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CX2SA > SATDIG 05.10.08 21:25l 835 Lines 24594 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Programming language recommendation? (Nigel Gunn G8IFF/W8IFF)
2. Re: SSB SP-7000 rejection (Anthony Monteiro)
3. Re: NOVA Software (Clint Bradford)
4. Re: Mode S advice (Art McBride)
5. Re: Programming language recommendation? (Gordon JC Pearce MM3YEQ)
6. Re: AO-51 (Patrick Domack)
7. Re: AO-51 (David - KG4ZLB/M?ZLB)
8. Re: AO-51 (Luc Leblanc)
9. Some more details of XW-1 (Michael Chen, BD5RV)
10. Re: Some more details of XW-1 (James Duffey)
11. Re: Some more details of XW-1 (n3tl(AT)bellsouth.net)
12. Oscar Antennas (Howard Kowall)
13. Re: Some more details of XW-1 (Rocky Jones)
14. Re: Some more details of XW-1 (Bill Ress)
----------------------------------------------------------------------
Message: 1
Date: Sun, 05 Oct 2008 02:14:43 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel(AT)ngunn.net>
Subject: [amsat-bb] Re: Programming language recommendation?
To: APBIDDLE(AT)mailaps.org
Cc: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID: <48E82313.3050202(AT)ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Try Forth.
There's a relatively modern Windows compiler here:
http://www.dataman.ro/?page_id=37
Alan P. Biddle wrote:
> We have a lot of folks here who do programming at a variety of levels.
> After a 20+ year hiatus, I am looking to get back into doing a bit of
> programming.
------------------------------
Message: 2
Date: Sat, 04 Oct 2008 22:32:53 -0400
From: Anthony Monteiro <aa2tx(AT)comcast.net>
Subject: [amsat-bb] Re: SSB SP-7000 rejection
To: "Tim Tapio" <tim(AT)timtapio.com>, <amsat-bb(AT)amsat.org>
Message-ID: <20081005023257.8A52WvF00E8cd(AT)mailbox5.ucsd.edu>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 05:37 AM 10/4/2008, Tim Tapio wrote:
>Hello all,
>
>I'm planning a new antenna system and planning on using an SSB preamp on the
>430 downlink side. The 7000 uses helical bandfiltering.
>My antenna separation will be on an 8' fiberglas boom. Will desense be an
>issues? Should I plan on using a bandpass filter such as a duplexer?
>
>Thanks and 73 de Tim, K4SHF
Hi Tim,
The SP-7000 has a pair of back-to-back diodes on the input to
protect the gasfet BEFORE the helical filter so it is pretty easy
to overload it. I would guess that 8' is not enough seperation and
you will need the duplexor so you should probably plan for it.
73,
Tony AA2TX
------------------------------
Message: 3
Date: 04 Oct 2008 20:04:00 -0700
From: "Clint Bradford" <clintbrad4d(AT)earthlink.net>
Subject: [amsat-bb] Re: NOVA Software
To: <amsat-bb-request(AT)amsat.org>
Cc: <amsat-bb(AT)amsat.org>
Message-ID: <3305995460.8169468(AT)smtpauth.earthlink.net>
Please try a uninstall and re-install!
Clint Bradford, K6LCS
909-241-7666
------------------------------
Message: 4
Date: Sat, 4 Oct 2008 22:04:35 -0700
From: "Art McBride" <kc6uqh(AT)cox.net>
Subject: [amsat-bb] Re: Mode S advice
To: "'Michael Heim'" <kd0ar(AT)sbcglobal.net>, <AMSAT-BB(AT)amsat.org>
Message-ID: <D688B24E7E6E404AB5263D57657C2158(AT)kc6uqh>
Content-Type: text/plain; charset="us-ascii"
Michael,
I would recommend a small 18" Dish with a patch or 3 turn helix feed.
Helixes at 2.4 are somewhat tricky and long helixes are effected by the
plastic used to hold the turns. Self supporting helixes are difficult to
make beyond 3-4 turns. Feed should be opposite rotation however I recall
AO-51 is linear polarization on 2.4 GHz.
Art
-----Original Message-----
From: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-bounces(AT)amsat.org] On
Behalf Of Michael Heim
Sent: Saturday, October 04, 2008 4:08 PM
To: AMSAT-BB(AT)amsat.org
Subject: [amsat-bb] Mode S advice
Last month I was experimenting with mode S receive antennas, and I think I
posted some questions on here as to what you guys who are on mode S use.
Although I have operated microwave, I have never done so via the satellites.
I have 2 options and both appear to work about equally. one involves a
linear yagi, the other a helix, RHCP. The last time the bird was in mode S
analog, it used mode L for the uplink. I noticed, while listening in using
either antenna, a noticeable amount of deep fades on the bird. I'm not sure
if it was caused by reflections nearby, or uplink fades on 1269 mhz. Both
of these antennas were mounted on a camera tripod about 4 feet off the
ground, and there was some metal within about 25 feet or so, which is
unavoidable. The antennas will be placed about 15 feet above the ground,
and the metal in the vicinity will be below the antenna.
So, your advice... should I go with a 16 dbi linear yagi, commercially made
for the MMTS band, or the RHCP homebrew 12 turn helix? I am having trouble
getting much longer than 12 turns, winding the helix evenly. Is there
really an advantage in using either? I guess I'm looking for whatever will
do the best as far as fading goes. I am impressed, as the signals were
quite strong while using only 2 foot long antennas.
By the way, I am building a 1269 TX converter from scratch. I happened upon
a brick oscillator that I recrystalled for the proper LO for a 144 IF. The
mode S IF is 123 mhz, so there should be no IF leakage problems.
Michael Heim
Chief Engineer, Forever Broadcasting
New Castle PA
WKST WJST WWGY
814-671-0666
Chapter Chair, SBE-122
ARS KD0AR
_______________________________________________
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Not an AMSAT-NA member? Join now to support the amateur satellite program!
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------------------------------
Message: 5
Date: Sun, 05 Oct 2008 11:18:18 +0100
From: Gordon JC Pearce MM3YEQ <gordonjcp(AT)gjcp.net>
Subject: [amsat-bb] Re: Programming language recommendation?
To: JW <ns1z(AT)arrl.net>
Cc: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID: <48E8946A.7080809(AT)gjcp.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
JW wrote:
> Along the same line: anyone on here doing PIC programming or know of a
> list for beginners? From CW keyers to Antenna control units and
> everything in between it looks like it would be fun to program some
> gadgets for around the shack...
Without lighting up a PIC/AVR flamewar, I've pretty much entirely moved
from PIC to AVR. The hardware is generally two to four times faster for
the same clock rate (gets more done per cycle) and is easier to program
- you can make up an AVR programmer for the parallel port that's
basically three resistors!
Furthermore, the toolchain is much better for AVR - Microchip are only
interested in pushing their frankly dreadful Windows-only MPLAB
software, while Atmel actively contribute to avr-gcc, a cross-platform
toolchain based on the industry standard gcc. The whole AVR community
seems a lot better than the PIC one, and I say that as a long-standing
user of PIC microcontrollers.
In short, PIC is great, but the community isn't as strong and the tools
are rubbish. On the other hand, Microchip are always more than happy to
sample parts and their customer support is *excellent*.
AVR is technically superior in pretty much every way, with an excellent
community. Unfortunately Atmel's tech support are a dour bunch who are
often hard to get good information out of, and not great at sending samples.
I haven't tried the ARM-based AVRs or the MIPS-based PICs yet, though.
Those might be something to tempt me back to Microchip, if MIPS is as
good as I remember it ;-)
Gordon
------------------------------
Message: 6
Date: Sun, 05 Oct 2008 06:56:13 -0400
From: Patrick Domack <patrickdk(AT)patrickdk.com>
Subject: [amsat-bb] Re: AO-51
To: amsat-bb(AT)amsat.org
Message-ID: <20081005065613.ygzj8wsa8o4w0g44(AT)tenchi.patrickdk.com>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
I dunno about voice, but the u mode packet was working good.
Quoting David - KG4ZLB/M?ZLB <m0zlb(AT)btinternet.com>:
> Evening all!
>
> Is AO-51 on at present? I just had an 89 degree pass (in EL96) and heard
> nothing! It should be in v/u (A)
>
> Discounting fat finger syndrome with the radio, I wondered if there was
> something up with the bird at this time or is is operator error?
>
> Thank in advance
>
> David KG4ZLB
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: 7
Date: Sun, 05 Oct 2008 09:55:47 -0400
From: David - KG4ZLB/M?ZLB <m0zlb(AT)btinternet.com>
Subject: [amsat-bb] Re: AO-51
To: amsat-bb(AT)amsat.org
Message-ID: <48E8C763.2020405(AT)btinternet.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks to all who replied both here and off-list, the embarrassing
results of the station investigation reveal a major operator error! :-[
David
KG4ZLB
Patrick Domack wrote:
> I dunno about voice, but the u mode packet was working good.
>
> Quoting David - KG4ZLB/M?ZLB <m0zlb(AT)btinternet.com>:
>
>
>> Evening all!
>>
>> Is AO-51 on at present? I just had an 89 degree pass (in EL96) and heard
>> nothing! It should be in v/u (A)
>>
>> Discounting fat finger syndrome with the radio, I wondered if there was
>> something up with the bird at this time or is is operator error?
>>
>> Thank in advance
>>
>> David KG4ZLB
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB(AT)amsat.org. 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(AT)amsat.org. 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
>
>
--
*David*
*KG4ZLB/M?ZLB*
*www.kg4zlb.com <http://www.kg4zlb.com/>*
*www.m?zlb.com <http://www.m0zlb.com/>*
------------------------------
Message: 8
Date: Sun, 05 Oct 2008 11:17:42 -0400
From: Luc Leblanc <lucleblanc6(AT)videotron.ca>
Subject: [amsat-bb] Re: AO-51
To: amsat-bb(AT)AMSAT.Org
Message-ID: <48E8A256.28301.247957(AT)lucleblanc6.videotron.ca>
Content-Type: text/plain; charset=ISO-8859-1
On 5 Oct 2008 at 9:55, David - KG4ZLB/M?ZLB wrote:
> Thanks to all who replied both here and off-list, the embarrassing
> results of the station investigation reveal a major operator error! :-[
>
>
>
> David
> KG4ZLB
>
The worse one can be your coax not plug in :) but we never know could be you
have a better one?
That one of you who is faultless may throw the first stone say the tall guy
with a beard!
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 9
Date: Sun, 5 Oct 2008 23:56:14 +0800
From: "Michael Chen, BD5RV" <bd5rv(AT)jsdxc.net>
Subject: [amsat-bb] Some more details of XW-1
To: <amsat-bb(AT)amsat.org>
Cc: stanw1le(AT)verizon.net
Message-ID: <9A6F4A0D6B544279B9881D4951C0A61B(AT)michaeldesktop>
Content-Type: text/plain; charset="gb2312"
Hi, guys,
Here are some details about upcoming Chinese XW-1:
Orbit: Sun Synchronous Orbit
Altitude: 499km
Inclination: 98 degrees
Period: 94 minutes
Weight: 35kg
Size: 550mm * 350mm
Temperature: -20 to +45C
Power: Li ion battery: 16Ah
Long-term maximum power: 8W
Short-term maximum power: 18W
Payload:
Amateur radio payload: 5.2kg
Youngster's experiment payload: 1.6kg
CMOS camera: 0.2kg
About amateur radio payload:
Beacon: 435Mhz, CW 20dBm
Linear transponder: RX: 145Mhz, TX: 435Mhz, 40KHz, 30dBm
FM Transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
Digital store and forward transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
145Mhz RX Antenna: 2dBi, 135 degree, LHCP, unpacked by remote control after
entering the orbit.
435Mhz TX antenna: 2dBi, 135 degree, RHCP, unpacked by remote control after
entering the orbit.
Michael, BD5RV/4
------------------------------
Message: 10
Date: Sun, 5 Oct 2008 10:23:37 -0600
From: James Duffey <JamesDuffey(AT)comcast.net>
Subject: [amsat-bb] Re: Some more details of XW-1
To: "Michael Chen, BD5RV" <bd5rv(AT)jsdxc.net>
Cc: stanw1le(AT)verizon.net, amsat-bb(AT)amsat.org
Message-ID: <23C6B732-E904-4211-9B18-74ACBE5C0EF8(AT)comcast.net>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
This sounds like a nearly ideal LEO satellite.
An FM cross band repeater to get newcomers to use the satellite
without new investments.
A linear transponder for more serious work that the FM ops can move up
to. It seems to me that when the FM ops see what others are doing with
the linear transponder on the same satellite it will be a good
incentive to move up. More QSOs, better DX, less QRM.
And a digital transponder for those so inclined.
Kind of one stop shopping.
It could be a bit higher, but one can't hope for everything. - Duffey
On Oct 5, 2008, at 9:56 AM, Michael Chen, BD5RV wrote:
> Hi, guys,
>
> Here are some details about upcoming Chinese XW-1:
>
> Orbit: Sun Synchronous Orbit
> Altitude: 499km
> Inclination: 98 degrees
> Period: 94 minutes
>
> Weight: 35kg
> Size: 550mm * 350mm
> Temperature: -20 to +45C
> Power: Li ion battery: 16Ah
> Long-term maximum power: 8W
> Short-term maximum power: 18W
>
> Payload:
> Amateur radio payload: 5.2kg
> Youngster's experiment payload: 1.6kg
> CMOS camera: 0.2kg
>
> About amateur radio payload:
> Beacon: 435Mhz, CW 20dBm
> Linear transponder: RX: 145Mhz, TX: 435Mhz, 40KHz, 30dBm
> FM Transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
> Digital store and forward transponder: RX: 145Mhz, TX: 435Mhz,
> 16KHz, 30dBm
>
> 145Mhz RX Antenna: 2dBi, 135 degree, LHCP, unpacked by remote
> control after entering the orbit.
> 435Mhz TX antenna: 2dBi, 135 degree, RHCP, unpacked by remote
> control after entering the orbit.
>
>
>
> Michael, BD5RV/4
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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
--
KK6MC
James Duffey
Cedar Crest NM
------------------------------
Message: 11
Date: Sun, 05 Oct 2008 16:30:38 +0000
From: n3tl(AT)bellsouth.net
Subject: [amsat-bb] Re: Some more details of XW-1
To: James Duffey <JamesDuffey(AT)comcast.net>, "Michael Chen, BD5RV"
<bd5rv(AT)jsdxc.net>
Cc: amsat-bb(AT)amsat.org, stanw1le(AT)verizon.net
Message-ID:
<100520081630.29038.48E8EBAD000DB5CE0000716E22230706129B0A02D2089B9A019C
04040A0DBF049BCC02(AT)att.net>
Content-Type: text/plain
It really does sound pretty cool. I'm already looking forward to chasing it
across the sky with my handheld!
73 to all,
Tim
-------------- Original message from James Duffey
<JamesDuffey(AT)comcast.net>: --------------
> This sounds like a nearly ideal LEO satellite.
>
> An FM cross band repeater to get newcomers to use the satellite
> without new investments.
>
> A linear transponder for more serious work that the FM ops can move up
> to. It seems to me that when the FM ops see what others are doing with
> the linear transponder on the same satellite it will be a good
> incentive to move up. More QSOs, better DX, less QRM.
>
> And a digital transponder for those so inclined.
>
> Kind of one stop shopping.
>
> It could be a bit higher, but one can't hope for everything. - Duffey
>
>
>
>
> On Oct 5, 2008, at 9:56 AM, Michael Chen, BD5RV wrote:
>
> > Hi, guys,
> >
> > Here are some details about upcoming Chinese XW-1:
> >
> > Orbit: Sun Synchronous Orbit
> > Altitude: 499km
> > Inclination: 98 degrees
> > Period: 94 minutes
> >
> > Weight: 35kg
> > Size: 550mm * 350mm
> > Temperature: -20 to +45C
> > Power: Li ion battery: 16Ah
> > Long-term maximum power: 8W
> > Short-term maximum power: 18W
> >
> > Payload:
> > Amateur radio payload: 5.2kg
> > Youngster's experiment payload: 1.6kg
> > CMOS camera: 0.2kg
> >
> > About amateur radio payload:
> > Beacon: 435Mhz, CW 20dBm
> > Linear transponder: RX: 145Mhz, TX: 435Mhz, 40KHz, 30dBm
> > FM Transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
> > Digital store and forward transponder: RX: 145Mhz, TX: 435Mhz,
> > 16KHz, 30dBm
> >
> > 145Mhz RX Antenna: 2dBi, 135 degree, LHCP, unpacked by remote
> > control after entering the orbit.
> > 435Mhz TX antenna: 2dBi, 135 degree, RHCP, unpacked by remote
> > control after entering the orbit.
> >
> >
> >
> > Michael, BD5RV/4
> > _______________________________________________
> > Sent via AMSAT-BB(AT)amsat.org. 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
>
> --
> KK6MC
> James Duffey
> Cedar Crest NM
>
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: 12
Date: Sun, 5 Oct 2008 11:31:03 -0500
From: "Howard Kowall" <hkowall(AT)shaw.ca>
Subject: [amsat-bb] Oscar Antennas
To: "amsat" <amsat-bb(AT)amsat.org>
Message-ID: <3CAEA1E67D20454392C569D60D41EBB8(AT)howardoffice>
Content-Type: text/plain; charset="iso-8859-1"
Hello to All
I am looking for a single dual Oscar antenna similar to the Gulf Alpha Model
No.2M 70CM Sat.
But now I see that Gulf Alpha has stopped producing this antenna.
I need an antenna with a fairly small foot print,I see that M2 makes something
similar.
Who are the other manufactures that make a similar antenna,preferably in North
America due to shipping
Thanks Vey Much to All who Respond
Howard
VE4ISP
------------------------------
Message: 13
Date: Sun, 5 Oct 2008 11:44:41 -0500
From: Rocky Jones <orbitjet(AT)hotmail.com>
Subject: [amsat-bb] Re: Some more details of XW-1
To: <n3tl(AT)bellsouth.net>, James Duffey <jamesduffey(AT)comcast.net>,
"Michael Chen, BD5RV" <bd5rv(AT)jsdxc.net>
Cc: stanw1le(AT)verizon.net, amsat-bb(AT)amsat.org
Message-ID: <COL106-W12BB07DBC9B57D48BF56ACD63E0(AT)phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
wonder how many of these we could have had (with maybe an AO-10 or two thrown
in) for the dollars spent on AO-40?
Robert WB5MZO life member
> From: n3tl(AT)bellsouth.net
> To: JamesDuffey(AT)comcast.net; bd5rv(AT)jsdxc.net
> Date: Sun, 5 Oct 2008 16:30:38 +0000
> CC: amsat-bb(AT)amsat.org; stanw1le(AT)verizon.net
> Subject: [amsat-bb] Re: Some more details of XW-1
>
> It really does sound pretty cool. I'm already looking forward to chasing it
across the sky with my handheld!
>
> 73 to all,
>
> Tim
> -------------- Original message from James Duffey
<JamesDuffey(AT)comcast.net>: --------------
>
>
> > This sounds like a nearly ideal LEO satellite.
> >
> > An FM cross band repeater to get newcomers to use the satellite
> > without new investments.
> >
> > A linear transponder for more serious work that the FM ops can move up
> > to. It seems to me that when the FM ops see what others are doing with
> > the linear transponder on the same satellite it will be a good
> > incentive to move up. More QSOs, better DX, less QRM.
> >
> > And a digital transponder for those so inclined.
> >
> > Kind of one stop shopping.
> >
> > It could be a bit higher, but one can't hope for everything. - Duffey
> >
> >
> >
> >
> > On Oct 5, 2008, at 9:56 AM, Michael Chen, BD5RV wrote:
> >
> > > Hi, guys,
> > >
> > > Here are some details about upcoming Chinese XW-1:
> > >
> > > Orbit: Sun Synchronous Orbit
> > > Altitude: 499km
> > > Inclination: 98 degrees
> > > Period: 94 minutes
> > >
> > > Weight: 35kg
> > > Size: 550mm * 350mm
> > > Temperature: -20 to +45C
> > > Power: Li ion battery: 16Ah
> > > Long-term maximum power: 8W
> > > Short-term maximum power: 18W
> > >
> > > Payload:
> > > Amateur radio payload: 5.2kg
> > > Youngster's experiment payload: 1.6kg
> > > CMOS camera: 0.2kg
> > >
> > > About amateur radio payload:
> > > Beacon: 435Mhz, CW 20dBm
> > > Linear transponder: RX: 145Mhz, TX: 435Mhz, 40KHz, 30dBm
> > > FM Transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
> > > Digital store and forward transponder: RX: 145Mhz, TX: 435Mhz,
> > > 16KHz, 30dBm
> > >
> > > 145Mhz RX Antenna: 2dBi, 135 degree, LHCP, unpacked by remote
> > > control after entering the orbit.
> > > 435Mhz TX antenna: 2dBi, 135 degree, RHCP, unpacked by remote
> > > control after entering the orbit.
> > >
> > >
> > >
> > > Michael, BD5RV/4
> > > _______________________________________________
> > > Sent via AMSAT-BB(AT)amsat.org. 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
> >
> > --
> > KK6MC
> > James Duffey
> > Cedar Crest NM
> >
> >
> >
> >
> >
> > _______________________________________________
> > Sent via AMSAT-BB(AT)amsat.org. 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(AT)amsat.org. 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
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Message: 14
Date: Sun, 05 Oct 2008 11:54:06 -0700
From: Bill Ress <bill(AT)hsmicrowave.com>
Subject: [amsat-bb] Re: Some more details of XW-1
To: "Michael Chen, BD5RV" <bd5rv(AT)jsdxc.net>
Cc: stanw1le(AT)verizon.net, amsat-bb(AT)amsat.org
Message-ID: <48E90D4E.2060004(AT)hsmicrowave.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Michael,
Thanks for update on XW-1.
A quick check of the IARU satellite frequency coordination web site
doesn't shown XW-1 as being in the coordination process. Do you know if
it's the plan is to have the frequencies coordinated with the IARU?
Regards...Bill - N6GHz
Michael Chen, BD5RV wrote:
> Hi, guys,
>
> Here are some details about upcoming Chinese XW-1:
>
> Orbit: Sun Synchronous Orbit
> Altitude: 499km
> Inclination: 98 degrees
> Period: 94 minutes
>
> Weight: 35kg
> Size: 550mm * 350mm
> Temperature: -20 to +45C
> Power: Li ion battery: 16Ah
> Long-term maximum power: 8W
> Short-term maximum power: 18W
>
> Payload:
> Amateur radio payload: 5.2kg
> Youngster's experiment payload: 1.6kg
> CMOS camera: 0.2kg
>
> About amateur radio payload:
> Beacon: 435Mhz, CW 20dBm
> Linear transponder: RX: 145Mhz, TX: 435Mhz, 40KHz, 30dBm
> FM Transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
> Digital store and forward transponder: RX: 145Mhz, TX: 435Mhz, 16KHz, 30dBm
>
> 145Mhz RX Antenna: 2dBi, 135 degree, LHCP, unpacked by remote control after
entering the orbit.
> 435Mhz TX antenna: 2dBi, 135 degree, RHCP, unpacked by remote control after
entering the orbit.
>
>
>
> Michael, BD5RV/4
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are those of the author.
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>
>
>
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End of AMSAT-BB Digest, Vol 3, Issue 504
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