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CX2SA > SATDIG 10.02.14 21:03l 307 Lines 9675 Bytes #999 (0) @ WW
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Sent: 140210/2002Z @:CX2SA.SAL.URY.SA #:3366 [Salto] FBB7.00e $:AMSATBB950
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Colorado W1AW/0 Centennial QSO party Satellite operations.
(David W0DHB)
2. Re: 150 cubesats to provide global WIFI multicasting
(Howie DeFelice)
3. Re: W1AW/0 on Satellites (Rolf Krogstad)
4. Re: 150 cubesats to provide global WIFI multicasting
(Gregg Wonderly)
5. Re: W1AW/0 on Satellites (Rolf Krogstad)
6. Re: W1AW/0 on Satellites (Rolf Krogstad)
7. Re: 150 cubesats to provide global WIFI multicasting (M5AKA)
----------------------------------------------------------------------
Message: 1
Date: Sun, 9 Feb 2014 21:02:14 -0700
From: "David W0DHB" <dave@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Colorado W1AW/0 Centennial QSO party Satellite
operations.
Message-ID: <001d01cf2614$e267ab40$a73701c0$@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I looking for CO folks who would like to operate a satellite pass or passes
as W1AW/0 for the ARRL Centennial QSO party.
Colorado operations will be during the weeks starting 21 May 2014 and 16
July 2014 .
More info on the QSO party at http://www.arrl.org/centennial-qso-party
I'd sure like to get as a many operators in as many different CO grids as
possible.
Please contact me off of BB if you are interested.
Thanks
Dave W0DHB
------------------------------
Message: 2
Date: Mon, 10 Feb 2014 12:46:03 -0500
From: Howie DeFelice <howied231@xxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 150 cubesats to provide global WIFI
multicasting
Message-ID: <BLU169-W7891EEF573E3F33F74116AE7900@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
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
------------------------------
Message: 3
Date: Mon, 10 Feb 2014 11:48:11 -0600
From: Rolf Krogstad <rolf.krogstad@xxxxx.xxx>
To: "<AMSAT-BB@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: W1AW/0 on Satellites
Message-ID:
<CAJJyj=ZKabjyEwqhkJbKsASZmW7JKu40r=kxNVQnaMrHajrHpw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Yes.
Give me a call on my cell and we can find a time.
612-597-7249
73
Rolf NR0T
On Mon, Jan 27, 2014 at 12:35 PM, Rolf Krogstad
<rolf.krogstad@xxxxx.xxx>wrote:
> I will be operating on the satellites as W1AW/0 from the state of
> Minnesota (Grid EN34) from 0000z on Jan. 29th through 2359z on Feb. 4th.
>
> Operating times will be evenings and on Sunday, as work permits. I will
> work SSB and CW on the analog birds and FM on SO-50.
>
> QSL per the instructions on the ARRL website (copied below):
> http://www.arrl.org/centennial-qso-party
>
> 73
> Rolf NR0T
> Grid EN34
>
> ===============================================
> http://www.arrl.org/centennial-qso-party
> QSLs
> <http://www.arrl.org/centennial-qso-party#Top>
>
> QSL cards from W1??AW and W1AW operating portable will be sent
> automatically via the QSL Bureau system to each U.S.A. station who signs-up
> online to receive such cards [this form is not ready yet -- please watch
> for an announcement]. This is a one-time only use of the QSL Bureau for
> this purpose. QSLs will automatically be sent to stations outside the
> U.S.A. via the QSL Bureau as normal. QSLs may be requested directly also,
> with an SASE required for return.
>
>
>
>
>
------------------------------
Message: 4
Date: Mon, 10 Feb 2014 12:30:25 -0600
From: Gregg Wonderly <w5ggw@xxx.xxx>
To: Howie DeFelice <howied231@xxxxxxx.xxx>, "amsat-bb@xxxxx.xxxx
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 150 cubesats to provide global WIFI
multicasting
Message-ID: <52F91AC1.3010901@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
As the birds dropped out of the sky above the ground station, there might be
some objections. What has to happen for long range, gigabit bandwidth, is a
wide
frequency range with little time on any particular frequency so that there
is no
concentrated effects on a single frequency where heating would start to occur.
Frequency hopping over large spectrum is not a new thing, but it's something
that could alleviate a number of issues with safety.
Gregg Wonderly
W5GGW
On 2/10/2014 11:46 AM, Howie DeFelice 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
>
------------------------------
Message: 5
Date: Mon, 10 Feb 2014 13:01:08 -0600
From: Rolf Krogstad <rolf.krogstad@xxxxx.xxx>
To: "<AMSAT-BB@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: W1AW/0 on Satellites
Message-ID:
<CAJJyj=ayNwRX8HRn3ejArN0dXP8Mw3egYrKT0syabNPQmcwz8A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
My apologies.
I didn't mean to send this email to the entire reflector.
Rolf NR0T
On Mon, Jan 27, 2014 at 12:35 PM, Rolf Krogstad
<rolf.krogstad@xxxxx.xxx>wrote:
> I will be operating on the satellites as W1AW/0 from the state of
> Minnesota (Grid EN34) from 0000z on Jan. 29th through 2359z on Feb. 4th.
>
> Operating times will be evenings and on Sunday, as work permits. I will
> work SSB and CW on the analog birds and FM on SO-50.
>
> QSL per the instructions on the ARRL website (copied below):
> http://www.arrl.org/centennial-qso-party
>
> 73
> Rolf NR0T
> Grid EN34
>
> ===============================================
> http://www.arrl.org/centennial-qso-party
> QSLs
> <http://www.arrl.org/centennial-qso-party#Top>
>
> QSL cards from W1??AW and W1AW operating portable will be sent
> automatically via the QSL Bureau system to each U.S.A. station who signs-up
> online to receive such cards [this form is not ready yet -- please watch
> for an announcement]. This is a one-time only use of the QSL Bureau for
> this purpose. QSLs will automatically be sent to stations outside the
> U.S.A. via the QSL Bureau as normal. QSLs may be requested directly also,
> with an SASE required for return.
>
>
>
>
>
------------------------------
Message: 6
Date: Mon, 10 Feb 2014 13:02:40 -0600
From: Rolf Krogstad <rolf.krogstad@xxxxx.xxx>
To: "<AMSAT-BB@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: W1AW/0 on Satellites
Message-ID:
<CAJJyj=bXKSRqZHkHh903GFYMdiQdFn4T22R9qZKSt7ZgtKqdeg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I will soon get this right. This is the message I didn't mean to send to
the entire reflector!
On Mon, Feb 10, 2014 at 11:48 AM, Rolf Krogstad
<rolf.krogstad@xxxxx.xxx>wrote:
> Yes.
> Give me a call on my cell and we can find a time.
> 612-597-7249
>
> 73
> Rolf NR0T
>
>
>
------------------------------
Message: 7
Date: Mon, 10 Feb 2014 19:43:23 +0000 (GMT)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: Howie DeFelice <howied231@xxxxxxx.xxx>, AMSAT BB
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: 150 cubesats to provide global WIFI
multicasting
Message-ID:
<1392061403.57078.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
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 member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 9, Issue 50
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