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CX2SA > SATDIG 15.10.09 20:23l 875 Lines 29523 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: On the possibility of imaging AO-40 with earth bound
telescopes... (David - KG4ZLB)
2. Mexico EK09vb Operation 15-18 October (John Papay)
3. Re: AMSAT Symposium News Posted to the Web (Bob McGwier)
4. Re: AMSAT Symposium News Posted to the Web (W4ART Arthur Feller)
5. Pass schedule for DM07 Oct 17th (w6zkh@xxxxxxx.xxxx
6. President's Annual Meeting Powerpoint Presentation Posted on
the Web (JoAnne Maenpaa)
7. Re: Let's Go! (Samudra Haque N3RDX)
8. Re: Let's Go! (Jeff Davis)
9. Re: Can we get them to fix AO-40 first then? (Rocky Jones)
10. Re: On the possibility of imaging AO-40 with earth bound
telescopes... (STeve Andre')
11. Where's the Beef? (Frank H. Bauer)
12. Re: AMSAT Symposium News Posted to the Web (Steve Meuse)
13. Re: Can we get them to fix AO-40 first then? (Bob McGwier)
14. Re: AMSAT Symposium News Posted to the Web (Steve Meuse)
15. Re: AMSAT Symposium News Posted to the Web (Bob McGwier)
----------------------------------------------------------------------
Message: 1
Date: Thu, 15 Oct 2009 09:12:59 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: On the possibility of imaging AO-40 with earth
bound telescopes...
To: amsat-bb@xxxxx.xxx
Message-ID: <4AD71FDB.8080100@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Can't we just ask one of the guys on the ISS to lean out of the window,
take a quick pic with his Canon Snappy as it comes round and then e-mail
it to us ? :-D
--
David
KG4ZLB
www.kg4zlb.com
Tim - N3TL wrote:
> Please see Page 19 of the May-June 2008 issue of The AMSAT Journal.
>
> Patrick Seitzer, WA4DSR, provided a photo of AO-40 taken by the University
of Michigan's Curtis-Schmidt Telescope at Cerro Tololo Inter-American
Observatory in Chile. Following is information from a University of Michigan
Web page about the telescope:
>
> "The Curtis-Schmidt telescope is a 0.61 meter aperture f/3.5 Schmidt
telescope located at the Cerro Tololo Inter-American Observatory, about 500
km north of Santiago, Chile. This telescope was originally installed at the
University of Michigan's Portage Lake Observatory in 1950, and moved to the
much clearer skies of north central Chile in 1966.
> It is named for Heber D. Curtis, Director of the University of Michigan
Observatories from 1930 until 1942.
> The telescope is dedicated to optical studies of artificial space debris
for NASA's Orbital Debris Program Office at the Johnson Space Center.
Projects include optical surveys for debris and follow-up observations to
determine orbits and photometric properties of recently discovered debris."
>
> If you find the Journal photo, you'll see a field with dozens of blurred
stars and one sharp litttle white dot, which is AO-40. I believe it's safe
to say that obtaining an image with the detail necessary to try assess
damage is impossible.
>
> 73 to all,
>
> Tim - N3TL
>
>
>
>
> ________________________________
> From: Mark VandeWettering <kf6kyi@xxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Thursday, October 15, 2009 2:57:40 AM
> Subject: [amsat-bb] On the possibility of imaging AO-40 with earth bound
telescopes...
>
>
>
> It's not going to work. AO-40 just isn't big enough. For fun,
> let's worth through
> some of the details.
>
>
>
>
>
>
>
> Table 1. Nominal Orbit Parameters for AO-40
> Orbit Parameter Value
> Semimajor Axis (km) 36,245
> Perigee Height (km) 1,042
> Apogee Height (km) 58,691
> Eccentricity 0.797
> Inclination (deg) 6.04
> Period (hours) 19.1
>
> Let's look at a couple of potential telescopes. The short tube
> refractor that you linked to has an 80 mm (roughly 3 inch) aperature.
> According to the Rayleigh criterion, that scope should be able to
> resolve angles as small as about 1.5 arc seconds. At perigee, the
> resolving power is 1042000 * tan(1.5 arc seconds), or about 7.5 meters
> (or 25 feet). To increase the resolution by a factor of 2, you need
> to to double the aperature. To get resolutions down to 1/2 a foot,
> you need an aperature 50x larger, or 150 inches.
>
> This doesn't take into account any effects of atmosphere either.
> it's actually fairly rare to get sub arcsecond resolution from any
> earthbound telescope without using adaptive optics.. This limits the
> practicality of high resolution imaging.
>
> Impressive photos of the space shuttle, ISS and HST have been taken
> using amateur equipment, but these objects are both closer and an
> order of magnitude larger than AO-40. While we might be able to
> measure spin rate and the like by measuring the brightness curve,
> actual imaging of the satellite isn't likely.
>
> 73 Mark K6HX
> _______________________________________________
> 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: 2
Date: Thu, 15 Oct 2009 09:18:53 -0400
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] Mexico EK09vb Operation 15-18 October
To: amsat-bb@xxxxx.xxx
Message-ID: <799826.54419.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Ismael, XE1AY, reports that he will be active on FM
birds AO-51, AO-27 and SO-50 from EK09vb from 15 October
through 18 October 2009.
John Papay
john@xxxxxx.xxx
------------------------------
Message: 3
Date: Thu, 15 Oct 2009 09:56:59 -0400
From: Bob McGwier <rwmcgwier@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT Symposium News Posted to the Web
To: "'Amsat BB'" <amsat-bb@xxxxx.xxx>
Message-ID: <4AD72A2B.8030003@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Did I ever tell you about the time I cranked 130w on 435 in Providence,
R.I. and I received an admonishing phone call from OTIS, AFB asking me
if I was on the air, reminding me of the limitations and my obligation
to warn them? I hope I was not the cause of a false alarm, but I don't
know. I had never spoken to them and didn't even know about the
exclusion zones. This was ancient days, right after AO-10 was
launched. I don't know the state of the rules or enforcement today but
that caused some consternation let me tell you. Fred at least has the
obligation to ask what the rules are currently.
Bob
N4HY
Ben Jackson wrote:
> Sanford, Fred wrote:
>
>> I hope that AMSAT NA does not use an 70cm uplink, because that band
>> is not available for transmitting in all areas of the US. I live
>> near Cape Cod, MA and 70cm is not available for transmitting because
>> of PAVE PAWS.
>>
>
> Hi Fred:
>
> I don't think PAVE PAWS prohibits transmission, it only affected
> repeater operation. At least I haven't heard anything regarding that,
> and I was fairly active on 70cm until last Monday when W1WNS/R was PAVE
> PAWSed.
>
> ~Ben
>
>
>
--
(Co)Author: DttSP, Quiktrak, PowerSDR, GnuRadio
Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
NJQRP, QRP ARCI, QCWA, FRC.
"You don't need to see the whole staircase, just
take the first step.", MLK.
Twitter:rwmcgwier
Active: Facebook,Myspace,LinkedIn
------------------------------
Message: 4
Date: Thu, 15 Oct 2009 10:22:47 -0400
From: W4ART Arthur Feller <afeller@xxxx.xxx>
Subject: [amsat-bb] Re: AMSAT Symposium News Posted to the Web
To: Bob McGwier <rwmcgwier@xxxxx.xxx>
Cc: 'Amsat BB' <amsat-bb@xxxxx.xxx>
Message-ID: <AAB1EF04-594F-4172-AD4D-3CC4DBAC383F@xxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes
Specific information is available on line. Here's the text.
US7 In the band 420?450 MHz and within the following areas, the peak
envelope power output of a transmitter employed in the amateur service
shall not exceed 50 watts, unless expressly authorized by the FCC
after mutual agreement, on a case-by-case basis, between the District
Director of the applicable field office and the military area
frequency coordinator at the applicable military base. For areas (e)
through (g), the appropriate military coordinator is located at
Peterson AFB, CO.
(a) Arizona, Florida, and New Mexico.
(b) Those portions of California and Nevada that are south of latitude
37?10? N.
(c) That portion of Texas that is west of longitude 104? W.
(d) Within 322 km (200 miles) of Eglin AFB, FL (30?30? N, 86?30?
W); Patrick AFB, FL (28?21? N, 80?43? W); and the Pacific Missile
Test Center, Point Mugu, CA (34?09? N, 119?11? W).
(e) Within 240 km (150 miles) of Beale AFB, CA (39?08? N, 121?26?
W).
(f) Within 200 km (124 miles) of Goodfellow AFB, TX (31?25? N,
100?24? W) and Robins AFB, GA (32?38? N, 83?35? W).
(g) Within 160 km (100 miles) of Clear, AK (64?17? N, 149?10? W);
Concrete, ND (48?43? N, 97?54? W); and Otis AFB, MA (41?45? N,
70?32? W).
So, 435-438 MHz is available with limited output power. No limit on
antenna again, that I see.
I hope this helps.
73, art.....
W4ART Arlington VA
On 15-Oct-2009, at 9:56 AM, Bob McGwier wrote:
> Did I ever tell you about the time I cranked 130w on 435 in
> Providence,
> R.I. and I received an admonishing phone call from OTIS, AFB asking me
> if I was on the air, reminding me of the limitations and my obligation
> to warn them? I hope I was not the cause of a false alarm, but I
> don't
> know. I had never spoken to them and didn't even know about the
> exclusion zones. This was ancient days, right after AO-10 was
> launched. I don't know the state of the rules or enforcement today
> but
> that caused some consternation let me tell you. Fred at least has the
> obligation to ask what the rules are currently.
>
> Bob
> N4HY
>
>
> Ben Jackson wrote:
>> Sanford, Fred wrote:
>>
>>> I hope that AMSAT NA does not use an 70cm uplink, because that band
>>> is not available for transmitting in all areas of the US. I live
>>> near Cape Cod, MA and 70cm is not available for transmitting because
>>> of PAVE PAWS.
>>>
>>
>> Hi Fred:
>>
>> I don't think PAVE PAWS prohibits transmission, it only affected
>> repeater operation. At least I haven't heard anything regarding that,
>> and I was fairly active on 70cm until last Monday when W1WNS/R was
>> PAVE
>> PAWSed.
>>
>> ~Ben
>>
>>
>>
>
>
> --
> (Co)Author: DttSP, Quiktrak, PowerSDR, GnuRadio
> Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
> NJQRP, QRP ARCI, QCWA, FRC.
> "You don't need to see the whole staircase, just
> take the first step.", MLK.
> Twitter:rwmcgwier
> Active: Facebook,Myspace,LinkedIn
>
>
> _______________________________________________
> 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
What we can do is to live out our lives as best we can with purpose,
and with love, and with joy. We can use each day to show those who
are closest to us how much we care about them, and treat others with
the kindness and respect that we wish for ourselves. We can learn
from our mistakes and grow from our failures. And we can strive at
all costs to make a better world, so that someday, if we are blessed
with the chance to look back on our time here, we know that we spent
it well; that we made a difference; that our fleeting presence had a
lasting impact on the lives of others.
- Barak
Obama, 29 Aug 2009
------------------------------
Message: 5
Date: Thu, 15 Oct 2009 14:22:35 +0000 (UTC)
From: w6zkh@xxxxxxx.xxx
Subject: [amsat-bb] Pass schedule for DM07 Oct 17th
To: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<1567714735.10054541255616555208.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxx
xxxx.xxx>
Content-Type: text/plain; charset=utf-8
The following pass times and satellites for a short trip up to DM07. I
should be operating on at least 1 of the 3 passes, if not all. Sorry, no
AO-51 passes fit my schedule.
Oct 17, 2009
SO-50 @ 1759 utc
AO-27 @ 2052 and 2231 utc
QSL direct (sase not required) or eQSL.cc
John W6ZKH
DM06
------------------------------
Message: 6
Date: Thu, 15 Oct 2009 09:56:29 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
Subject: [amsat-bb] President's Annual Meeting Powerpoint Presentation
Posted on the Web
To: <amsat-bb@xxxxx.xxx>
Message-ID: <001d01ca4da7$ade1e420$09a5ac60$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hello Everyone,
A link to AMSAT President, Barry Baines, WD4ASW Annual Meeting Powerpoint
Presentation has been added to our web at http://www.amsat.org .
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
Editor, AMSAT News Service
Copy Editor, AMSAT Journal
------------------------------
Message: 7
Date: Thu, 15 Oct 2009 10:57:40 -0400
From: Samudra Haque N3RDX <n3rdx@xxxxx.xxx>
Subject: [amsat-bb] Re: Let's Go!
To: Jeff Davis <stuckbit@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<d8c724880910150757y10cc09fcn21f73ce00c9122a9@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
$100 now and $100 later is a nice idea. But to a project manager that
might mean "there is no guarantee that 2nd $100 will be available".
But it is a good start..
Should we expect a note from our AMSAT-NA treasurer with a "call for
donations" and a public website to monitor donations from members by
region and other statistics ? Those metrics will be desirable for
motivation to "pay up" and get recognition in the process. How has it
worked in the past ?
-samudra, N3RDX
On Thu, Oct 15, 2009 at 7:45 AM, Jeff Davis <stuckbit@xxxxx.xxx> wrote:
> On Wed, Oct 14, 2009 at 3:42 PM, Samudra Haque <samudra.haque@xxxxx.xxx>
wrote:
>>
>> if a gross estimate of $200,000 is needed for a stand-alone cubesat
>> the average per capita support required from these active amsat-na
>> members would be: $200,000 divided by (50% of 3800) ?= $200,000 / 1900
>> = $263 or so.
>
> Or perhaps a bit more realistically ... we need 1000 people to donate
> $100 this year, and $100 next year.
>
> Far and away the best bargain to come out of *any* AMSAT organization
> in the 21st century!
>
> 73 de Jeff, KE9V
>
------------------------------
Message: 8
Date: Thu, 15 Oct 2009 07:45:23 -0400
From: Jeff Davis <stuckbit@xxxxx.xxx>
Subject: [amsat-bb] Re: Let's Go!
To: Samudra Haque <samudra.haque@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<c095eea20910150445h787e542bra7e6ca8e69d5f432@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Wed, Oct 14, 2009 at 3:42 PM, Samudra Haque <samudra.haque@xxxxx.xxx>
wrote:
>
> if a gross estimate of $200,000 is needed for a stand-alone cubesat
> the average per capita support required from these active amsat-na
> members would be: $200,000 divided by (50% of 3800) ?= $200,000 / 1900
> = $263 or so.
Or perhaps a bit more realistically ... we need 1000 people to donate
$100 this year, and $100 next year.
Far and away the best bargain to come out of *any* AMSAT organization
in the 21st century!
73 de Jeff, KE9V
------------------------------
Message: 9
Date: Thu, 15 Oct 2009 10:27:57 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
To: <peter.guelzow@xxxxxx.xx>, <samudra.haque@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W1580DC70580CC809F1E4DFD6C50@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Peter.
In the current configuration (or the last known config) of the vehicle does
the vehicle have sufficient solar illumination to "spin" and maintain the DC
busses without a battery?
Robert WB5MZO
_________________________________________________________________
Hotmail: Powerful Free email with security by Microsoft.
http://clk.atdmt.com/GBL/go/171222986/direct/01/
------------------------------
Message: 10
Date: Thu, 15 Oct 2009 12:38:35 -0400
From: "STeve Andre'" <andres@xxx.xxx>
Subject: [amsat-bb] Re: On the possibility of imaging AO-40 with earth
bound telescopes...
To: amsat-bb@xxxxx.xxx
Message-ID: <200910151238.36040.andres@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
This is interesting; I've learned stuff because of this.
Not that it's practical, but what could Hubble see? The first question
would be can it be positioned to stare "down", and then how well
would it see something that close and fast?
--STeve Andre'
wb8wsf en82
On Thursday 15 October 2009 08:57:59 Tim - N3TL wrote:
> Please see Page 19 of the May-June 2008 issue of The AMSAT Journal.
>
> Patrick Seitzer, WA4DSR, provided a photo of AO-40 taken by the University
of Michigan's Curtis-Schmidt Telescope at Cerro Tololo Inter-American
Observatory in Chile. Following is information from a University of Michigan
Web page about the telescope:
>
> "The Curtis-Schmidt telescope is a 0.61 meter aperture f/3.5 Schmidt
telescope located at the Cerro Tololo Inter-American Observatory, about 500
km north of Santiago, Chile. This telescope was originally installed at the
University of Michigan's Portage Lake Observatory in 1950, and moved to the
much clearer skies of north central Chile in 1966.
> It is named for Heber D. Curtis, Director of the University of Michigan
Observatories from 1930 until 1942.
> The telescope is dedicated to optical studies of artificial space debris
for NASA's Orbital Debris Program Office at the Johnson Space Center.
Projects include optical surveys for debris and follow-up observations to
determine orbits and photometric properties of recently discovered debris."
> ?
> If you find the Journal photo, you'll see a field with dozens of blurred
stars and one sharp litttle white dot, which is AO-40.? I believe it's safe
to say that obtaining an image with the detail necessary to try assess
damage is impossible.
> ?
> 73 to all,
>
> Tim - N3TL
>
>
>
>
> ________________________________
> From: Mark VandeWettering <kf6kyi@xxxxx.xxx>
> To: amsat-bb@xxxxx.xxx
> Sent: Thursday, October 15, 2009 2:57:40 AM
> Subject: [amsat-bb] On the possibility of imaging AO-40 with earth bound
telescopes...
>
> > Has there been any serious attempt to take a photograph of the damaged
> > bird using ground based optical telescopes while it is in sunlight ?
>
> It's not going to work.? AO-40 just isn't big enough.? For fun,
> let's worth through
> some of the details.
>
> > With modern telescopes such as
> >
http://www.refractortelescopes.co.uk/reviews/orion/orion-shorttube-80-a-refrac
tor-telescope/
> > or similiar and a modern digital camera and a known RA/DEC co-ordinate
> > of the satellite at any point in its orbit, it should be possible get
> > a fairly decent picture of what is still up there...
>
> > Note RA / DEC are astronomy co-ordinates which should be able to be
> > calculated from AZ/EL or TLE, but I may not be able to do it myself.
>
> > We don't need to track it, but just to image it in several consecutive
> > frames. From:
http://www.emergentspace.com/pubs/AIAA_GNC_2002_AMSAT_A040.pdf
>
> Table 1. Nominal Orbit Parameters for AO-40
> Orbit Parameter Value
> Semimajor Axis (km) 36,245
> Perigee Height (km) 1,042
> Apogee Height (km) 58,691
> Eccentricity 0.797
> Inclination (deg) 6.04
> Period (hours) 19.1
>
> Let's look at a couple of potential telescopes.? The short tube
> refractor that you linked to has an 80 mm (roughly 3 inch) aperature.
> According to the Rayleigh criterion, that scope should be able to
> resolve angles as small as about 1.5 arc seconds.? ? At perigee, the
> resolving power is 1042000 * tan(1.5 arc seconds), or about 7.5 meters
> (or 25 feet).? ? To increase the resolution by a factor of 2, you need
> to to double the? aperature.? To get resolutions down to 1/2 a foot,
> you need an aperature 50x larger, or 150 inches.
>
> This doesn't take into account any effects of atmosphere either.
> it's actually fairly rare to get sub arcsecond resolution from any
> earthbound telescope without using adaptive optics..? This limits the
> practicality of high resolution imaging.
>
> Impressive photos of the space shuttle, ISS and HST have been taken
> using amateur equipment, but these objects are both closer and an
> order of magnitude larger than AO-40.? While we might be able to
> measure spin rate and the like by measuring the brightness curve,
> actual imaging of the satellite isn't likely.
>
> 73 Mark K6HX
> _______________________________________________
> 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: Thu, 15 Oct 2009 13:21:10 -0400
From: "Frank H. Bauer" <ka3hdo@xxxxxxx.xxx>
Subject: [amsat-bb] Where's the Beef?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <002401ca4dbb$eaa8baf0$bffa30d0$@xxx>
Content-Type: text/plain; charset="us-ascii"
Robert,
You commented:
"As for AMSAT's ARISSsat transponder. Well we will see if it works. They
are not exactly burning up the track record with success. We have had this
argument and I am willing to sit back and see if it goes, but it is far to
much project for the program. Most of the folks I know at JSC give it less
then 20 percent chance of working...In fact it was a source of mirth at a
recent BDAY party."
All your e-mails give the impression that you are well positioned within JSC
and "know all" that is going on within NASA. But when I did a Search for
your name within the NASA employee and contractor database, the database
comes up empty handed.
Given that I am a "facts and data" kind of guy, what up with this? And how
are you all knowing??? What do you really do for a living?? Who are these
people you are talking to that are so opinionated?
Or are you using another alias besides Robert Oler or Rocky Jones? Or is
all you are posting on this listserv just your own kind of fluff??
Inquiring minds want to know.
Frank, KA3HDO
------------------------------
Message: 12
Date: Thu, 15 Oct 2009 13:44:47 -0400
From: Steve Meuse <smeuse@xxxx.xxx>
Subject: [amsat-bb] Re: AMSAT Symposium News Posted to the Web
To: Bob McGwier <rwmcgwier@xxxxx.xxx>
Cc: 'Amsat BB' <amsat-bb@xxxxx.xxx>
Message-ID: <20091015174447.GA26439@xxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Bob McGwier expunged (rwmcgwier@xxxxx.xxxxx
> Did I ever tell you about the time I cranked 130w on 435 in Providence,
> R.I. and I received an admonishing phone call from OTIS, AFB asking me
> if I was on the air, reminding me of the limitations and my obligation
> to warn them? I hope I was not the cause of a false alarm, but I don't
> know. I had never spoken to them and didn't even know about the
> exclusion zones. This was ancient days, right after AO-10 was
> launched. I don't know the state of the rules or enforcement today but
> that caused some consternation let me tell you. Fred at least has the
> obligation to ask what the rules are currently.
>From Part 97:
(http://www.arrl.org/FandES/field/regulations/news/part97/d-305.html#313)
(f) No station may transmit with a transmitter power exceeding 50 W PEP on
the UHF 70 cm band from an area specified in footnote US7 to ??2.106 of the
FCC Rules, unless expressly authorized by the FCC after mutual agreement, on
a case-by-case basis, between the District Director of the applicable field
facility and the military area frequency coordinator at the applicable
military base. An Earth station or telecommand station, however, may
transmit on the 435-438 MHz segment with a maximum of 611 W effective
radiated power (1 kW equivalent isotropically radiated power) without the
authorization otherwise required. The transmitting antenna elevation angle
between the lower half-power (-3 dB relative to the peak or antenna bore
sight) point and the horizon must always be greater than 10??.
US7 ??2.106 (http://www.fcc.gov/oet/info/maps/us7/)
(e) In the State of Massachusetts within a 160-kilometer (100 mile) radius
around locations at Otis Air Force Base, Massachusetts (latitude 41??45'
North, longitude 70??32' West);
Technically, if you were in R.I. you were not restricted because the regs
specifically state "In the State of Massachusetts". Also, you were exepemt
most likely from the earth station exemption, depending on your ERP and if
you are pointed up :)
-Steve
N1JFU - http://n1jfu.blogspot.com - smeuse@xxxxxxx
------------------------------
Message: 13
Date: Thu, 15 Oct 2009 14:00:57 -0400
From: Bob McGwier <rwmcgwier@xxxxx.xxx>
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <4AD76359.7030601@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
If the power budget were not positive as of the last known
configuration, i.e. solar panels produced enough power to run the
spacecraft AND charge the batteries, we would have been dead long
before the event (whatever it was) because the batteries need to be
charged enough to run us through eclipses. So if the panels were
illuminated there would be sufficient power to run the bus. However,
the IHU software load would be minimal and we would have more than
enough power. However, if the batteries shorted the bus, and drew it
down, then probably nothing would run and we are in the "pray for AO-7"
mode with MUCH better batteries than we had in AO-7, making a repeat
less likely. With AO-10, we got lucky. The thing would just come up
default in a mode that we could use until it finally gave up the ghost.
Bob
Rocky Jones wrote:
> Peter.
>
> In the current configuration (or the last known config) of the vehicle
does the vehicle have sufficient solar illumination to "spin" and maintain
the DC busses without a battery?
>
> Robert WB5MZO
>
> _________________________________________________________________
>
--
(Co)Author: DttSP, Quiktrak, PowerSDR, GnuRadio
Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
NJQRP, QRP ARCI, QCWA, FRC.
"You don't need to see the whole staircase, just
take the first step.", MLK.
Twitter:rwmcgwier
Active: Facebook,Myspace,LinkedIn
------------------------------
Message: 14
Date: Thu, 15 Oct 2009 14:04:28 -0400
From: Steve Meuse <smeuse@xxxx.xxx>
Subject: [amsat-bb] Re: AMSAT Symposium News Posted to the Web
To: Bob McGwier <rwmcgwier@xxxxx.xxx>
Cc: 'Amsat BB' <amsat-bb@xxxxx.xxx>
Message-ID: <20091015180428.GB26439@xxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Steve Meuse expunged (smeuse@xxxx.xxxxx
> (e) In the State of Massachusetts within a 160-kilometer (100 mile) radius
around locations at Otis Air Force Base, Massachusetts (latitude 41??45'
North, longitude 70??32' West);
>
Also, I don't know if this has any legal basis, but technically there is no
such thing as "Otis Air Force Base". Pave Paws is location on Cape Cod Air
Force Station, which is on the Massachusetts Military Reservation. There is
(recently closed) an Otis Massachusetts Air National Guard Base, but OTIS
AFB ceased to exist back in the 60's.
-Steve
N1JFU - http://n1jfu.blogspot.com - smeuse@xxxxxxx
------------------------------
Message: 15
Date: Thu, 15 Oct 2009 14:15:50 -0400
From: Bob McGwier <rwmcgwier@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT Symposium News Posted to the Web
To: Steve Meuse <smeuse@xxxx.xxx>
Cc: 'Amsat BB' <amsat-bb@xxxxx.xxx>
Message-ID: <4AD766D6.1010408@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
That was the source of my confusion as well. My interpretation would be
the rule applies only to OTIS AFB (in this case) and it doesn' exist so
it cannot apply to a nonexistent entity.
Bob
Steve Meuse wrote:
> Steve Meuse expunged (smeuse@xxxx.xxxxx
>
>
>> (e) In the State of Massachusetts within a 160-kilometer (100 mile)
radius around locations at Otis Air Force Base, Massachusetts (latitude
41??45' North, longitude 70??32' West);
>>
>>
>
> Also, I don't know if this has any legal basis, but technically there is
no such thing as "Otis Air Force Base". Pave Paws is location on Cape Cod
Air Force Station, which is on the Massachusetts Military Reservation. There
is (recently closed) an Otis Massachusetts Air National Guard Base, but OTIS
AFB ceased to exist back in the 60's.
>
>
> -Steve
>
> N1JFU - http://n1jfu.blogspot.com - smeuse@xxxxxxx
>
>
>
--
(Co)Author: DttSP, Quiktrak, PowerSDR, GnuRadio
Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
NJQRP, QRP ARCI, QCWA, FRC.
"You don't need to see the whole staircase, just
take the first step.", MLK.
Twitter:rwmcgwier
Active: Facebook,Myspace,LinkedIn
------------------------------
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End of AMSAT-BB Digest, Vol 4, Issue 541
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