February 2008 - AMSAT-BB - mailman.amsat.org

Shoot Sat - add
by Clint Bradford 14 Feb '08

14 Feb '08

The Pentagon's statement... http://www.defenselink.mil/releases/release.aspx?releaseid=11691 Clint Bradford, K6LCS / KAF3359 909-241-7666

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Shoot Sat - add
by Clint Bradford 14 Feb '08

14 Feb '08

The Navy will use a Standard Missile 3 in an attempt to intercept the satellite just prior to it re-entering Earth's atmosphere. It would be "next to impossible" to hit the satellite after that because of atmospheric disturbances. A second goal is to directly hit the fuel tank in order to minimize the amount of fuel that returns to Earth. Joint Chief of Staff chairman Cartwright also said that if an initial shootdown attempt fails, a decision will be made whether to take a second shot. Clint Bradford, K6LCS / KAF3359 909-241-7666

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Re: [aprssig] More than one PCSAT?
by Robert Bruninga 14 Feb '08

14 Feb '08

> More than one PCSAT? Yes, PCSAT contains two identical redundant transponders. The W3ADO-1 side has uplink and downlink on 145.825. Side B (PCSAT-11) has secret uplink, but a downlink on 144.39 over North America (the continent wide APRS channel). The secret uplink is available for special applications if anyone can think of one. If you see both downlinks on 145.825, then it means the CPU has crashed an has cross connected the transmitters for "redundancy". We must send the command to isolate the two sides or we are wasting DOUBLE power each time it transmits on either side. Actually, PCSAT has a total of FOUR callsigns and FOUR uplink receivers. And FOUR transponders, but the two UHF uplinks at 9600 baud are kept turned off to save power. In fact it is the default ON of these extra two 9600 baud systems that cause PCSAT to be power negative and therefore only be useable twice a year in Full sun. We wont make that mistake again... Bob, WB4APR > -----Original Message----- > From: aprssig-bounces(a)lists.tapr.org > [mailto:[email protected]] On Behalf Of > Francisco Rogerio Fontenele Aragão > Sent: Wednesday, February 13, 2008 5:50 PM > To: aprssig(a)lists.tapr.org > Subject: [aprssig] More than one PCSAT? > > Today PCSAT had a pass over Brasilia from 2207 UTC to 2223 > UTC but Findu showed the following log during the pass: > > > 20080213222151 : > LW5DGM]CQ,W3ADO-1*,qAo,LW4DEM-4:=3801.42S/05734.03W`73' Via > Satelite {UISS50} > 20080213222107 : > W3ADO-1]BEACON,SGATE,qAo,LW4DEM-4:T#128,155,156,065,208,214,00 > 111111,0011,1 > 20080213222022 : LW5DGM]CQ,W3ADO-1*,qAo,LW4DEM-4::EMAIL > :[email protected] > 20080213221938 : LW5DGM]CQ,W3ADO-1*,qAo,LW4DEM-4::LW4DEM > :Hola Jorge Saludos..... > 20080213221908 : W3ADO-1]APRS4,qAo,LW4DEM-4:Default LT4 > 20080213221907 : > W3ADO-1]BEACON,SGATE,qAo,LW4DEM-4:T#126,132,140,143,134,214,00 > 111111,0001,1 > 20080213221900 : > N9FLX]APRX46,N9AMN-2*,WIDE3-2,qAo,WB9TLH-12:;PCSAT-11 > *131309z0000.00N/00000.00W/ > 20080213221847 : W3ADO-1]APRS3,qAo,LW4DEM-4:Default LT3 > 20080213221742 : N9FLX]APRX46,TCPIP*,qAO,WB8NUT:;PCSAT-11 > *131309z0000.00N/00000.00W/ > 20080213221734 : > LW5DGM]CQ,W3ADO-1*,qAo,LW4DEM-4::BLNQSL1/1:W3ADO-1{UISS50} > 20080213221707 : > W3ADO-1]BEACON,SGATE,qAo,LW4DEM-4:T#124,156,157,073,209,214,00 > 111111,0011,1 > 20080213221704 : > LW5DGM]CQ,W3ADO-1*,qAo,LW4DEM-4:=3801.42S/05734.03W`73' Via > Satelite {UISS50} > 20080213221413 : > PCSAT-11]BEACON,SGATE,qAR,KC8OBZ-2:T#587,135,134,096,128,214,0 > 0111111,1110,1 > 20080213221113 : > N9FLX]APRX46,N9AMN-2*,WIDE3-2,qAo,WB9TLH-12:;PCSAT-11 > *131309z0000.00N/00000.00W/ > 20080213221111 : > PCSAT-11]BEACON,SGATE,qAR,KC8OBZ-2:T#586,137,139,138,123,214,0 > 0111111,1101,1 > 20080213220946 : > PCSAT-11]BEACON,SGATE,qAo,9Z4GFB-7:T#594,137,139,138,123,214,0 > 0111111,1101,1 > 20080213220855 : > PCSAT-11]BEACON,SGATE,qAR,KC8OBZ-2:T#585,142,052,095,063,214,0 > 0111111,1100,1 > 20080213220840 : PCSAT-11]APRS4,qAR,KC8OBZ-2::BLN4PCSAT:In > View now. QSY 145.825 for QSO. > 20080213220758 : PCSAT-11]BEACON,SGATE,qAo,WP4YF:]131456z reset wb4apr > > How can one understand the beacons of PCSAT-11 digipeated > by KC8OBZ-2 station? How about the beacons of N9FLX? > > 73, Francisco > PT2TD > Loc GH64bf (Lat 15.76020 S, Lon 47.83656 W) > -- > Francisco Rogerio F. Aragão > >

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(no subject)
by Clint Bradford 14 Feb '08

14 Feb '08

Is everyone satisfied with this exam question? E2A08 What is the primary reason for satellite users to limit their transmit ERP? A. For RF exposure safety B. Because the satellite transmitter output power is limited C. To avoid limiting the signal of the other users D. To avoid interfering with terrestrial QSOs I just find its Answer B "incomplete" ... Clint Bradford, K6LCS / KAF3359 909-241-7666

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Looking forward to a British astronaut
by andy thomas 14 Feb '08

14 Feb '08

story at: http://news.bbc.co.uk/1/hi/sci/tech/7244028.stm Not our first cosmonaut or asronaut for that matter. Who was it who said that if we Brits had invented the Walkman it would have been a polished mahogony box with a pair of war surplus headphones from a Lancaster bomber? I look forward to our polished wooden space vehicle with glass portholes and a leather Chesterfield. 73 de andy G0SFJ ___________________________________________________________ Yahoo! Answers - Got a question? Someone out there knows the answer. Try it now. http://uk.answers.yahoo.com/

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Libertad-1
by John Hackett 14 Feb '08

14 Feb '08

Hello folks, Does anyone happen to know the current status of Libertad-1 for APRS?. Yesterday the Amsat status page said ??? ... (unknown). 73 John. <la2qaa(a)amsat.org>

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Re: FCAL & Quakesat
by Mineo Wakita 14 Feb '08

14 Feb '08

We can decode QuakeSat signals as "KISS ON + RESTART" on TNC. But the sigal strength is very weak, so it's difficult to decode. (436.675MHz, 9600bps FSK, KISS) de JE9PEL, Mineo Wakita

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Re: Ham Shacks ?
by Edward Cole 14 Feb '08

14 Feb '08

When I setup my shack in our new home (one of the spare bedrooms), I built new shelves from 3/4-inch plywood to provide enough support. The radios are on a two level shelf while the computers on single level 6-foot long shelf about 8-inches high. I currently have three towers side by side and that is causing a little sag (one of the computers is headed for recycle after I pull the HD and install it in the other old tower (P3-1GHz). The two remaining towers sit either side of a riser support which takes the load. In the old house I used pressboard shelving boards and they did a real "wow"! The old CRT is gone and a 20-inch LCD display replaces it (shared by the two computers using a keyboard/mouse/monitor switch). Having a nice layout makes operating easier. Ed At 04:03 PM 2/13/2008, Dave Guimont wrote: > >The pressboard that most of the less expensive computer "desks/cabinets" use > >will not even hold a monitor on a shelf without warping...I use a computer > >desk for some of my ham stuff and the larger lowband transceivers can't go > >in the middle of the unsupported top shelf without creating a tendency for > >it to bow downward. > > > >If you have real wood...go for it! > >Exactly, Roger, I built my shelves from 3/4 plywood over 20 years >ago, sitting on a 4 X 8 cut out sheet of marine ply, sitting on a >fabricated light weight angle iron steel frame, and it would take >more than any computer or ham radio gear to bow it!! > >And I've used computers sitting alongside the gear for over twenty >years, and have had little interference except for the first two >years or so of computers. > >But I also use the best co-ax available, carefully installed premium >N connectors on everything, and I don't "bundle" the coax to the >outside...I use separate holes for every cable, 3/4 and 1 1/2 PVC, >angled to keep out the rain, and plugged with rags, even tho San >Diego is pretty temperate year around... > >Colder climes may wish to use foam insulation.... > >But I guess HT users wouldn't have to bother like that!! > > > > > > 73, Dave, WB6LLO > dguimon1(a)san.rr.com > > Disagree: I learn.... > > Pulling for P3E... > >_______________________________________________ >Sent via AMSAT-BB(a)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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Ham Shacks ?
by John W Lee 14 Feb '08

14 Feb '08

Hello out there! Anybody ever set up a satellite station or any type ham station in a computer armoire? Seems like it would be swell for limited space areas, etc. What with all the mini-radios, amps, power supplies, etc. these days, it would be pretty feasible and make a nice setup complete with computer, etc. I've been thinking of it but have not taken the plunge yet. (I have LARGE tube type amps, etc), they would not fit and if they did the shelves wouldn't hold them. 73 John K6YK

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Re: Ham Shacks
by Clint Bradford 13 Feb '08

13 Feb '08

>>...ham setup in an amoire... I mis-interpreted this the first time I read it, and my mind screamed out, "Your wife won't like ham equipment in her boudoir!!!" Oh, never mind. Immediate concerns - interference to/from computer and ham radio equipment in such a close proximity. The routing of wires - and tight turns of coax - may be problematic. A ham setup OR a computer setupm individually, GREAT. But use both at the same time in the same cabinet, and you may receive less-than-perfect signal reports. Monitors can be horrible sources of noise.... Clint Bradford, K6LCS 909-241-7666 -------------------------------------- Clint Bradford, K6LCS / KAF3359 909-241-7666 - cell

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