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CX2SA > SATDIG 14.08.11 15:45l 1238 Lines 40433 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: ARISSat-1 battery eclipse voltage decreasing (Phil Karn)
2. arissat-1 (jerry keeton)
3. Re: Batteries and High Power still working (Alan Cresswell)
4. ARISSat-1 Telemetry (Greg D.)
5. Re: ARISSat-1 battery eclipse voltage decreasing (Art McBride)
6. MMT 432/144 Manuals (Ben Gelb)
7. Re: [YCCC] Netbooks (John Allen)
8. Re: [YCCC] Netbooks (Alex Malyava)
9. Re: [YCCC] Netbooks (Gerry Hull)
10. Re: MMT 432/144 Manuals (Ben Gelb)
11. Re: ARISSat-1 battery eclipse voltage decreasing (Luc Leblanc)
12. SO-50 06:01-06:14 Not a soul... (Lee Maisel)
13. Video with historic photos of the DOVE satellite (Roland Zurmely)
14. Re: MMT 432/144 Manuals (i8cvs)
15. Re: [YCCC] Netbooks (Nigel A. Gunn, W8IFF/G8IFF)
16. Re: [YCCC] Netbooks (Nigel A. Gunn, W8IFF/G8IFF)
17. FW: [ans] ANS-226 AMSAT Weekly Bulletins (Dee)
----------------------------------------------------------------------
Message: 1
Date: Sat, 13 Aug 2011 19:56:15 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
To: Dave Guimont <dguimon1@xxx.xx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: ARISSat-1 battery eclipse voltage decreasing
Message-ID: <4E47394F.4060002@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/13/11 6:11 PM, Dave Guimont wrote:
> How about you designing circuitry/program to charge "cells" individually
> rather than the "battery". Or has that been tried??
That's a great idea; I wish I thought of it first, but it was Lou
McFadden W5DID who published a paper at the AMSAT Symposium a few years
ago on a new modular power system.
His idea was to turn each cell into an intelligent energy storage module
and to connect those modules in parallel to a power bus. There'd be a
DC-DC converter between the cell and the bus so they could operate at
different voltages. If the cell in one module failed, it would
disconnect itself from the bus instead of dragging it down.
He found it a challenge to achieve high efficiency in the DC-DC
converter with low voltage batteries. For the lower voltage chemistries
(e.g., NiMH at 1.2 V) it might be necessary to compromise by using two
or maybe three cells in series per module. A lithium ion module would
need only one cell since they operate at a much higher voltage of 3.6V.
The beauty of his scheme is that not only would this be far more robust
against individual cell failures than a single series string, you could
fly several kinds of batteries to see which functions best.
With the proper command to a module controller you could perform a
controlled discharge of its cell for a capacity test. That's kinda neat.
Some modules could use supercaps. They have very high cycle lives
(~500,000) but low energy density (0.35 watt-hour for a D-cell sized
cap). You'd always discharge them first, or perhaps keep one in reserve
to keep a computer going. Since they're capacitors you'd need the DC-DC
regulator to produce a constant voltage as they discharge.
Thinking more about his scheme, you could program each module with a
command like "Keep the power bus at +12V by pumping up to 2A into it
until you're 50% depleted" or "charge at 1A max unless the bus voltage
falls to 11.5V". The computer could issue a new command at any time,
such as one to stop all charging when the satellite enters eclipse.
One module might contain just a load resistor to act as a shunt
regulator to keep the bus voltage from going too high.
And one or two modules might contain high-density (e.g., lithium)
primary batteries as emergency fallbacks to keep things going long
enough for the command stations to figure out what's going on.
-Phil
------------------------------
Message: 2
Date: Sat, 13 Aug 2011 22:04:05 -0500
From: "jerry keeton" <jkboxk@xxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] arissat-1
Message-ID: <00B9C672314545138287C9F6AE3AE947@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Voice @ 0240Z from em31hd ( in eclipse)
meta 69 min.
IHU 47 deg. c
control panel temp 60 deg. c
batt volt. 36.09
batt. current -8 ma
Jerry WB5LHD
------------------------------
Message: 3
Date: Sun, 14 Aug 2011 04:12:59 -0000
From: "Alan Cresswell" <alancresswell@xxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Batteries and High Power still working
Message-ID: <35A63A4D6CD64217A8B12D2FF43BE835@xxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
ARISsat-1 in high power mode over ZL for the entire passes 14 Aug. 0201UT
and 0337UT. Good solid signals on both telemetry (59 and 68 frames
uploaded) and audio channels and also heard myself OK on the transponder on
the 0337UT pass.
73
Alan
ZL2BX
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Luc Leblanc
Sent: Saturday, 13 August 2011 04:55
To: amsat-bb@xxxxx.xxx
Cc: eu-amsat@xxxxxxxxxxx.xxx
Subject: [amsat-bb] Batteries and High Power still working
>From www.arissat1.org
>11 Aug 2001
>The Russian Silver-Zinc (Ag-Zn) battery that is powering
ARISSat-1/RadioSkaf-B is the same battery that is used to power the Russian
Orlan
>space suits. The battery is designed for a lifetime of 5 deep
charge-discharge cycles when used in the spacesuit.
>Using it in a spacecraft going through 14 shallow charge-discharge cycles
per day is new territory.
12 days since activation time 14 shallow charge-discharge cycles per day
=168 shallow charge-discharge cycles "Is shallow = normal charge-
discharge?"
Some specs:
Silver-zinc batteries are available off-the-shelf and have a higher specific
energy (130 Wh/kg) and density (240 Wh/litre) than most other
commonly available secondary batteries. High cost, limited cycle and shelf
life, and a long recharging process reduce its overall
attraction. While at normal discharge rates, 40 to 50 cycles can be expected
from the battery, this reduces to 10 or 15 at high discharge
rates. Cycle life is also reduced if the battery is discharged below 80% of
rated capacity and thus, a 20% reserve is required at the end
of the mission. Silver-zinc batteries have been used extensively in AUVs and
their performance is reliable and documented. Their high cost
and short life have, however, prompted consideration of alternative
technologies.
P.S. At 13 Aug 2011 04:44:03 UTC ARRISat-1 High Power mode has been
reported over Australia
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
_______________________________________________
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
-----
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------------------------------
Message: 4
Date: Sat, 13 Aug 2011 21:21:36 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 Telemetry
Message-ID: <BLU133-W221FFDFA47894CD58B2516A9270@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi all,
Got a partial verbal telemetry this 04:08z pass (and a perfect preloaded
SSTV).
I think it said that the internal temperature was 45c. Isn't that a bit
toasty?
The next parameter I thought I heard 65, whatever it represents.
Battery voltage was 36.09v, current -4ma.
The satellite was in low power mode (40 seconds on, 2 min off), though I
believe it was still in sunlight until right at the end of the pass.
Sorry for the partial, but someone was on the phone and kept talking while I
was trying to listen...
Greg KO6TH
------------------------------
Message: 5
Date: Sat, 13 Aug 2011 22:05:39 -0700
From: "Art McBride" <kc6uqh@xxx.xxx>
To: "'Dave Guimont'" <dguimon1@xxx.xx.xxx>, "'Phil Karn'"
<karn@xxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: ARISSat-1 battery eclipse voltage decreasing
Message-ID: <5CDBE0DA669C427BB8A811CFD6AEE197@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Dave,
A simple switching inverter connected to the solar cells with multiple
windings would prevent over charging as the voltage output would be
regulated to the voltage of a single cell and the windings providing
isolation between cells. This would insure an equal charge to each cell
preventing early battery failure. Using FET switches for rectification can
boost efficiencies to over 90% even using input voltages as low as 2 Volts
D.C.
Art,
KC6UQH
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Dave Guimont
Sent: Saturday, August 13, 2011 6:11 PM
To: Phil Karn
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: ARISSat-1 battery eclipse voltage decreasing
>
>Disclaimer: what follows is entirely my own personal opinion, not
>necessarily that of the ARISSat-1 team or anyone else. I might be
>missing information that would affect my analysis.
>
>Ken's plot is extremely valuable. It strongly suggests battery failure,
>not a negative power budget as Tony, AA2TX suggests. Note the sharp and
>consistent *increase* in daylight battery voltage that occurred late on
>Aug 11, roughly coincident with sharp *decreases* of voltage during
>eclipse and reports of computer resets and extended low power operation.
>This is inconsistent with a negative orbit-average power budget. If that
>were the case, the battery would never reach full charge and the voltage
>would never rise so high.
Phil,
How about you designing circuitry/program to charge "cells"
individually rather than the "battery". Or has that been tried??
73 Dave
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
_______________________________________________
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
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------------------------------
Message: 6
Date: Sat, 13 Aug 2011 13:17:53 -0700
From: Ben Gelb <ben@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] MMT 432/144 Manuals
Message-ID:
<CAHbc55OOTRnnwa-R_N8M6Ke6Oe8583=3XbKQqN89LVzyeBMJgQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello all -
I recently picked up an MMT 432/144 module for cheap. It seems to work
OK on receive, but seems to have very low output on transmit.
Does anyone have any manual or schematic type information for this
unit? I think I have some debugging ahead and schematics, especially,
might come in handy.
Thanks,
Ben
------------------------------
Message: 7
Date: Sat, 13 Aug 2011 16:20:37 -0400
From: "John Allen" <john@xxxxxxxxxxxxxxxxxx.xxx>
To: <tjjapha@xxxxxxxxx.xxx>, "'amsat-bb'" <amsat-bb@xxxxx.xxx>,
"'obo'" <obo@xxxxx.xxx>, "'yccc'" <yccc@xxxx.xxx>
Subject: [amsat-bb] Re: [YCCC] Netbooks
Message-ID: <002201cc59f6$775be600$6613b200$@xxx>
Content-Type: text/plain; charset="US-ASCII"
By the way, try to get Win 7 Home Premium and avoid the "crippled" Win 7
starter
edition if you can.
John K1AE
John Allen - PC Support Solutions www.pcsupportsolutions.com
PC On Site Service and Training - Computer HW/SW/Network debugging,
installation
and upgrades.
-----Original Message-----
From: yccc-bounces@xxxxxxxxxx.xxx [mailto:yccc-bounces@xxxxxxxxxx.xxxx On
Behalf
Of ANTHONY JAPHA
Sent: Saturday, August 13, 2011 9:06 AM
To: amsat-bb; obo; yccc
Subject: [YCCC] Netbooks
All,
Mni tnx for the responses about netbooks. Generally, a lot of satisfaction
with
them, with concerns abt. speed and keyboard size. In my application, neither
should be a problem. ASUS was highly recommended.
73,
Tony, N2UN
_______________________________________________
YCCC Reflector mailto:yccc@xxxxxxxxxx.xxx
Yankee Clipper Contest Club http://www.yccc.org
Reflector Info: http://lists.contesting.com/mailman/listinfo/yccc
------------------------------
Message: 8
Date: Sat, 13 Aug 2011 17:09:55 -0400
From: Alex Malyava <alex.k2bb@xxxxx.xxx>
To: tjjapha@xxxxxxxxx.xxx
Cc: yccc <yccc@xxxx.xxx>, amsat-bb <amsat-bb@xxxxx.xxx>, obo
<obo@xxxxx.xxx>
Subject: [amsat-bb] Re: [YCCC] Netbooks
Message-ID:
<CAMHr7dLBz1ot3hoda-n_F6BNpx=qvN4mskDskmrRx88N+iSNzQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
What's the benefit of net-books?
Size, weight, battery life?
they are cheaper, but not that much - cheapest 15" notebooks are $280...320.
CPU and memory are also not as good as in notebooks.
Where you gonna use it?
If someone tested net-book+radio configuration and it runs no problem 100% -
I can be convinced that there is no reason to pay more for notebook and
carry more weight to some DX country.
AM
On Sat, Aug 13, 2011 at 9:05 AM, ANTHONY JAPHA <tjjapha@xxxxxxxxx.xxx>wrote:
> All,
> Mni tnx for the responses about netbooks. Generally, a lot of satisfaction
> with them, with concerns abt. speed and keyboard size. In my application,
> neither should be a problem. ASUS was highly recommended.
> 73,
> Tony, N2UN
> _______________________________________________
> YCCC Reflector mailto:yccc@xxxxxxxxxx.xxx
> Yankee Clipper Contest Club http://www.yccc.org
> Reflector Info: http://lists.contesting.com/mailman/listinfo/yccc
>
>
------------------------------
Message: 9
Date: Sat, 13 Aug 2011 20:12:08 -0300
From: Gerry Hull <gerry@xxxx.xxx>
To: tjjapha@xxxxxxxxx.xxx
Cc: yccc <yccc@xxxx.xxx>, amsat-bb <amsat-bb@xxxxx.xxx>, obo
<obo@xxxxx.xxx>
Subject: [amsat-bb] Re: [YCCC] Netbooks
Message-ID:
<CABPfG-6EHyvrhqgPsQ4Dju_X1iQphnxa-+qjxEQxF1u8Nc8fjw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Tony,
I have had a few netbooks and never liked em that much.
For work and portable ham operations, I use Lenovo X61 Thinkpad laptops.
Dual-Core CPU, 3 Gigs RAM, and typically a 100GB hard disk. 3 USB ports; I
used serial-to-RS232 if required. These are available off-lease on ebay
for about $250, and smoke just about any netbook. They have a full size
keyboard, and weigh 3 pounds. For another $99, you can add a 500GB hybrid
solid-state/disk drive, which allows me to boot Windows 7 in less than 10
seconds.
I'm using one now, and was when having the CW QSO with you yesterday...
73,
Gerry, VY2CDX (back to W1VE tomorrow :-( )
On Sat, Aug 13, 2011 at 10:05 AM, ANTHONY JAPHA <tjjapha@xxxxxxxxx.xxx>wrote:
> All,
> Mni tnx for the responses about netbooks. Generally, a lot of satisfaction
> with them, with concerns abt. speed and keyboard size. In my application,
> neither should be a problem. ASUS was highly recommended.
> 73,
> Tony, N2UN
> _______________________________________________
> YCCC Reflector mailto:yccc@xxxxxxxxxx.xxx
> Yankee Clipper Contest Club http://www.yccc.org
> Reflector Info: http://lists.contesting.com/mailman/listinfo/yccc
>
>
------------------------------
Message: 10
Date: Sat, 13 Aug 2011 18:37:38 -0700
From: Ben Gelb <ben@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: MMT 432/144 Manuals
Message-ID:
<CAHbc55MfrrMQ+SwVCrTmvdua34QSJHER2ngSVOkq0NyQkkGVqg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I found http://g4fre.com/circuits.htm, which had some good info.
I think the last pre-driver stage is busted, which is a 2N6256... does
anybody know a good replacement that is in production nowadays?
Thanks,
Ben
On Sat, Aug 13, 2011 at 1:17 PM, Ben Gelb <ben@xxxxxxx.xxx> wrote:
> Hello all -
>
> I recently picked up an MMT 432/144 module for cheap. It seems to work
> OK on receive, but seems to have very low output on transmit.
>
> Does anyone have any manual or schematic type information for this
> unit? I think I have some debugging ahead and schematics, especially,
> might come in handy.
>
> Thanks,
> Ben
>
------------------------------
Message: 11
Date: Sun, 14 Aug 2011 01:12:59 -0400
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Cc: eu-amsat@xxxxxxxxxxx.xxx
Subject: [amsat-bb] Re: ARISSat-1 battery eclipse voltage decreasing
Message-ID: <4E47595B.11303.D7BB19B@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=US-ASCII
ARRISat-1 was mainly in eclipse over North America since the launch but
starting August 15 the first orbits over NA will be out of eclipse
and if the batteries can hold and the inside temp does not cooked the
electronics we will have a chance to listen and work it at a more
suitable time slot instead having to set the alarm clock in the middle of
the night...Plus we will have the high power.
We all hope for the best but as projected we already exceed the +- 8 days
life expectancy lets say we lived on borrowed time.
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 12
Date: Sun, 14 Aug 2011 00:15:28 -0600
From: Lee Maisel <maisel@xxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] SO-50 06:01-06:14 Not a soul...
Message-ID: <4E476800.1060506@xxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
serves me right for trying at midnight my time... :( not a soul on the
satellite, EXCELLENT overhead pass.... Long...
Sigh...
Lee
W5LMM
------------------------------
Message: 13
Date: Sun, 14 Aug 2011 05:28:53 -0700 (PDT)
From: Roland Zurmely <py4zbz@xxxxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Video with historic photos of the DOVE satellite
Message-ID:
<1313324933.95440.YahooMailNeo@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
http://www.youtube.com/watch?v=XqTVsJtNHCs
73 de Roland PY4ZBZ
------------------------------
Message: 14
Date: Sun, 14 Aug 2011 14:59:55 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Ben Gelb" <ben@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: MMT 432/144 Manuals
Message-ID: <001601cc5a82$10ba60c0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Ben,
I have the original schematic diagram of the MMT 432/144 MHz
transverter and if you need it I can send a copy to you as email
attachement.
73" de
i8CVS Domenico
----- Original Message -----
From: "Ben Gelb" <ben@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, August 13, 2011 10:17 PM
Subject: [amsat-bb] MMT 432/144 Manuals
> Hello all -
>
> I recently picked up an MMT 432/144 module for cheap. It seems to work
> OK on receive, but seems to have very low output on transmit.
>
> Does anyone have any manual or schematic type information for this
> unit? I think I have some debugging ahead and schematics, especially,
> might come in handy.
>
> Thanks,
> Ben
> _______________________________________________
> 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: 15
Date: Sun, 14 Aug 2011 13:21:48 +0000
From: "Nigel A. Gunn, W8IFF/G8IFF" <nigel@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: [YCCC] Netbooks
Message-ID: <4E47CBEC.3030106@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Battery life is no better because the battery is (generally) smaller
although larger batteries are available at a cost.
Other than that, there are no real technical issues, it's a laptop with
a small screen/keyboard and an Intel Atom processor.
On 08/13/2011 09:09 PM, Alex Malyava wrote:
> What's the benefit of net-books?
> Size, weight, battery life?
> they are cheaper, but not that much - cheapest 15" notebooks are $280...320.
> CPU and memory are also not as good as in notebooks.
>
> Where you gonna use it?
>
> If someone tested net-book+radio configuration and it runs no problem 100% -
> I can be convinced that there is no reason to pay more for notebook and
> carry more weight to some DX country.
>
> AM
>
------------------------------
Message: 16
Date: Sun, 14 Aug 2011 13:26:45 +0000
From: "Nigel A. Gunn, W8IFF/G8IFF" <nigel@xxxxx.xxx>
To: John Allen <john@xxxxxxxxxxxxxxxxxx.xxx>
Cc: 'yccc' <yccc@xxxx.xxx>, 'amsat-bb' <amsat-bb@xxxxx.xxx>,
tjjapha@xxxxxxxxx.xxxx 'obo' <obo@xxxxx.xxx>
Subject: [amsat-bb] Re: [YCCC] Netbooks
Message-ID: <4E47CD15.6060608@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Try and get Linux Mint, No version is crippled and it's free,
On 08/13/2011 08:20 PM, John Allen wrote:
> By the way, try to get Win 7 Home Premium and avoid the "crippled" Win 7
starter
> edition if you can.
>
> John K1AE
------------------------------
Message: 17
Date: Sun, 14 Aug 2011 09:32:35 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
To: ans <ans@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] FW: [ans] ANS-226 AMSAT Weekly Bulletins
Message-ID: <004501cc5a86$a08d3cf0$e1a7b6d0$@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
AMSAT NEWS SERVICE
ANS-226
***[Keep watch with ANS for any late breaking details of ARRISat-1]***
ANS is a free, weekly, news and information service of AMSAT North
America, The
Radio Amateur Satellite Corporation. ANS reports on the activities of
a
worldwide group of Amateur Radio operators who share an active
interest in
designing, building, launching and communicating through analog and
digital
Amateur Radio satellites.
Please send any amateur satellite news or reports to:
ans-editor@xxxxx.xxx
In this edition:
* ARISSat-1/KEDR at +10 Days: ON-ORBIT and OPERATIONAL
* BOD Ballot Reminder
* Send For Your ARISSat-1/KEDR Certificates
* 2011 AMSAT Space Symposium Call for Papers Continues & Satellite
Shorts
* 2011 AMSAT Symposium and Annual Meeting Registration Now Open
* Reminder: The DARA Matching Gift Challenge Runs Until September 1
* ARISS Status - 8 August 2011
* AMSAT Contest
* ARISSat-1 Battery is failing faster than expected
SB SAT @ AMSAT $ANS-226.01
ARISSat-1/KEDR at +10 Days: ON-ORBIT and OPERATIONAL
AMSAT News Service Bulletin 226.01
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.01
Hundreds of reception reports have been received since ARISSat-1/KEDR
was deployed from the ISS. Full operational capability of the satel-
lite has been confirmed in the 10 days since the start of the mission
on August 3.
The satellite's power system monitors the battery voltage and
switches between High power mode (continuous transmission) when
sunlight is charging the battery and Low power mode (40 seconds
transmit/2 minutes idle) when in eclipse. Telemetry data shows
that the ARISSat-1 Battery voltage is decreasing each eclipse
period. It therefore is taking longer for the battery to charge
up to 32.5V to allow the switch from Low Power to High Power when
the satellite enters an illumination period.
Kenneth Ransom, N5VHO has plotted the battery min/max for the last
8 days. The data shows that the battery voltage is decreasing at a
faster rate than expected. Kenneth's graph can be found on the
arissat1.org site under FAQ: http://tinyurl.com/3e5c2y8 (arissat1.org)
The effect of this is that ARISSat-1/KEDR remains in Low power mode
for a period of time after exiting eclipse. The team recommend that
users take advantage of the High Power mode as much as possible over
the next few days.
435 MHz - 145 MHz Linear Transponder - OPERATIONAL
--------------------------------------------------
The linear transponder operates in Mode U/V (70 cm Up, 2m Down). It
is an 16 KHz wide inverting passband. The convention is to TX LSB on
the 435 MHz uplink and RX USB on the 145 MHz downlink. Several amateur
radio operators have been reporting successful contacts via the linear
transponder.
After the initial success with the linear transponder reported by
KO4MA, K8YSE, KD8CAO, and JN1GKZ last week news of addition contacts
have been received from amateur radio operators worldwide:
+ Henk, PA3GUO uplinked an SSTV signal to the linear transponder and
received the picture on the downlink. He posted a copy of the rec-
cecived image at:
http://www.pa3guo.com/pa3guo_arissat1_sstv_9aug2011_0258utc.jpg
His station configuration was:
Uplink HW: TS2000X, 435MHz, 5W RF power + 12 elements beam
Uplink SW: MMSSTV + HRD (doppler control)
Downlink HW: FunCubeDongle (SDR) + SP-2000 preamp + 2x6 elements
beam
Downlink SW: MMSSTV + DK3WN Satcontrol (doppler/freq control) +
HDSDR
+ Andre, ZS2BK reported a successful two-way CW contact with Pierre,
ZS6A on August 5.
+ Alex, VK5ALX reported a contact with Geoff, VK2ZAZ on August 6.
+ Bruce, VE9QRP was able to access the linear transponder with 40
watts
into a Lindenblad on TX and another omni on receive. Bruce
commented,
"It's an amazing thrill to work our AMSAT SDX for the first time,
and
my sense is that any VO-52 class station should be able to hear its
downlink."
+ Luciano, PY5LF had a contact with Roland, PY4ZBZ and recorded it:
http://www.youtube.com/watch?v=oJ2Gujm2vtc
145.950 MHz FM Downlink - OPERATIONAL
145.919 MHz CW Beacons - OPERATIONAL
------------------------------------
The CW transmissions include the satellite callsign ID RS01S, select
telemetry, and callsigns of people actively involved with the ARISS
program.
145.920 MHz SSB BPSK-1000 Telemetry - OPERATIONAL
-------------------------------------------------
AMSAT needs your telemetry from ARISSat-1/KEDR. Since there are no
"Whole Orbit Data" storage mechanisms onboard ARISSat-1/KEDR, your
submissions are the only way for AMSAT to collect the spacecraft
telemetry and KURSK experiment results.
+ Recorded file ARISSat-1/KEDR and Kursk telemetry CSV files (in the
ARISSatTLM folder) can be sent as an e-mail attachment to:
telemetry@xxxxxxxxxx.xxx
+ If you are running ARISSatTLM and receiving the signal "live"
from ARISSat-1/KEDR, please enable the telemetry forwarding option.
+ The latest telemetry can be seen LIVE on your computer or cell
phone at: http://www.arissattlm.org/mobile
Peter Miller, W1AMJ, the Hartford Hobby Radio writer published a
story about the deployment of ARISSat-1 in the Hartford Examiner
newspaper and at: http://tinyurl.com/4yo3l2m (Examiner.com)
NASA Education Office is getting the word out on ARISSat-1 in their
article, "Hammin' It Up":
http://www.nasa.gov/audience/foreducators/hammin-it-up_prt.htm
Also, the extensive list of ARISSat-1/KEDR media links in this week's
ARISS Status Report, in a bulletin below.
[ANS thanks the ARISSat-1/KEDR Team for the above information]
SB SAT @ AMSAT $ANS-226.02
BOD Ballot Reminder
AMSAT News Service Bulletin 226.02
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.02
Ballots for the AMSAT-North America 2011 Board of Directors election
have been mailed to all members. To have your vote count you must
return your ballot by mail to:
AMSAT-NA
850 Sligo Ave #600
Silver Spring, MD, 20910
Ballots must arrive at the AMSAT Office by the close of business,
September 15, 2011.
Four director's terms expire this year:
Barry Baines, WD4ASW
Alan Biddle, WA4SCA
Drew Glasbrenner, KO4MA
Tony Monteiro, AA2TX
Seven nominations have been received for the open seats. Listed
alphabetically they are:
Barry Baines, WD4ASW
Alan Biddle, WA4SCA
Steve Coy, K8UD
Drew Glasbrenner, KO4MA
Mark Hammond, N8MH
Tony Monteiro, AA2TX
Patrick E. Stoddard, WD9EWK
Select no more than four candidates on your ballot. The four candi-
dates receiving the highest number of votes will be seated as full
Board members for two year terms. The two candidates receiving the
next highest number of votes will be seated as alternate Board mem-
bers for one year terms.
[ANS thanks the AMSAT Office the above information]
SB SAT @ AMSAT $ANS-226.03
Send For Your ARISSat-1/KEDR Certificates
AMSAT News Service Bulletin 226.03
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.03
Send For Your ARISSat-1/KEDR Certificates
When you receive the downlink signal from ARISSat-1/KEDR you are
invited to send your report to the following e-mail boxes. You will
receive a PDF certificate by return e-mail.
Students and school groups are especially welcome! We look forward
to your report!
Your report must contain the following information:
1) The signal you received:
a) the secret word*,
b) an SSTV image, or,
c) telemetry data
2) Your name or group name
3) The date/time of reception
4) Your e-mail address of where to send your certificate. You will
receive a PDF certificate via email.
Here are the e-mail boxes to send your reports:
Secret word* contest to: secretword@xxxxxxxx.xxx
SSTV image to: sstvreport@xxxxxxxx.xxx
Telemetry data to: tlmreport@xxxxxxxx.xxx
(either digital or voice report of the data you received)
Received BPSK telemetry and .CSV files should continue to be
sent to: telemetry@xxxxxxxxxx.xxx.
* Those who do hear the secret word or call sign please do not put
it out to the world. That would ruin the contest for those still
waiting for their station to be in range.
You can find the details of the ARISSat-1/KEDR radio frequencies,
links to telemetry decoding software and mission details on-line at:
+ http://www.amsat.org
+ http://arissat1.org
[ANS thanks the ARISSat-1/KEDR Team for the above information]
SB SAT @ AMSAT $ANS-226.04
2011 AMSAT Space Symposium Call for Papers Continues & Satellite
Shorts
AMSAT News Service Bulletin 226.04
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.04
The call for papers continues for the 2011 AMSAT Space Symposium
to be held Friday, November 4th through Sunday, November 6th at
the Wyndham San Jose Hotel, San Jose, California.
Proposals for papers, symposium presentations and poster presenta-
tions are invited on any topic of interest to the amateur satellite
community.
We request a tentative title of your presentation as soon as possible,
with final copy submitted by October 1, 2011 for inclusion in the
printed proceedings.
Abstracts and papers should be sent to Dan Schultz, N8FGV, at:
n8fgv@xxxxx.xxx.
********************************************************
Local AMSAT Net in New York
The next2 dates for the "HV Satcom net is august 18 &
September 1; & the time for the net is 8PM local and 0000UTC
Found on Echo link node of "N2EYH-L"!
More info: www.hvsatcom.org
[ANS thanks Dan Schultz, N8FGV & Stu Balanger, WA2BSS, for the above
information]
SB SAT @ AMSAT $ANS-226.05
2011 AMSAT Symposium and Annual Meeting Registration Now Open
AMSAT News Service Bulletin 226.05
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.05
AMSAT announces the 2011 AMSAT Space Symposium will be held on Friday,
November 4th through Sunday, November 6th in San Jose, CA. Our annual
gathering will feature:
+ Space Symposium with Amateur Satellite Presentations
+ Operating Techniques, News, & Plans from the Amateur Satellite World
+ Board of Directors Meeting open to AMSAT members (Nov. 3-4)
+ Meet Board Members and Officers
+ Annual General Membership Meeting
+ Annual Banquet-Keynote Speaker and Door Prizes
The 2011 Symposium hotel and registration web pages are now available
on the AMSAT web site. You may register for the Symposium and Annual
Banquet at the AMSAT Store:
http://www.amsat-na.com/store/SymposiumReg.php
Visit the Symposium and Annual General Meeting web page for details
and the latest information:
http://www.amsat.org/amsat-new/symposium/2011/index.php
Symposium Registration including a copy of the Proceedings is:
+ $45 per person until September 19, 2011
+ $50 per person starting September 20, 2011
+ $55 per person at the door
The Saturday evening banquet is $45 per person. The Sunday morning
Area Coordinator's Breakfast is $15 per person.
The hotel selected is the Wyndham San Jose, close to the airport. The
AMSAT discount rate is $79.00+taxes per night. The reservation block
code when calling the hotel directly is "AMSAT". The hotel telephone
number is 408-453-6200. If you are making reservations on-line use
1031FSJAM for the group code. The direct link to the hotel web page
is: http://www.wyndham.com/hotels/SJCAP/main.wnt
If you are planning to book a room on dates other than November 2,
3, 4, 5, you will have to call the hotel directly and ask for *in-
house reservations*. You can get the $79 rate 3 days before and 3
days after the above dates but you cannot book the room on their
website. Any problems, give Martha a call at the AMSAT Office:
301-589-6062.
[ANS thanks the 2011 Symposium Committee for the above information]
SB SAT @ AMSAT $ANS-226.06
Reminder: The DARA Matching Gift Challenge Runs Until September 1
AMSAT News Service Bulletin 226.06
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.06
Donate to AMSAT and DARA will contribute matching funds. The Dayton
Amateur Radio Association (DARA) fund raising challenge for AMSAT
continues until September 1, 2011. DARA will match $1.00 for every
$3.00 donated up to $5,000.00.
AMSAT kicked off the fundraising campaign at the Hamvention, where
donations began count for the challenge. Please consider making a
donation to AMSAT and have your effort multiplied. We appreciate
DARA's support for AMSAT!
Your donation will support our "Getting AMSAT Back Into Space"
campaign by providing needed funds for AMSAT Project Fox Cubesat
which will provide a 2M to 70cm FM transponder matching the per-
formance of AO-51.
+ On-line at the AMSAT Store:
http://www.amsat-na.com/store/donation.php
+ You may click on the donation widget on our http://www.amsat.org
web page.
+ You may call Martha at the AMSAT Office:
From the US call toll free at: (888) 322-6728
From all other locations call: (301) 589-6062
and you can send a fax to: (301) 608-3410
+ You can send donations by postal mail to:
AMSAT-NA
850 Sligo Ave #600
Silver Spring, MD, 20910
[ANS thanks AMSAT Headquarters for the above information]
SB SAT @ AMSAT $ANS-226.07
ARISS Status - 8 August 2011
AMSAT News Service Bulletin 226.07
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.07
1. Scouts Experience Successful ARISS Contact
Scouts attending Space Jam 5 held at the Octave Chanute Air Museum in
Rantoul, Illinois participated in an Amateur Radio on the
International Space Station (ARISS) contact on Saturday, August 6.
This was a telebridge contact via station WH6PN in Hawaii. Scouts put
18 questions about life in space to on-orbit astronaut Mike Fossum,
KF5AQG. Over 250 Boy Scouts and Girl Scouts as well as 100 scout
leaders attended the event. Besides the several merit badge workshops
covering electronics, computers and others, activities included a
balloon launch (with an on-board repeater) and a ham radio station,
complete with satellite antennas.
2. ARISSat-1 Deployed
ARISSat-1, an educational satellite that was developed by AMSAT (Radio
Amateur Satellite Corporation) in cooperation with the NASA Office of
Education ISS National Lab, Amateur Radio on the International Space
Station (ARISS) and RSC-Energia, was deployed on Wednesday, August 3
during Russian EVA-29. The satellite contains an experiment developed
by Kursk State Technical University students in Russia. Students and
others may listen to ARISSat-1 to hear the 24 greetings in 15
languages (secret words included), to receive and decode spacecraft
and experiment telemetry and to capture Slow Scan Television (SSTV)
images. (Certificates are available to those who report receiving
signals from the satellite. Visit the ARISSat Web site for more
information.) ARISSat activities provide an excellent opportunity to
pique children's interest in the areas of Science, Technology,
Engineering and Math (STEM).
ARISSat-1 Web site:
http://www.arissat1.org/v3/
To view SSTV images:
http://www.amsat.org/amsat/ariss/SSTV/
NASA article, "Hammin' It Up"
http://www.nasa.gov/audience/foreducators/hammin-it-up_prt.htm
[ANS thanks Carol, KB3LKI, for the above information]
SB SAT @ AMSAT $ANS-226.08
AMSAT Contest
AMSAT News Service Bulletin 226.08
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.08
AMSAT is happy to announce the ARISSat-1 Chicken Little Contest.
This is your opportunity to calculate, or guess, when ARISSat-1
falls out of orbit. This is defined as the time it crosses an
altitude of 78 kilometers, which is considered to be the point of
no return. While not part of the contest, the actual reentry may
be visible depending on location. Reports are encouraged.
As in the past, we will have three divisions:
+ Student category for Kindergarten through grade 8
+ Student category for High School, grades 9 through 12
+ All others will be in the adult category.
In addition to individual students, we encourage classes or organ-
izations such as science clubs to make group submissions. Submissions
are limited to one per person or group. Members of a group making a
submission may not submit a second, individual entry.
+ Adults and individual students should include their name and amateur
callsign if they have one.
+ Individual students should also give their grade in school.
+ Student groups should include the name of their group or class,
school, and which category they represent.
+ Please give the UTC date in the format of day, month, year, hours,
minutes, and seconds.
+ Finally, we would like to know your city, state, province or
region, and your country.
+ Submissions will close on 15 September 2011 at 23:59:00 UTC.
The closest predictions in each category will be recognized for their
achievement. Send your submissions to CHICKENLITTLE@xxxxxxxx.xxx.
Good luck!
[ANS thanks ARISSat-1/KEDR team for the above information]
SB SAT @ AMSAT $ANS-226.09
ARISSat-1 Battery is failing faster than expected
AMSAT News Service Bulletin 226.09
From AMSAT HQ SILVER SPRING, MD.
August 14, 2011
To All RADIO AMATEURS
BID: $ANS-226.09
ARISSat-1 Battery is Failing Faster than Expected
The ARISSat-1 battery performed as expected during the first week of
operation. Lower voltages during eclipse began to show up in the
telemetry on 10 Aug 2011. The voltages during eclipse have continued
to decline causing the satellite to reset and go into Emergency Power
Mode on 12 Aug. After reset, the satellite MET (Mission Elapsed Timer)
goes to 000, waits during the 15 minute TX delay, the power management
software checks the current voltage and power values and determines
what power mode to operate the satellite. The power mode is
re-determined at fixed intervals, especially during illuminated
periods to provide the most transmitted signals while protecting the
battery.
Additional information and explanation about the workings of the
ARISSat-1/RadioSkaf-V power system can be found on the arissat1.org
web site under the FAQ section.
The ARISSat-1 team is closely monitoring the situation and is pleased
with how well the power management software is controlling the battery
usage to prolong the lifetime of the battery and the satellite as much
as possible.
[ANS Thanks Gould Smith, WA4SXM for the ARISSat-1 team]
In addition to regular membership, AMSAT offers membership in the
President's
Club. Members of the President's Club, as sustaining donors to AMSAT
Project
Funds, will be eligible to receive additional benefits. Application
forms are
available from the AMSAT Office.
73,
This week's ANS Editor,
Dee Interdonato, NB2F
Nb2f at amsat dot org
------------------------------
_______________________________________________
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 6, Issue 463
****************************************
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