[amsat-bb] Status on re-activating Prospero
As a WOOMERA Vet that was on site for 13 years and been witness and supported in one way or another many Rocket Launches, I am also interested on the PROSPERO situation.. Regards, Frank H Woolfe; Dip EE,VK5KV. Radio Officer Coast Guard Port Augusta 7 Leahy Street Port Augusta, SA 5700 Ph; Hm (618) 8641 2883 Mb; 0407 873 411 Email; frankwoo...@bigpond.com ___ 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] AO-51 Pass@10:30 UTC
I swear I just heard some strange talking on the bird and something that sounded like a submarine pinging underwater. I thought I had Hunt for Red October on the boob tube or somethin. I heard myself on the downlink clear as day, really strong signal. I double checked my freqs and well there is no mistaking hearing yourself talk on the downlink of a satellite. Usually somebody is on these passes, but I got no response from several calls. Anyone ever experience anything like this? No I was not drinking or on anything. 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: ARISSat-1 (37772) decay
Hello Jim, N8OQ. Thanks for your very valuable reply. Because it has the effect of the atmosphere density, I think that the re-entry into the earth's atmosphere of ARISSat-1 becomes really earlier than April 9, 2011. I added your this reply under the following my URL, http://www.ne.jp/asahi/hamradio/je9pel/arissat5.htm Thank you. JE9PEL, Mineo Wakita ___ 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] 5 in EM55
Congrats to Tom KA6SIP for award #42 5 in em55 WA4HFN Damon For info about this award look me up on qrz.com ___ 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: AO-51 Pass@10:30 UTC
Nothing like that but I did get wiped out on an AO-51 pass by strange up and down oscillations on receive. I couldn't hear a thing over it. I later found out it was an AWAC plane flying down the coast Really weird. 73, Don -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Kevin Deane Sent: Wednesday, November 16, 2011 5:46 AM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 Pass@10:30 UTC I swear I just heard some strange talking on the bird and something that sounded like a submarine pinging underwater. I thought I had Hunt for Red October on the boob tube or somethin. I heard myself on the downlink clear as day, really strong signal. I double checked my freqs and well there is no mistaking hearing yourself talk on the downlink of a satellite. Usually somebody is on these passes, but I got no response from several calls. Anyone ever experience anything like this? No I was not drinking or on anything. 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] NASA Twitting Mars Rover Launch
RELEASE: 11-387 NASA INVITES 150 LUCKY TWITTER FOLLOWERS TO LAUNCH OF MARS ROVER WASHINGTON -- NASA has invited 150 followers of the agency's Twitter account to a two-day launch Tweetup on Nov. 23 and 25 at the agency's Kennedy Space Center in Florida. The Tweetup is expected to culminate in the launch of the Mars Science Laboratory's Curiosity rover aboard an Atlas V rocket from nearby Cape Canaveral Air Force Station. The launch window is scheduled to open at 10:25 a.m. EST on Nov. 25. Curiosity's arrival at Mars is anticipated in August 2012 near Gale Crater. During the nearly two-year prime mission, the rover will investigate whether a selected area of Mars offered environmental conditions favorable for microbial life and preserved that evidence, if it existed. Tweetup participants were selected from more than 1,050 people who registered online. They will share their Tweetup experiences with their followers through the social networking site Twitter. Participants represent the United States, Australia, Belgium, Brazil, Canada, France, Germany, Ireland, Spain and the United Kingdom. Attendees from the U.S. come from the District of Columbia and 37 states: Alabama, Arizona, California, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Washington and Wisconsin. Beginning at 11 a.m. on Wednesday, Nov. 23, NASA will broadcast a portion of the Tweetup when attendees talk with Jim Green, Planetary Science division director, and Doug McCuistion, Mars Exploration program director, both at NASA Headquarters in Washington. Engineers from NASA's Jet Propulsion Laboratory, Pasadena, Calif., where the rover was designed and built will speak, as will mission scientists. To watch the broadcast, visit: http://www.ustream.tv/channel/nasa-tweetup Participants also will tour Kennedy and Cape Canaveral, including a close-up visit to the launch pad. On launch day, they will speak with NASA Administrator Charles Bolden; Leland Melvin, NASA's assistant administrator for education; astronaut Doug Wheelock and Bill Nye the Science Guy. Reporters credentialed to cover the launch also may cover the NASA Tweetup at Kennedy's press site. Reporters interested in interviewing Tweetup attendees in advance should contact Stephanie Schierholz at 202-358-1100 or stephanie.schierh...@nasa.gov. NASA has invited its Twitter followers to attend eight previous launches: NASA's newest Earth-observing satellite, NPP; the twin GRAIL spacecraft bound for the moon; the Juno spacecraft on its way to Jupiter; and five space shuttle missions. To follow participants on Twitter as they experience the prelaunch events and Curiosity's liftoff, follow the #NASATweetup hashtag and the list of attendees at: https://twitter.com/NASATweetup/mars-curiosity JPL manages the mission. NASA's Launch Services Program at Kennedy is managing the launch. For more information about the Mars Curiosity rover, visit: http://www.nasa.gov/msl Interact with the mission via Twitter and Facebook accounts at: http://Twitter.com/MarsCuriosity http://Facebook.com/MarsCuriosity To connect with NASA on Twitter and other social networking sites, visit: http://www.nasa.gov/connect -end- Clint Bradford clintbradf...@mac.com ___ 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: ARISSat-1 (37772) decay
Hi Jim, Thanks for the update on your AMSAT Journal article. There are several people on the bb who are following this topic and are busy plotting data. Any futher thoughts you have, as we move towards January would, I am sure be of interest. 73 John G7HIA From: DeYoung James deyoung_ja...@yahoo.com To: amsat-bb amsat-bb@amsat.org Sent: Tuesday, 15 November, 2011 17:29:31 Subject: [amsat-bb] ARISSat-1 (37772) decay Greetings, First, thank you Mineo for reading the AMSAT Journal and making several of my papers available on your web site. My AMSAT Journal paper published in the March/April 2011 issue is actually still fairly valid for the scenarios shown in the paper. The solar flux has turned out to be somewhat higher than was used/predicted in the paper. This has caused the atmospheric densities to be higher which results in higher decay rates. When I wrote the paper I had this nagging feeling that stopping the release height scenarios at 370-km was not going to be high enough. We are very fortunate that the ISS was boosted to such a height before release of ARISSat-1 and not after release! There is a valuable lesson, I think, to be made with respect to predicting satellite decay dates far into the future. The future state of the atmosphere, i.e. the atmospheric density that the satellite will pass through is poorly predictable in the long-term, say starting greater than a week or two into the future. Predictions of satellite decay dates months in the future should be evaluated with the understanding that your date of prediction errors may be large. The errors are due to the future uncertainties of the orbital path which grow quickly with time in a prediction. The atmospheric density is not the only source of error. Your orbit model, the integrator, and the accounting of the gravitational and drag forces among others will affect your results. Predictions of satellite decay dates are not do-and-forget. The general process is to make a prediction, get new measured observations of the height in the future, and at some point re-do your prediction when the errors become significant to you. With that all said here is my current prediction using the same tools used in the AMSAT J. paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772) will happen nominally on 2012 January 30th with a 10% rule-of-thumb error allowance of 18 days around this date. The errors may be larger than the rule-of-thumb indicates! Jim, N8OQ ___ 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: ARISSat-1 (37772) decay
Hello Everybody, I totally agree with you James... the process is a continuous evolution. I did my prediction on October 6th for the Chicken Little Competition and my date was January 23rd 2012. It surprisingly agrees with your prediction done almost one month later, this make me think that my assumptions were right, up to now at least. 73s Fabio IW8QKU/5 Hi Jim, Thanks for the update on your AMSAT Journal article. There are several people on the bb who are following this topic and are busy plotting data. Any futher thoughts you have, as we move towards January would, I am sure be of interest. 73 John G7HIA From: DeYoung James deyoung_ja...@yahoo.com To: amsat-bb amsat-bb@amsat.org Sent: Tuesday, 15 November, 2011 17:29:31 Subject: [amsat-bb] ARISSat-1 (37772) decay Greetings, First, thank you Mineo for reading the AMSAT Journal and making several of my papers available on your web site. My AMSAT Journal paper published in the March/April 2011 issue is actually still fairly valid for the scenarios shown in the paper. The solar flux has turned out to be somewhat higher than was used/predicted in the paper. This has caused the atmospheric densities to be higher which results in higher decay rates. When I wrote the paper I had this nagging feeling that stopping the release height scenarios at 370-km was not going to be high enough. We are very fortunate that the ISS was boosted to such a height before release of ARISSat-1 and not after release! There is a valuable lesson, I think, to be made with respect to predicting satellite decay dates far into the future. The future state of the atmosphere, i.e. the atmospheric density that the satellite will pass through is poorly predictable in the long-term, say starting greater than a week or two into the future. Predictions of satellite decay dates months in the future should be evaluated with the understanding that your date of prediction errors may be large. The errors are due to the future uncertainties of the orbital path which grow quickly with time in a prediction. The atmospheric density is not the only source of error. Your orbit model, the integrator, and the accounting of the gravitational and drag forces among others will affect your results. Predictions of satellite decay dates are not do-and-forget. The general process is to make a prediction, get new measured observations of the height in the future, and at some point re-do your prediction when the errors become significant to you. With that all said here is my current prediction using the same tools used in the AMSAT J. paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772) will happen nominally on 2012 January 30th with a 10% rule-of-thumb error allowance of 18 days around this date. The errors may be larger than the rule-of-thumb indicates! Jim, N8OQ ___ 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] AO-10?
Just wondering if anyone has tried listening for old ao-10. Alway's hoping she will spring back to life... chad kg0mw ___ 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
