[amsat-bb] ISS
Figures I miss the pass everyone is on. Hope to catch someone tonight or this morning. Mostly beacons on the west coast, however I did get a human this morning... Kevin KF7MYK ___ Sent via AMSAT-BB@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
[amsat-bb] Re: ISS Keps
Tim, The font of all Keplerian knowledge, except for some of the satellites which do not have their's published for security or other matters, is Space Track. Space Track feeds Celestrak. There can be a few hours lag as the updates propogate through the systems, and software updates. Usually no more than 6-8m hours. Both SATPC32 and HRD used Celestrak Keps, but they can, and do, use the NASA.ALL Keps. It depends on how you have them configured. No mystery, really. 73s, Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Tim Goodrich Sent: Thursday, October 06, 2011 2:45 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: ISS Keps I think there may be something more to this. You're saying celestrak keps are as correct and up to date as the online tracker. However, both HRD and SatPC were wrong for me last night and I know HRD uses celestrak keps, which I know were less than 12 hours old, if not only a couple hours old. If it helps to decode this mystery, I know my friend running NOVA had the correct info for the ISS pass last night. Tim K6TW -Original Message- From: Alan P. Biddle [mailto:apbid...@united.net] Sent: Wednesday, October 05, 2011 2:00 PM To: 'Kevin Deane'; amsat-bb@amsat.org Subject: [amsat-bb] Re: ISS Keps Kevin, The NASA.ALL Keps are issued and updated weekly, normally Friday, as they have been for literally decades. The on line tracker widget gets Keps directly, and so will be as up to date as Celestrak and Space Track. Two different systems, and purposes, which is why there is a difference. You will see a similar situation with ARISSat-1 as it slowly descends. Which is a good chance to get another plug in for the Chicken Little Contest. 73s, Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Kevin Deane Sent: Wednesday, October 05, 2011 3:33 PM To: amsat-bb@amsat.org Subject: [amsat-bb] ISS Keps So here we are again, Amsat shows the ISS in the right spot but the keps it gives out for automatic updates are around 6 minutes off again. I know about the boosting and why they are off, just dont ubderstand WHY they are good on the online tracker and not anything else? Kevin KF7MYK ___ Sent via AMSAT-BB@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@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@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
[amsat-bb] Re: Good URL for updating keps HRD
Kevin, If you want the most recently available Keps for the ISS, or anything else not classified, it is worth getting a free account at Space Track. www.space-track.org They feed pretty much everything else, and update 3-5 times a day. More if needed. I don't recall the last time the Celestrak Keps were off, but if more current Keps exist, that is where to go. You can cut and paste them into AMATEUR.TXT or other file as needed. I do that with new launches, and in a real sense, each ISS boost is a new launch. 73s, Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Kevin Deane Sent: Thursday, October 06, 2011 6:43 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Good URL for updating keps HRD Does someone have a link for the good ISS keps again? I think it was posted but I spaced it. Not one of these: celstrck.com or amsat.org both bad. Thanks! Kevin KF7MYK ___ Sent via AMSAT-BB@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@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
[amsat-bb] 5500 rotor problem
Starting to put my satellite system back on the air. Now having another rotor problem. I think what happened is that after Hurricane Irene passed by, everything was working. Later that morning a surprisingly strong wind gust after Irene passed by blew my sat array over. I was unaware of this and when I tried to work a sat I had a very weak signal. I went outside to check the antenna system and found it laying on the ground. So what I think happened is that the rotor was trying to turn while the antenna was on the ground and burned out something in the rotor. It is not a cable problem, it is definitely in the azimuth rotor, elevation works fine. I swap cables and this showed the problem is in the az rotor only. Anyone have this same problem? I'm going to take the rotor apart this weekend and would like some ideas before I start. Any electrical test through the cable from inside the shack to determine the problem would be much appreciated :-) 73 Jeff kb2m ___ Sent via AMSAT-BB@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
[amsat-bb] G5500 Elevation Rotator Short Circuit?
I wonder if this is a known fault. Recently the fuse on my G5500 blew. The problem seems to be a short on one of the motor circuits. Checking the DC resistance at the control end, the resistance of one winding is 1.2 ohms, whereas all the other windings are 4.6 ohms. I could understand a motor burning out and going open circuit, but a short circuit seems less likely. I'm wondering if it could be a short on the cable at the rotator end, where it is subject to much bending. There's about 15 metres of cable. Any thoughts would be much appreciated. Unfortunately, at the present time I'm not able to inspect the rotator. It's stuck in the horizontal position, so I will still be able to use the antenna for low elevation passes. 73 Clive G3CWV Hitchin, North Hertfordshire, UK ___ Sent via AMSAT-BB@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
[amsat-bb] CO6CBF/p FL02 in LotW now
Hello Hams � Thanks very much to all who worked me during my portable operation in FL02. � Contacts are now in LotW. Please, upload the contacts using only my call sign without /P. � Thanks again � 73! � Hector, CO6CBF � *** Genius is one per cent inspiration, and ninety-nine per cent perspiration. -- Thomas A. Edison *** --- Free the Cuban Five! http://www.injusticia.cubaweb.cu/, http://www.antiterroristas.cu/ Participe en Universidad 2012, del 13 al 17 de febrero de 2012. Habana, Cuba. http://www.congresouniversidad.cu/ Consulte la Enciclopedia Colaborativa Cubana: http://www.ecured.cu/___ Sent via AMSAT-BB@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
[amsat-bb] 2011 AMSAT Space Symposium
People -* In one month*, AMSAT will hold the 2011 Space Symposium and Annual Meeting. The venue is the Wyndham hotel in San Jose, CA. Please do not hesitate to make your hotel reservations. Information can be found on the AMSAT website along with the registration form for the meeting and banquet. -- 73- Martha ___ Sent via AMSAT-BB@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
[amsat-bb] Re: G5500 Elevation Rotator Short Circuit?
The common failure of the motor windings is caused by heat which causes the enamel coated wire to breakdown. When the enamel breaks down an inner winding short results. I have successfully rewound motor windings on these rotators just to say it could be done, but it takes some work (not recommended). I have never seen one of these motors with an open winding. The failure mode on the 8 that I have repaired were always enamel insulation breakdown as a result of overheating. Tim - N8DEU Sent from my HTC Tilt 2, a Windows® Mobile phone -Original Message- From: Clive Wallis amsat...@g3cwv.co.uk Sent: Friday, October 07, 2011 11:35 AM To: amsat amsat-bb@amsat.org Subject: [amsat-bb] G5500 Elevation Rotator Short Circuit? I wonder if this is a known fault. Recently the fuse on my G5500 blew. The problem seems to be a short on one of the motor circuits. Checking the DC resistance at the control end, the resistance of one winding is 1.2 ohms, whereas all the other windings are 4.6 ohms. I could understand a motor burning out and going open circuit, but a short circuit seems less likely. I'm wondering if it could be a short on the cable at the rotator end, where it is subject to much bending. There's about 15 metres of cable. Any thoughts would be much appreciated. Unfortunately, at the present time I'm not able to inspect the rotator. It's stuck in the horizontal position, so I will still be able to use the antenna for low elevation passes. 73 Clive G3CWV Hitchin, North Hertfordshire, UK ___ Sent via AMSAT-BB@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@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
[amsat-bb] Mars Science Laboratory Enclosed In Aeroshell
http://www.nasa.gov/mission_pages/msl/news/msl20111005.html http://www.nasa.gov/mission_pages/msl/multimedia/gallery/pia14755.html http://www.nasa.gov/mission_pages/msl/multimedia/gallery/pia14756.html http://www.nasa.gov/mission_pages/msl/multimedia/gallery/pia14757.html http://www.nasa.gov/mission_pages/msl/multimedia/gallery/pia14758.html More pictures at: http://www.nasa.gov/mission_pages/msl/multimedia/gallery/gallery-index.html 73s Bernhard VA6BMJ @ DO33FL ___ Sent via AMSAT-BB@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
[amsat-bb] Its not your Keps
Hi Kevin, I doubt the problem is your keps if you have an up to date set from any of the sources suggested. You might want to check the following: Your PC clock may not have the correct time There may be something in an initialisation routine that has set a default time zone, or an offset from UTC This can be tricky with some PC's and software. You might have to set your PC clock to UTC. Entering your lat/long, East or West of the Grenwich (0) meridian. There is no convention on this some programs want a plus sign ahead of your longitude some a minus. Those are the things that have caught me out in the past. BTW - dont expect agreement to the second between different tracking software. Its only a prediction and not all programs use the exact same algorithms to do the calcs. Good Luck 73 John G7HIA ___ Sent via AMSAT-BB@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
[amsat-bb] Office Closed
The AMSAT Office will be closed on Monday, October 10th in observance of Columbus Day. We will reopen on the 11th -- 73- Martha ___ Sent via AMSAT-BB@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
[amsat-bb] ANSR Flight 64
All, the Arizona Near Space research group will be launching a high altitude balloon with a ham radio payload on Saturday at 0900 mst (1600ut) from Maricopa, AZ, about 30 miles south of Phoenix. the balloon will be carrying a cross band repeater and APRS digi and an SSTV system. Expected burst altitude is about 90,000+ feet. this should give a foot print of about 450ish miles at max altitude. If it stays in the central AZ area, this would reach out into SoCal, Western New Mexico, southern Utah Nevada and northern Sonora I'll be trying to work the Cross band repeater and if time allows the APRS digi. Detail including frequencies and such are at www.ansr.org. Kevin KF7MYK, if it get high enough, you should be well in range. This sounds like something you';d be interested in. Listen for my call. 73 Rick K7TEJ ___ Sent via AMSAT-BB@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
[amsat-bb] Re: ANSR Flight 64
Hi Rick! the Arizona Near Space research group will be launching a high altitude balloon with a ham radio payload on Saturday at 0900 mst (1600ut) from Maricopa, AZ, about 30 miles south of Phoenix. the balloon will be carrying a cross band repeater and APRS digi and an SSTV system. Expected burst altitude is about 90,000+ feet. this should give a foot print of about 450ish miles at max altitude. If it stays in the central AZ area, this would reach out into SoCal, Western New Mexico, southern Utah Nevada and northern Sonora I'll be trying to work the Cross band repeater and if time allows the APRS digi. Detail including frequencies and such are at www.ansr.org. Kevin KF7MYK, if it get high enough, you should be well in range. This sounds like something you';d be interested in. Listen for my call. If Kevin isn't in southern Nevada, he might not be able to hear this one. A few years ago, I put together a simple web page that included coverage maps based on the balloon being over the area south of Phoenix for those balloon flights. It's at: http://balloon.wd9ewk.net/ If I'm not terribly busy in the morning, I may give that a listen. In the past, once those balloons are up a bit, a VX-2R (1W) and a duckie in Phoenix was more than enough to work the cross-band repeater. Just like working the FM satellites, except you won't have to deal with Doppler. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ ___ Sent via AMSAT-BB@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
[amsat-bb] Re: 5500 rotor problem
Ok I started working the problem tonight. I would first like to thank, Al Wa4sca, Stan W1le, and Jeff N3qo, for some ideas on what the problem might be. What I found so far is an open between 4 5 and 6. Any combination of the three is open. So I'm assuming I burned out the motor windings in the azimuth rotor to cause an open. I'm also assuming as the rotor is less than 3 years old that it doesn't have a fused link? I went through my parts bin and found a working Yaesu G-450 rotor. I wonder if the 450 and the 5500 azimuth rotor use the same motor, did anyone try this? 73 Jeff kb2m On Fri, Oct 7, 2011 at 7:09 AM, Jeff KB2M k...@comcast.net wrote: Starting to put my satellite system back on the air. Now having another rotor problem. I think what happened is that after Hurricane Irene passed by, everything was working. Later that morning a surprisingly strong wind gust after Irene passed by blew my sat array over. I was unaware of this and when I tried to work a sat I had a very weak signal. I went outside to check the antenna system and found it laying on the ground. So what I think happened is that the rotor was trying to turn while the antenna was on the ground and burned out something in the rotor. It is not a cable problem, it is definitely in the azimuth rotor, elevation works fine. I swap cables and this showed the problem is in the az rotor only. Anyone have this same problem? I'm going to take the rotor apart this weekend and would like some ideas before I start. Any electrical test through the cable from inside the shack to determine the problem would be much appreciated :-) 73 Jeff kb2m ___ Sent via AMSAT-BB@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@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
[amsat-bb] Re: 5500 rotor problem
My 5500 has had a 450 motor in it for about 8 years :) It was cheaper to buy a used rotor than the motor from yaesu parts. 73, Drew KO4MA Sent from my iPhone On Oct 7, 2011, at 8:34 PM, Jeff KB2M k...@comcast.net wrote: Ok I started working the problem tonight. I would first like to thank, Al Wa4sca, Stan W1le, and Jeff N3qo, for some ideas on what the problem might be. What I found so far is an open between 4 5 and 6. Any combination of the three is open. So I'm assuming I burned out the motor windings in the azimuth rotor to cause an open. I'm also assuming as the rotor is less than 3 years old that it doesn't have a fused link? I went through my parts bin and found a working Yaesu G-450 rotor. I wonder if the 450 and the 5500 azimuth rotor use the same motor, did anyone try this? 73 Jeff kb2m On Fri, Oct 7, 2011 at 7:09 AM, Jeff KB2M k...@comcast.net wrote: Starting to put my satellite system back on the air. Now having another rotor problem. I think what happened is that after Hurricane Irene passed by, everything was working. Later that morning a surprisingly strong wind gust after Irene passed by blew my sat array over. I was unaware of this and when I tried to work a sat I had a very weak signal. I went outside to check the antenna system and found it laying on the ground. So what I think happened is that the rotor was trying to turn while the antenna was on the ground and burned out something in the rotor. It is not a cable problem, it is definitely in the azimuth rotor, elevation works fine. I swap cables and this showed the problem is in the az rotor only. Anyone have this same problem? I'm going to take the rotor apart this weekend and would like some ideas before I start. Any electrical test through the cable from inside the shack to determine the problem would be much appreciated :-) 73 Jeff kb2m ___ Sent via AMSAT-BB@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@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@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
[amsat-bb] Arissat-1 for educators paper// 11 days till Arissat-1 returns
Hi all! A friend of mine is a schoolteacher who is planning on using Arissat in a classroom presentation. I wrote a paper detailing how to install/configure Orbitron and Nova for Windows demo (for eclipse prediction). Also included are some helpful setup procedures for field operations. Anyone who would like a copy of this please let me know. 73 de Norm n3ykf ___ Sent via AMSAT-BB@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
