWK/VA7EWK))
7. DM32 activity around Yuma Hamfest later this week
(Patrick STODDARD (WD9EWK/VA7EWK))
8. Re: Satellite contact logging question (Bruce)
9. Re: ISS sats deployed? (M5AKA)
10. Re: 150 cubesats to provide global WIFI multicasting
(Fabio Azzarello)
11. USB tracking solution (kb2m@xxxxxxx.xxxx
12. Re: 150 cubesats to provide global WIFI multicasting
(Michael R. Lengruesser)
13. Fwd: Re: Re: 150 cubesats to provide global WIFI multicasting
(Michael R. Lengruesser)
----------------------------------------------------------------------
Message: 1
Date: Tue, 11 Feb 2014 19:59:48 +0000 (GMT)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: Amsat BB <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Re: Interesting CubeSat Study
Message-ID:
<1392148788.69237.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
> they estimate between 2014 and 2020 there will be at least 2,000 CubeSats
looking for launches.
> If that's true, whoa!
That would mean over $200,000,000 in launch fees it'll certainly help drive
the launch market. At the moment there just aren't enough launchers.
When I heard that Planet Labs were going to deploy their constellation of
CubeSats from the ISS it struck me as odd since their Dove satellites have a
design lifetime of 2+ years so why stick them in a very low orbit where
they'd burn up in just 6 months. I guess the answer is simple - there is no
alternative - it's unlikely they could buy a higher altitude launch this
year or next for 28 3U CubeSats.
It's good to see the likes of Alcantara Cyclone Space developing new launch
facilities in Brazil which may come onstream in 2016. Lets hope more
enterprises around the world get into the launch business.
73 Trevor M5AKA
On Tuesday, 11 February 2014, 19:14, Bryce Salmi <bstguitarist@xxxxx.xxx>
wrote:
http://www.sei.aero/eng/papers/uploads/archive/SpaceWorks_Nano_Microsatellite_
Market_Assessment_January_2014.pdf
Really goes to show you the demand of CubeSats and what market AMSAT is
participating in. Taking this article for being correct, they estimate
between 2014 and 2020 there will be at least 2,000 CubeSats looking for
launches. If that's true, whoa!
Bryce
KB1LQC
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Tue, 11 Feb 2014 21:51:22 +0000
From: David A B Johnson <dave@xxxxx.xx.xx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>, EU_AMSAT@xxxxxxxxxxx.xx.xx
Subject: [amsat-bb] FUNcube Data warehouse
Message-ID: <52FA9B5A.1080304@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
You might find that the Realtime MinMax values look a bit strange this
evening while I do some tests on the
date range.
I'll fix them up when I've finished.
- Dave, G4DPZ
------------------------------
Message: 3
Date: Tue, 11 Feb 2014 17:31:19 -1000
From: "Tom Worthington" <worth@xxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Satellite contact logging question
Message-ID: <000801cf27a2$e57159f0$b0540dd0$@xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I made some satellite contacts as W1AW/KH6 last week. How can I generate
the proper ADIF formatted log?
I normally just log satellite contacts by hand and then send real cards.
73, Tom NH6Y
------------------------------
Message: 4
Date: Tue, 11 Feb 2014 22:48:38 -0500
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Tom Worthington <worth@xxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Satellite contact logging question
Message-ID:
<CABzOSOrAP9e524OLEcjTN1EF++wghZXoeLphVDUZaFDJX9aVAw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Tom,
Here is the info for formatting an ADIF file properly for satellite:
http://www.arrl.org/files/file/LoTW%20Instructions/N5JB.pdf
I use DXKeeper for logging my satellite contacts. I'm sure others have
their own preferences.
73,
Paul, N8HM
On Tue, Feb 11, 2014 at 10:31 PM, Tom Worthington <worth@xxxx.xxx> wrote:
> I made some satellite contacts as W1AW/KH6 last week. How can I generate
> the proper ADIF formatted log?
>
> I normally just log satellite contacts by hand and then send real cards.
>
> 73, Tom NH6Y
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Tue, 11 Feb 2014 20:38:18 -0800
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Another Great Tech Tuesday Net
Message-ID: <648AB0C8-3E32-4323-B6A0-7438B7F6C9F6@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
LIVE from 8805 feet of elevation of the Big Bear (CA) amateur repeater this
evening -
we conducted our weekly "Tech Tuesday" net - with my ten-minute "Satellites"
segment.
We discussed today's deployments from the ISS - and what else is scheduled
for the
rest of the week from the Expedition 38 crew.
We also leaned how to pronounce "LituanicaSAT-1" (grin) and learn where its
home
country is on the planet.
We discussed the modes and frequencies for the four new ham satellites that
astronaut
Koichi Wakata KC5ZTA will be deploying - CubeSats that were launched from
the Wallops
Flight Facility, VA to the International Space Station (ISS) in the Cygnus
freighter on
January 9.
We conduct this satellite session every Tuesday night at 7PM Pacific time.
The Big Bear
Amateur Radio Club club was established in 1975, and this "Tech Tuesday Net"
is right
in alignment with their stated mission to educate and stimulate interest in
amateur radio.
The BBARC is an affiliated club member of the American Radio Relay League,
and its
prestigious, high-level two meter repeater on 147.330 +.600 131.8 is heard
from Mexico
to Ventura, and from Catalina Island to Western Arizona.
Tech Tuesday will be taking a two-week hiatus - come join us on Tuesday,
March 4,
2014 for another installment!
SITES CITED THIS EVENING:
http://www.bbarc.org/
http://www.amsat-uk.org
http://funcube.org.uk/
http://www.work-sat.com
https://www.facebook.com/Lituanicasat1
https://twitter.com/Astro_Wakata
http://amsat-uk.org/2014/01/31/video-deploying-cubesats-from-the-space-station
/
http://m.ustream.tv/channel/live-iss-stream
Clint Bradford K6LCS
k6lcs@xxxxxxx.xxxx
------------------------------
Message: 6
Date: Tue, 11 Feb 2014 20:48:38 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Yuma (Arizona) Hamfest, 14-15 February 2014
Message-ID:
<1392180518.10187.YahooMailBasic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
I will have an AMSAT booth at the Yuma (Arizona) Hamfest later
this week, on Friday and Saturday (14-15 February 2014). This
will be the 6th year I have made the trip to Yuma to host an
AMSAT booth. The AMSAT booth will be in the main hall at the
hamfest site, the Yuma County Fairgrounds - south of the I-8
freeway, across the street from Yuma International Airport and
Marine Corps Air Station Yuma. More information about the
hamfest is available at:
http://www.yumahamfest.org/
During the hamfest, Friday afternoon and all day Saturday,
WD9EWK will be on various satellite passes from outside the
main hall. Yuma is in grid DM22, for those interested in grids
via satellite. Please call me if you hear WD9EWK on the passes,
and be a part of the satellite demonstrations. Not knowing if I
can get outside for every possible pass during the hamfest, I will
try to post updates to this mailing list of when I will be on the air.
I should not have a problem with weather out there, as it could
reach 91F/33C on Saturday afternoon. In mid-February! Also
keep an eye on my Twitter feed @xxxxxx - or use
http://twitter.com/WD9EWK if you aren't on Twitter - as I can
quickly post updates that way from my mobile phone.
I will upload all QSOs made from the Yuma Hamfest to Logbook
of the World. Please e-mail me directly with QSO details if you
would like to receive a WD9EWK QSL for our QSO. No need to
send me a card or SASE. The printer at home is ready to print
some QSL cards. :-)
Thanks, and 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
P.S.: This hamfest, along with other hamfests and events with an
AMSAT presence, are listed at: http://ww2.amsat.org/?page_id=218
on the AMSAT web site.
------------------------------
Message: 7
Date: Tue, 11 Feb 2014 21:20:51 -0800 (PST)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] DM32 activity around Yuma Hamfest later this week
Message-ID:
<1392182451.33905.YahooMailBasic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
I don't know when I will drive out to Yuma on Thursday in advance
of the hamfest. I will keep a printout of upcoming passes in the
car, so I can try to work from grid DM32 as I drive out there. I plan
on driving home on Sunday morning, and I should be able to work
passes for a couple of hours from somewhere in grid DM32. Since
there isn't much in grid DM32, and almost nothing between the I-8
freeway and the Mexican border except for an Air Force bombing
range, I won't plan on setting up out there before sunrise. I might
try to work from the DM22/DM32 boundary on the north side of I-8,
a place I have worked from many times in the past, about 25
miles/40km east of Yuma.
Depending on APRS coverage east of Yuma along the freeway, you
may be able to see my location on http://aprs.fi/WD9EWK-9 as I
drive out there. I'll also post updates on my Twitter feed @xxxxxx
which can also be seen at http://twitter.com/WD9EWK if you don't
use Twitter.
Just like with QSOs I make at hamfests, including at the upcoming
Yuma hamfest, I will upload my log to Logbook of the World. Anyone
wanting a QSL card for working me can just e-mail me the QSO
details. I'll be happy to send you a card if you're in the log. No SASE
needed.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 8
Date: Tue, 11 Feb 2014 23:26:27 -0600
From: Bruce <kk5do@xxxxx.xxx>
To: Paul Stoetzer <n8hm@xxxx.xxx>, Tom Worthington <worth@xxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Satellite contact logging question
Message-ID: <52FB0603.3060904@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
only problem with dxkeeper and dxlab stuff is that if you have microsoft
office 2013 professional loaded, their software will not run. they use
an older version of one of the drivers that microsoft no longer
supports. i think it is one of the drivers for an older version of
access. i went around and around with them and they suggested to wipe my
hard drive, load windows and then load their software if it works then
don't load the other stuff. uh huh.
73...bruce
On 2/11/2014 9:48 PM, Paul Stoetzer wrote:
> Tom,
>
> Here is the info for formatting an ADIF file properly for satellite:
>
> http://www.arrl.org/files/file/LoTW%20Instructions/N5JB.pdf
>
> I use DXKeeper for logging my satellite contacts. I'm sure others have
> their own preferences.
>
> 73,
>
> Paul, N8HM
>
> On Tue, Feb 11, 2014 at 10:31 PM, Tom Worthington <worth@xxxx.xxx> wrote:
>> I made some satellite contacts as W1AW/KH6 last week. How can I generate
>> the proper ADIF formatted log?
>>
>> I normally just log satellite contacts by hand and then send real cards.
>>
>> 73, Tom NH6Y
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
--
Bruce Paige, KK5DO
AMSAT Director Contests and Awards
ARRL Awards Manager (WAS, 5BWAS, VUCC), VE
Houston AMSAT Net - Wed 0200z on Echolink - Conference *AMSAT*
Also live streaming MP3 at http://www.amsatnet.com
Podcast at http://www.amsatnet.com/podcast.xml or iTunes
Latest satellite news on the ARRL Audio News
http://www.arrl.org
AMSAT on Twitter http://www.twitter.com/amsat
------------------------------
Message: 9
Date: Wed, 12 Feb 2014 09:33:25 +0000 (GMT)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: ISS sats deployed?
Message-ID:
<1392197605.86447.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Looks like Planet Lab CubeSats 5 and 6 failed to deploy, 7 and 8 went
earlier this morning.
http://amsat-uk.org/2014/02/11/cubesats-deployed-from-international-space-stat
ion/
----
73 Trevor M5AKA
AMSAT-UK
website http://amsat-uk.org/
Facebook https://www.facebook.com/pages/AMSAT-UK/208113275898396
Twitter https://twitter.com/AMSAT_UK
----
On Tuesday, 11 February 2014, 16:00, Andrew Glasbrenner
<glasbrenner@xxxxxxxxxx.xxx> wrote:
So far, looks like just two of the PlanetLabs cubesats...
73, Drew KO4MA
-----Original Message-----
>From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
>Sent: Feb 11, 2014 9:17 AM
>To: amsat-bb <amsat-bb@xxxxx.xxx>
>Subject: [amsat-bb] ISS sats deployed?
>
>A tweet from Nanoracks indicates the first batch of cubesats have been
deployed from ISS. I'm
trying to confirm if the amateur radio ones are in this batch, including
the two Lithuanian ones with repeater/transponders. Freqs for these are on
the AMSAT.org front page news item, if you get a chance to listen.
>
>73, Drew
>
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the
amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Wed, 12 Feb 2014 15:45:02 +0100
From: Fabio Azzarello <iz5xrc@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Cc: Howie DeFelice <howied231@xxxxxxx.xxx>
Subject: [amsat-bb] Re: 150 cubesats to provide global WIFI
multicasting
Message-ID:
<CAHOPMN1PWjZKgjd0GNt=VECcPnhwAEsovZcdqO90jjnyc=uFeQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello everybody,
I agree with Trevor, GS requirement for the 2.4 GHz band are quite
"challenging".
Anyway, I have another question, what kind of orbit this constellation will
be designed for?
If it is less than 500 km, how many *months* will it last?
73s
Fabio
iz5xrc
On Mon, Feb 10, 2014 at 8:43 PM, M5AKA <m5aka@xxxxx.xx.xx> wrote:
> Yes, a dish needed, ISS HamTV provides a good illustration of the
> requirements to achieve a 2 Mbps downlink at 2400 MHz.
>
>
> 73 Trevor M5AKA
>
>
>
>
> On Monday, 10 February 2014, 18:16, Howie DeFelice <howied231@xxxxxxx.xxx>
> wrote:
>
> Just in case anyone was curious about the practicality of actually
> transmitting WiFi from a cubesat, I did a quick link budget. Based on
> typical 802.11 specs, the MDS of a receiver is about -90 dBm. The path loss
> at 2.4GHz between a ground station and a satellite overhead in a 600Km
> orbit is a little over 155 dB. Assuming a zero gain antenna on the typical
> WiFi client radio, the required EIRP from the cubesat is in the
> neighborhood of 4KW. I don't think we are quite there yet with current
> solar cell technology.... not to mention the difficulty keeping the PA cool
> :)
>
> - Howie AB2S
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 11
Date: Wed, 12 Feb 2014 15:44:25 +0000 (UTC)
From: kb2m@xxxxxxx.xxx
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] USB tracking solution
Message-ID:
<1207238703.68641.1392219865746.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello all. Even though I got the old ISA slotted PC to work once again with
XP, and my KCT card, I decided it'd time to retire my ISA XP machine for
another avalable computer in my down sizing shack. I found a 'spare to
someone's needs' LVB kit, and will assemble it in an AMSAT custom enclosure
I ordered from AMSAT this morning.
After reading all the emails about USB solutions I thought LVB Tracker was
my best solution I thank all who came up with alternative's, I didn't
realise there were so many possible choices. Thanks again...
73 Jeff KB2M
------------------------------
Message: 12
Date: Wed, 12 Feb 2014 17:06:33 +0100
From: "Michael R. Lengruesser" <mlengruesser@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: 150 cubesats to provide global WIFI
multicasting
Message-ID: <52FB9C09.2070003@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
HelloFabio,
fromexperiencewithFITSAT-1,thelaunchtook placefromtheISS( orbit ~ 400km).
Thelifetime willbeupapprox.9months.
But, thisisinfluencedbytheshapeandsizeof thesatellite.
73?s de
Michael, DD5ER
--
AMSAT-DL e.V.
-- International Satellites for
Communication, Science and Education --
mlengruesser@xxxxxxxx.xxx
http://www.amsat-dl.org
Am 12.02.2014 15:45, schrieb Fabio Azzarello:
> Hello everybody,
> I agree with Trevor, GS requirement for the 2.4 GHz band are quite
> "challenging".
>
> Anyway, I have another question, what kind of orbit this constellation will
> be designed for?
> If it is less than 500 km, how many *months* will it last?
>
> 73s
> Fabio
> iz5xrc
>
>
> On Mon, Feb 10, 2014 at 8:43 PM, M5AKA <m5aka@xxxxx.xx.xx> wrote:
>
>> Yes, a dish needed, ISS HamTV provides a good illustration of the
>> requirements to achieve a 2 Mbps downlink at 2400 MHz.
>>
>>
>> 73 Trevor M5AKA
>>
>>
>>
>>
>> On Monday, 10 February 2014, 18:16, Howie DeFelice <howied231@xxxxxxx.xxx>
>> wrote:
>>
>> Just in case anyone was curious about the practicality of actually
>> transmitting WiFi from a cubesat, I did a quick link budget. Based on
>> typical 802.11 specs, the MDS of a receiver is about -90 dBm. The path loss
>> at 2.4GHz between a ground station and a satellite overhead in a 600Km
>> orbit is a little over 155 dB. Assuming a zero gain antenna on the typical
>> WiFi client radio, the required EIRP from the cubesat is in the
>> neighborhood of 4KW. I don't think we are quite there yet with current
>> solar cell technology.... not to mention the difficulty keeping the PA cool
>> :)
>>
>> - Howie AB2S
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 13
Date: Wed, 12 Feb 2014 17:19:48 +0100
From: "Michael R. Lengruesser" <mlengruesser@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Fwd: Re: Re: 150 cubesats to provide global WIFI
multicasting
Message-ID: <52FB9F24.5070005@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello Fabio,
from experience with FITSAT-1,the launch took place from the ISS( orbit ~
400km).
The lifetime will be up approx. 9 months.
This is consistent with the observations of other satellites in this orbit
height.
But, this is influenced by the shape and size of the satellite.
73?s de
Michael, DD5ER
--
AMSAT-DL e.V.
-- International Satellites for
Communication, Science and Education --
mlengruesser@xxxxxxxx.xxx
http://www.amsat-dl.org
Am 12.02.2014 15:45, schrieb Fabio Azzarello:
> Hello everybody,
> I agree with Trevor, GS requirement for the 2.4 GHz band are quite
> "challenging".
>
> Anyway, I have another question, what kind of orbit this constellation will
> be designed for?
> If it is less than 500 km, how many *months* will it last?
>
> 73s
> Fabio
> iz5xrc
>
>
> On Mon, Feb 10, 2014 at 8:43 PM, M5AKA <m5aka@xxxxx.xx.xx> wrote:
>
>> Yes, a dish needed, ISS HamTV provides a good illustration of the
>> requirements to achieve a 2 Mbps downlink at 2400 MHz.
>>
>>
>> 73 Trevor M5AKA
>>
>>
>>
>>
>> On Monday, 10 February 2014, 18:16, Howie DeFelice <howied231@xxxxxxx.xxx>
>> wrote:
>>
>> Just in case anyone was curious about the practicality of actually
>> transmitting WiFi from a cubesat, I did a quick link budget. Based on
>> typical 802.11 specs, the MDS of a receiver is about -90 dBm. The path loss
>> at 2.4GHz between a ground station and a satellite overhead in a 600Km
>> orbit is a little over 155 dB. Assuming a zero gain antenna on the typical
>> WiFi client radio, the required EIRP from the cubesat is in the
>> neighborhood of 4KW. I don't think we are quite there yet with current
>> solar cell technology.... not to mention the difficulty keeping the PA cool
>> :)
>>
>> - Howie AB2S
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 9, Issue 52
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