[amsat-bb] emailing Amsat
Does anyone know the email address to send correspondence to Amsat? When I try using the form on their site it tells me their is an error..? ___ 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: emailing Amsat
Zach, Call?? Send it to mar...@amsat.org Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of zach hillerson Sent: Sunday, March 13, 2011 8:22 AM To: amsat-bb@amsat.org Subject: [amsat-bb] emailing Amsat Does anyone know the email address to send correspondence to Amsat? When I try using the form on their site it tells me their is an error..? ___ 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: Is it 100% impossible to work a satellite below thehorizon?
On 3/12/2011 7:25 PM, Bill Dzurilla wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? My memory might be a little fuzzy here. There was an article in the AMSAT Journal back in the early 90's where G3IOR described his contact from the UK into VK/ZL using RS-12. As others have mentioned in this thread, RS-12 using 15 and 10 meters for uplink and downlink, below the horizon contacts were possible. I was able to work KH6 that way from New York. I also worked many European countries out of normal expected range. I seriously doubt that satellites using 2 meters and higher frequencies for uplink/downlink would show much (if any) below the horizon capability. Bob NA2X AMSAT LM #51 since 1974 ___ 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: Is it 100% impossible to work a satellite below thehorizon?
I have heard satellite paths extended by Aurora many times. It has very distinctive sound. 73, Joe kk0sd -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of n...@yahoo.com Sent: Sunday, March 13, 2011 9:13 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Is it 100% impossible to work a satellite below thehorizon? On 3/12/2011 7:25 PM, Bill Dzurilla wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? My memory might be a little fuzzy here. There was an article in the AMSAT Journal back in the early 90's where G3IOR described his contact from the UK into VK/ZL using RS-12. As others have mentioned in this thread, RS-12 using 15 and 10 meters for uplink and downlink, below the horizon contacts were possible. I was able to work KH6 that way from New York. I also worked many European countries out of normal expected range. I seriously doubt that satellites using 2 meters and higher frequencies for uplink/downlink would show much (if any) below the horizon capability. Bob NA2X AMSAT LM #51 since 1974 ___ 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: Is it 100% impossible to work a satellite below thehorizon?
Drew, I believe your reference was to N4ZC. There are some old (2002) posts on amsat-bb about his exploits: http://www.amsat.org/amsat/archive/amsat-bb/200203/msg5.html http://www.amsat.org/amsat/archive/amsat-bb/200202/msg00708.html http://www.amsat.org/amsat/archive/amsat-bb/200202/msg00712.html 73, Jerry, K5OE On 3/12/2011 7:25 PM, Bill Dzurilla wrote: I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? It was relatively commonplace with RS-12 on Mode K, 15m up, 10m down. There was one guy in North Carolina I think that worked dxcc on RS-12/13. He was my first satellite QSO in 1992 or so, and was always on. I can't remember the call, but it was a 1x2 I think. I imagine it would be at least possible on other birds and higher bands with strong tropo. Jerry, KK5YY told me about doing that on AO-27 or UO-14 from Alaska over the ocean. I've not experienced it though. 73, Drew KO4MA ___ 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 Digipeaer over Japan
Toyo san, A few more ideas. It is easy to manually estimate ISS pass times every day once you have heard a pass. See: http://aprs.org/MobileLEOtracking.html 1) ISS over Japan today is between about 0830 to 1830 JST. 2) When you hear the first pass, then you will have additional passes every 91 minutes or so that day. 3) Each day a given GOOD pass is 23 minutes later. 4) But overall-long-term pattern is moving earlier every other day by 51 minutes. 5) So in one week from now, the time window will be 0600 to 1600 6) The pass pattern is about the same. First 2 passes peak to the SE, then NW. Then a low northern pass, then the last two passes are NE and then SW. You can get EXACT pass times from http://heavens-above.com and select a city. However, this web page does not show the 1 or 2 low passes each day below 10 degrees elevation. The problem with using the ISS digipeater is that the survivors in the devistated area do not know the frequency (145.825). One way to solve this is to look for opportunity for someone to take a portable digipeater on an airplane over devistated area. The new TH-D72 HT can digipeat now! So have someone with a D72 catch a ride in an aircraft one day. The D72 can BEACON on 144.64 a MESSAGE BULLETIN with info about the ISS digipeater and the time-window. WHile it is aloft, it can also act as a digipeater on Japanese APRS channel 144.64 and can also capture a list of any APRS stations or mobiles on the air. The short bulletins might say something like this: TO: BLN1 MSG: ISS Digi on 145.825 between 0830 to 1830 TO: BLN2 MSG: Passes are 6 min long every 91 minutes TO: BLN3 MSG: Every day, passes are 23 minutes later TO: BLN4 MSG: Time window moves EARLIER 51m every 2 days Keep bulletins to under 45 characters to make sure that every radio display can see the full bulletin (D7 screen limit). But in small area like Japan, I think it might be easier just to try to drive APRS mobiles (acting as digipeaters) to nearby hill tops on 144.64 normal APRS Japanese Frequency and keep everyone on same frequency without confusion. Bob, WB4APR ___ 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: AMSAT-BB Digest, Vol 6, Issue 151
- Original Message - From: amsat-bb-requ...@amsat.org To: amsat-bb@amsat.org Sent: Saturday, March 12, 2011 10:56 PM Subject: AMSAT-BB Digest, Vol 6, Issue 151 LOUIS, KD5GM in EL29kq Bill, I have on several occasions, while I am listening to my own signals (in CW) on the SAT's AO-07, FO-29 and VO-52, when they are LOS to the North of the US and have copied the signals down to -6 degrees on nights that there have Aurora alerts posted from several reflectors that I subscribe to. Most of the time my Northern LOS for these birds is 1 to 2 degrees when there are no alerts. Certainly no expert on this phenomenon, but I believe that the signals are enhanced beyond the normal range during the enhancement conditions. 73, Louis CW, The original digital mode AMSAT #37061: FIST #3606 - Original Message - From: Bill Dzurilla billdz@yahoo.com To: amsat-bb@amsat.org Sent: Sunday, March 13, 2011 12:25 AM Subject: [amsat-bb] Is it 100% impossible to work a satellite below thehorizon? I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? 73, Bill NZ5N ___ 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] 2M1EUB/P QRV SCOTLAND 20/3/11
Hi group opperations from scotland will begin this year 20/march ,depending on WX as there is plenty of snow about there!...ill be qrv for one week. Ill be opperating from the van, so could be interesting as ive spent all winter seting it up ,hope to be able to be on the mountains rather than below them...fun starts from io87rj E.Scotland and arround that area...more info qrz.com . Ill also be posting later in the year other interesting opperations from western islands of scotland,including sky,Harris and Lewis ...some rare islands to sat opps! dates will follow later in the year .73 de paul 2E1EUB /2M1EUB/P ___ 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: Is it 100% impossible to work a satellite below thehorizon?
Hi Bill, NZ5N When AO40 was alive and well I experimented many QSO's with several stations in USA when the elevation of AO40 for me in JN70ES was already -2 or -3 degrees belove my free horizon using InstantTrack for tracking The AO40 downlinh was obviously in 2401.300 MHz but my uplink was in 70 cm or 23 cm and my negative elevation was monitored by those stations in USA using all the same set of keplerian elements but with different tracking programs and all gives the same results that the elevation for me was negative. To explain this uncommon below the horizon propagation anomaly I believe that is my QTH location that play an important rule because my building is located only 100 meters from the beach and the antennas are 50 meters above the sea level and so it is possible that propably in presence of particular temperature and humidity and pressure conditions a duct similar to a wave guide is developed over the sea so that my signals and the satellite signals are traveling into the duct for many miles allowing the QSO to be made with AO40 belove my horizon. Another station i8KCL in my QTH wich home is many undred meters behind my back and more high them me over the sea level he was never able to receive AO40 with -2 or -3 degrees belove the horizon or made a two way QSO with the above negative elevation because probably owing of his home altitude he was not in condition to enter his signals into the suspected duct. I do not remember the call letter of the many stations in USA experimenting with me the above propagation anomaly but if some of them are reading this AMSAT-BB please drop a line in responce. Best 73 de i8CVS Domenico - Original Message - From: Bill Dzurilla billdz@yahoo.com To: amsat-bb@amsat.org Sent: Sunday, March 13, 2011 1:25 AM Subject: [amsat-bb] Is it 100% impossible to work a satellite below thehorizon? I was giving a presentation at our club meeting called Working DX on the Satellites and afterwards someone had a good question: is it at all possible that tropo, skip, or other form of enhanced propagation can enable a contact via a satellite below the horizon? It has never happened to me. Has it ever happened? 73, Bill NZ5N ___ 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] Fwd: Next HV Satcom Net date!
*Hi all, Am sorry that Lee didn't include my article in the ANS Weekly Bullitin (Week of 3/13) 73,.Stu (WA2BSS) * -- Forwarded message -- From: Stuart Balanger wa2...@gmail.com Date: Thu, Mar 10, 2011 at 6:06 AM Subject: Next HV Satcom Net date! To: ans-edi...@amsat.org *The next HV satcomgroup net is Thursday March 17 (St. Patties day); at 8PM (EDT; UTC4) on the 146.97 MHz Repeater with an Echolink node of N2EYH-L the Mt.Beacon ARC Hamfest Sunday April 10. More info (Satcom): www.hvsatcom.org More info (Mt.Beacon ARC) : www.wr2abb.org/home/ 73,.Stu (WA2BSS) * ___ 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 Digipeaer over Japan
At 07:28 AM 3/13/2011, Bob Bruninga wrote: Toyo san, A few more ideas. It is easy to manually estimate ISS pass times every day once you have heard a pass. See: http://aprs.org/MobileLEOtracking.html 1) ISS over Japan today is between about 0830 to 1830 JST. 2) When you hear the first pass, then you will have additional passes every 91 minutes or so that day. 3) Each day a given GOOD pass is 23 minutes later. 4) But overall-long-term pattern is moving earlier every other day by 51 minutes. 5) So in one week from now, the time window will be 0600 to 1600 6) The pass pattern is about the same. First 2 passes peak to the SE, then NW. Then a low northern pass, then the last two passes are NE and then SW. You can get EXACT pass times from http://heavens-above.com and select a city. However, this web page does not show the 1 or 2 low passes each day below 10 degrees elevation. The problem with using the ISS digipeater is that the survivors in the devistated area do not know the frequency (145.825). One way to solve this is to look for opportunity for someone to take a portable digipeater on an airplane over devistated area. The new TH-D72 HT can digipeat now! So have someone with a D72 catch a ride in an aircraft one day. The D72 can BEACON on 144.64 a MESSAGE BULLETIN with info about the ISS digipeater and the time-window. WHile it is aloft, it can also act as a digipeater on Japanese APRS channel 144.64 and can also capture a list of any APRS stations or mobiles on the air. The short bulletins might say something like this: TO: BLN1 MSG: ISS Digi on 145.825 between 0830 to 1830 TO: BLN2 MSG: Passes are 6 min long every 91 minutes TO: BLN3 MSG: Every day, passes are 23 minutes later TO: BLN4 MSG: Time window moves EARLIER 51m every 2 days Keep bulletins to under 45 characters to make sure that every radio display can see the full bulletin (D7 screen limit). All good suggestions except the last one. I think the road system is devastated as all the relief work has been by air in the severest hit areas. ~ Ed , KL7UW But in small area like Japan, I think it might be easier just to try to drive APRS mobiles (acting as digipeaters) to nearby hill tops on 144.64 normal APRS Japanese Frequency and keep everyone on same frequency without confusion. Bob, WB4APR ___ 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 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubus...@hotmail.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: Anyone using PacsatTools for Linux?
Hi Eric On 2011-03-13 00:28, Eric Christensen wrote: Anyone using PacsatTools for Linux? I just installed the software but can't quite figure out what's going on with it. Thanks. We use PacsatTools at OZ7SAT. It works best if you also use PB/PG for Linux (http://fern.dk/?PB%2FPG) We mostly use pbdir and occasionally pfhadd and phs but rarely the rest. The README file should tell the full story. Best 73 de Bent/OZ6BL ___ 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: Want to see the ND9M/MM QTH?
Wow ! not sure I would like to be running around on that heli deck with an Arrow and my HT !! bet I'd walk right off the edge..Jim defiantly has Sea Legs !! Thanks for the pixs Patrick -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Patrick STODDARD (WD9EWK/VA7EWK) Sent: Saturday, March 12, 2011 9:59 PM To: amsat-bb@amsat.org Subject: [amsat-bb] Want to see the ND9M/MM QTH? Hi! While I was just in California recently, I drove to Oceanside - along the coast north of San Diego, next to the huge Marine Corps Base Camp Pendleton. I was hoping to see the USNS Sgt. William R. Button, the ship Jim ND9M has been on and operating from lately. After some driving around, I was able to see his ship offshore on Friday morning before I left the San Diego area. I had seen photos of the ship on the Internet, so I had an idea what to look for. After seeing an e-mail from ND9M on Friday, I considered myself lucky to see his ship. It had gone out to deeper water, in advance of the tsunami from the recent earthquake in Japan. It had come back to its anchorage by the time I went out there. I was able to see the ship, and took several photos of it in the 1800-1900 UTC (1000-1100 local time) hour. I posted a couple of those photos at: http://www.qsl.net/wd9ewk/pics/nd9m/ The first photo was taken at the north end of Oceanside Harbor, very close to Camp Pendleton. The second photo was taken about 1/2 mile (almost 1km) south of that location, on the beach. The helicopter deck on the rear of the ship was visible, which is where Jim has been operating from. These two photos are at a lower resolution than the original 7-megapixel photos, so they don't take much time to download. If anyone wants to see the originals, please e-mail me directly and I'll send them to you. More information about Jim's ship is available at (among other places): http://www.msc.navy.mil/inventory/ships.asp?ship=21 http://en.wikipedia.org/wiki/Maritime_Prepositioning_ship#2nd_Lieutenant_Joh n_P._Bobo_Class 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 ___ 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: FT-8800R new toy
2011/3/13 Bob- W7LRD w7...@comcast.net Not wanting to reinvent the wheel. Anyone using the FT-8800R mobile for satellites have any hints or sugestions, antennas etc. Email direct-thanks. Hi, I am using FT-8900R (practically same as '8800 plus 6m and 10m) for working satellites from my car. My antenna is a Diamond NR770 dualband whip on the trunk lid of my car. While this setup is ok for usual mobile FM operation and APRS, it is probably not optimal for satellite ops. I have got better results on satellites with a dual band mag whip on the roof the my car. Especially when the satellite is below ~60 degrees it can be reached easily when I can hear it (thanks to 50 watts on the uplink). When the sat is higher than that the whip is not so good. I have been working mainly on AO-51 and I have preprogrammed the uplink/downlink channel pairs with different doppler values so it is easy to follow the sweet spot while the sat first approaches (above the nominal frequency on downlink) and the starts to fly away (below the nominal freq). Programming goes easily with FTB8900 software by G4HFQ. As same channel pairs are available both on the left and right side of the radio, I usually transmit and listen on the left side of the radio and try to listen my own signal on downlink with the right side of the rig. With a single mobile whip the sensitivity of the downlink rx is usually not good enough during the transmission. This might be better with separate antennasa for uplink and downlink. I have planned to use my Arrow yagi with FT-8900R. As the Arrow's diplexer is rated only max 10 watts, I bought 100w rated separate diplexer to be used with '8900 instead. But I have not tried this combination yet. 73 de Ari OH3KAV / OH7KA Tampere, Finland (grid: KP11) ___ 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: FT-8800R new toy
For sat ops mobile, you will get the most success out of a 1/4 wave antenna on a good ground plane. It will give you a hemispherical emission pattern so that any direction in LOS is equally covered. Gregg W5GGW Sent from my iPhone On Mar 13, 2011, at 4:28 PM, Ari Kosonen ari.koso...@gmail.com wrote: 2011/3/13 Bob- W7LRD w7...@comcast.net Not wanting to reinvent the wheel. Anyone using the FT-8800R mobile for satellites have any hints or sugestions, antennas etc. Email direct-thanks. Hi, I am using FT-8900R (practically same as '8800 plus 6m and 10m) for working satellites from my car. My antenna is a Diamond NR770 dualband whip on the trunk lid of my car. While this setup is ok for usual mobile FM operation and APRS, it is probably not optimal for satellite ops. I have got better results on satellites with a dual band mag whip on the roof the my car. Especially when the satellite is below ~60 degrees it can be reached easily when I can hear it (thanks to 50 watts on the uplink). When the sat is higher than that the whip is not so good. I have been working mainly on AO-51 and I have preprogrammed the uplink/downlink channel pairs with different doppler values so it is easy to follow the sweet spot while the sat first approaches (above the nominal frequency on downlink) and the starts to fly away (below the nominal freq). Programming goes easily with FTB8900 software by G4HFQ. As same channel pairs are available both on the left and right side of the radio, I usually transmit and listen on the left side of the radio and try to listen my own signal on downlink with the right side of the rig. With a single mobile whip the sensitivity of the downlink rx is usually not good enough during the transmission. This might be better with separate antennasa for uplink and downlink. I have planned to use my Arrow yagi with FT-8900R. As the Arrow's diplexer is rated only max 10 watts, I bought 100w rated separate diplexer to be used with '8900 instead. But I have not tried this combination yet. 73 de Ari OH3KAV / OH7KA Tampere, Finland (grid: KP11) ___ 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] VX-8x or TH-D72A, which is better for working satellites?
I'm thinking about purchasing a couple of new HTs for the XYL and I to carry around but I'd like to make sure that whatever I get works well with the birds. Being that APRS is a must I narrowed down my choices to the Yaesu VX-8DR and the Kenwood TH-D72A. If I were just using the radio for terrestrial purposes I'd probably go with the Yaesu as the addition of 6m and 1.25m is a great feature for me. If you have one of these units and have used it on the birds I'd love to hear your feedback. 73, Eric W4OTN ___ 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 Digipeaer over Japan (TEMPn-N)
Toyo san, One last idea Every D710 APRS mobile is automatically a digipeater by default 1) by its own callsign, and 2) in support of TRACEn-N. So if someone is in a disaster or otherwise out of range of the normal WIDEn-N network, he can always send his packet via TRACE7-7 and he might get lucky and hit a nearby D710 or other APRS mobile. Only the D710 comes with that enabled by defualt (so we can count on it always being there).. But since 2004 we have requested ALL APRS mobiles that can digipeat (includes tens of thousands of D700's) to set UITRACE TEMP so that all mobiles support this path. But not very many people have done this, so we do not have this reliable invivible backup network in many places. To understand how it works, see www.aprs.org/TEMPn-N.html Bob, WB4APR Original message Date: Sun, 13 Mar 2011 11:28:39 -0400 (EDT) From: amsat-bb-boun...@amsat.org (on behalf of Bob Bruninga bruni...@usna.edu) Subject: [amsat-bb] Re: ISS Digipeaer over Japan To: amsat-bb@amsat.org Toyo san, A few more ideas. It is easy to manually estimate ISS pass times every day once you have heard a pass. See: http://aprs.org/MobileLEOtracking.html 1) ISS over Japan today is between about 0830 to 1830 JST. 2) When you hear the first pass, then you will have additional passes every 91 minutes or so that day. 3) Each day a given GOOD pass is 23 minutes later. 4) But overall-long-term pattern is moving earlier every other day by 51 minutes. 5) So in one week from now, the time window will be 0600 to 1600 6) The pass pattern is about the same. First 2 passes peak to the SE, then NW. Then a low northern pass, then the last two passes are NE and then SW. You can get EXACT pass times from http://heavens-above.com and select a city. However, this web page does not show the 1 or 2 low passes each day below 10 degrees elevation. The problem with using the ISS digipeater is that the survivors in the devistated area do not know the frequency (145.825). One way to solve this is to look for opportunity for someone to take a portable digipeater on an airplane over devistated area. The new TH-D72 HT can digipeat now! So have someone with a D72 catch a ride in an aircraft one day. The D72 can BEACON on 144.64 a MESSAGE BULLETIN with info about the ISS digipeater and the time-window. WHile it is aloft, it can also act as a digipeater on Japanese APRS channel 144.64 and can also capture a list of any APRS stations or mobiles on the air. The short bulletins might say something like this: TO: BLN1 MSG: ISS Digi on 145.825 between 0830 to 1830 TO: BLN2 MSG: Passes are 6 min long every 91 minutes TO: BLN3 MSG: Every day, passes are 23 minutes later TO: BLN4 MSG: Time window moves EARLIER 51m every 2 days Keep bulletins to under 45 characters to make sure that every radio display can see the full bulletin (D7 screen limit). But in small area like Japan, I think it might be easier just to try to drive APRS mobiles (acting as digipeaters) to nearby hill tops on 144.64 normal APRS Japanese Frequency and keep everyone on same frequency without confusion. Bob, WB4APR ___ 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: VX-8x or TH-D72A, which is better for working satellites?
On 3/13/2011 8:29 PM, Eric Christensen wrote: Being that APRS is a must I narrowed down my choices to the Yaesu VX-8DR and the Kenwood TH-D72A. D-72 is full duplex, and the VX-8 is not. Easy decision if it were mine to make. Full duplex makes FM birds so much easier, for both the op, and the other users. 73, Drew KO4MA ___ 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: VX-8x or TH-D72A, which is better for working satellites?
On Sun, 2011-03-13 at 21:28 -0400, Andrew Glasbrenner wrote: On 3/13/2011 8:29 PM, Eric Christensen wrote: Being that APRS is a must I narrowed down my choices to the Yaesu VX-8DR and the Kenwood TH-D72A. D-72 is full duplex, and the VX-8 is not. Easy decision if it were mine to make. Full duplex makes FM birds so much easier, for both the op, and the other users. 73, Drew KO4MA Ewww... I didn't know the VX-8 wasn't full duplex. Yeah, full duplex is definitely a must. Thanks Drew! 73, Eric W4OTN ___ 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] ND9M/MM Op Sked: Tonight
I'll be QRV from DM11 for one more pass very shortly; this one is VO52 at 14/0229Z. It's a low pass here. Then the next VO52 pass at 14/0402Z will be the only time I'll be on from the next grid square south, DM10. After that, I'll be on FO29 from DL19 at 14/0928Z. I'll work up an op sked for tomorrow's grids once I check the navigation charts later this evening. 73, Jim, ND9M / VQ9JC Grid DM11 ___ 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] Using Preamps In Shack
Does anyone have their preamps in the shack as opposed to mast mount? Any major disadvantage to having the preamps in the shack? I just acquired two AR2 SPxxxVDG preamps and understand they are not weatherproof and would need an enclosure to mount near antennas, which for the time being is not possible. Any thoughts would be appreciated. Paul Delaney - K6HR paul.hamra...@verizon.net http://k6hr.dyndns.org:8080 ___ 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: Using Preamps In Shack
Yes I have done this. The feed line loss will essentially add to the noise figure of the pre amp, which is not desirable, but in my case with a 70 foot run of 9913F7 the arr gasfet preamplifier was still worth using on 70 cm. Sent from my iPad On 2011-03-13, at 9:36 PM, Paul Delaney - K6HR paul.hamra...@verizon.net wrote: Does anyone have their preamps in the shack as opposed to mast mount? Any major disadvantage to having the preamps in the shack? I just acquired two AR2 SPxxxVDG preamps and understand they are not weatherproof and would need an enclosure to mount near antennas, which for the time being is not possible. Any thoughts would be appreciated. Paul Delaney - K6HR paul.hamra...@verizon.net http://k6hr.dyndns.org:8080 ___ 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
