[amsat-bb] Question On LO-75
Is LO-75 still functioning? Any information would be appreciated. -- Dave Marthouse N2AAM dmartho...@gmail.com ___ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] UK SDR Question
What's the grid square for the SDR in the UK that was mentioned in this week's ANS news? I think it's at the university of South Hampton. -- Dave Marthouse N2AAM dmartho...@gmail.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] FOR SALE YAESU FT736-R FULLY LOADED
I am selling a Yaesu FT-736R. The radio is in great shape and includes the standard hand mic, speech synthesizer module, ctcss module, 50MHZ module, and the rare 220MHZ module. The rig's internal power supply works great. The equipment was operated in a non-smoking environment. As the radio is in mint condition I am asking $1200 and I'll pay the UPS shipping. It will be sent in it's original packing box. I'm selling it because my new QTH unfortunately won't be practical for a tower and weak signal satellite array. If anyone is interested and has any questions please feel free to E-Mail me at the address below. Dave Marthouse N2AAM dmartho...@gmail.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] Digital Satellites Question
I have been following the digital satellite discussion with great interest. Both sides have valid points. I would like to pose a strictly engineering question. Keep in mind that I'm not an engineer but consider myself reasonably well read on the amateur satellite world. A digital satellite would imply loads of processing power on the satellite. I would assume that with this additional activity that there will be more hardware on the bird with more complexity as this won't be a bent pipe system. With more physical hardware of much more complexity in orbit what about the radiation hazards to this more complex and physical hardware heavier system? Wouldn't a software based system be prone to radiation induced hardware and software glitches? What about shielding etc? Dave Marthouse N2AAM dmartho...@gmail.com -- Dave Marthouse dmartho...@gmail.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] Mystery Satellite Question
I forgot that one of the rigs here was on. It happened to be set for 145.825mHZ in FM. A few minutes ago the squelch was broken by what sounded like 1200BPS AFSK. It almost sounded like the old UOSATS. Checking my satellite tracking program I determined it wasn't CAPE-2, TRITON-1 or DELFIN3XT. What birds are up now that have downlinks on or around 145.825mHZ fm? Maybe I have a set of erroneous keps. Any information on this would be appreciated. Dave Marthouse N2AAM dmartho...@gmail.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] TRIATON-1
Has anyone heard TRITON-1? I listened for two passes today and haven't heard any downlink signals. Dave Marthouse N2AAM dmartho...@gmail.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] General Telemetry Question
I noticed over the years that satellite beacon downlinks transmit their telemetry in a form that must be translated by a telemetry app to their engineering values. Since the information is transmitted from the satellites why not provide the engineering values in the downlink without the extra step having to be done on the ground? What is the logic of doing this? Dave Marthouse N2AAM dmartho...@gmail.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] Cape-2 Keps
Hi Gang, Where are the latest keps for Cape-2 stored? I don't see it in the amsat.org listings. Dave Marthouse N2AAM dmartho...@gmail.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] Funcube AO-73 Heard On Hand Held
I just had the pleasure of hearing the 0236UTC pass of Funcube AO-73 on my TH-F6A with nothing but a Comet tri-band antenna on the radio. I was standing in my living room. For an extremely minimalist receiving setup like that it was a real trip! Signals were strong from the beacon on 145.935mHZ. My kudos to all involved in the project. Dave Marthouse N2AAM dmartho...@gmail.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] Theoretical Question
This isn't a question regarding amateur satellites but it is an interesting theoretical one to pose here and the same laws of physics apply. I know that the higher the frequency that is transmitted from a satellite the larger the Doppler shift will be. The Iridium satellites transmit at around 1.5gHZ. At that frequency I know the Doppler is large. How do they manage to keep the portable handsets on the ground locked to the signal? Are the handsets frequency agile to an extent? How do they achieve frequency lock so that the digital signals are decoded? Dave Marthouse N2AAM dmartho...@gmail.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] Question
What is the frequency of the Estonian Satellite that was launched today and where can the keps be found? Dave Marthouse N2AAM dmartho...@gmail.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] Orbits Questions And Satellite Safety
I know that the earth is surrounded by radiation belts that have the potential of damaging satellites. How dense are they and around what altitudes do they have their most harmful affects? I am going to hazard a guess that this is why higher leo satellites (let's say over 1500 miles high) haven't been launched over the years. Any information would be appreciated. Dave Marthouse N2AAM dmartho...@gmail.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] TDMA Question
I have been doing some reading about tdma digital voice applications such as MotoTrbo etc. I am curious if tdma voice could be used on satellites successfully Do to the time delay particularly using a heo or geo bird. Can someone more knowledgeable than I help in answering this question? Dave Marthouse N2AAM dmartho...@gmail.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] Ham Radio Deluxe Sat Tracking Question
I have a strange problem in hrd's satellite tracking program. When I am tracking arissat-1 the satellite name is written on the screen correctly but the voice announcements for aos, los and other alerts call it the international space station. How can I fix the voice alerts? What files if any can I edit to remedy this problem? Other than that odd behavior the program works well. Any information would be appreciated. Dave Marthouse N2AAM dmartho...@gmail.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: Geostationary Satellites
Question, what is the closest spacing for geo satellites to share the same slot? Is this theoretically practical and or possible? Dave Marthouse N2AAM dmartho...@gmail.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: Geostationary Satellites
How about a high altitude drifter above the geo belt? In fact wasn't that talked about by a few amsat people in the early 80's. I seem to remember hearing it discussed by the late Rip WA2LQQ on the 75 meter Amsat net back in the day. Dave Marthouse N2AAM dmartho...@gmail.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] HB9DRV
Does anyone on this list have a working E-Mail address for HB9DRV the developer of Ham Radio Deluxe? I would like to get in touch with him as I have a few questions regarding the satellite tracking portion of the software. Thanks in advance. Dave Marthouse N2AAM dmartho...@gmail.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] Kudos To Amsat UK
I would like to express my appreciation to Amsat UK and The Batv group for providing the streaming coverage of the Amsat colloquium. The Saturday sessions were interesting and informative. I look forward to catching the festivities on Sunday. Thanks again for a job well done. Dave Marthouse N2AAM dmartho...@gmail.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] Oscar 7 Question
Can someone please refresh my memory. What is the apogee and perigee of Oscar 7. Thanks in advance. Dave Marthouse N2AAM dmartho...@gmail.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] SO-67 Question
Hello, When SO-67 isn't operating in amateur mode is it on a different frequency. If so, what frequency is it and what modulation scheme is used? Dave Marthouse N2AAM dmartho...@gmail.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] Keps Question
I was just on the Amsat keps page. What is the difference between nasa two line and bare nasa two line elements? Dave Marthouse N2AAM dmartho...@gmail.com ___ Sent via amsat...@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] Transit Satellites
With all this talk of the Transit satellites on 149.985MHZ, how are they listed in the keps. I checked for other satellites of interest on the kelso webpage and found navy navigation satellites. There are a few named transit. What Transit birds are we talking about. I want to see how strong their signals are on my scanner. Any information would be appreciated. Dave Marthouse N2AAM dmartho...@gmail.com ___ Sent via amsat...@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] Fractal Antennas?
This seems almost too good to be true. Keep in mind that I'm not an engineer. Maybe this technology could be used for future amateur satellites, wider bandwidth, more gain, less space, etc. http://www.fractalantennas.com/ Dave Marthouse N2AAM dmartho...@gmail.com ___ Sent via amsat...@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] SO-67 Question
I have a question about the timers on SO-67. Their configuration to drop out after a few seconds unless you transmit immediately after or upon a previous station, was that done purposely or is this a software configuration issue. What would be the purpose of setting the transponder to act this way? I am not stating this to criticize but get the answer to this puzzling question. I must say that signal levels are great with this new bird. I have heard it using my TH-F6A with nothing more than the standard rubber antenna which is a radiating dummy load. Congratulations to Amsat SA on this great addition to our satellite fleet. Dave Marthouse N2AAM dm...@pure.net ___ Sent via amsat...@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] SO-67
I haven't heard any activity on SO-67 since the mode vu repeater was on last weekend. Is the satellite in a different mode? If so what is the downlink frequency of the beacon? Any information would be appreciated. Dave Marthouse N2AAM dm...@pure.net ___ Sent via amsat...@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] SO-67
Just for fun I attempted to hear SO-67 on the 1416UTC pass this morning. It was orbit 790 with a max elevation of 79 degrees. I was using my TH-F6A with stock rubber duck antenna. A few minutes into the pass out of the noise came the signal. For this minimal setup signals were rather strong. I knew I would have no problem hearing the bird with my crossed yagis on the tower but I wanted to see how I could push the minimalist envelope with just a stock ht. I was pleasantly surprised with the strong signals. Congratulations to amsat sa etc on a fine new addition to the amateur satellite service. Dave Marthouse N2AAM dm...@pure.net ___ Sent via amsat...@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] Tracking Software Question
Can quicktrak or instantrack work with any other antenna pointing devices other than the KCT? Any information would be appreciated. Dave Marthouse N2AAM dm...@pure.net ___ Sent via amsat...@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] Question Re: Itar
I have been reading the messages regarding the Indian heo satellite. What exactly are the Itar rules? Please fill me in. Dave Marthouse N2AAM dm...@pure.net ___ Sent via amsat...@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
