[amsat-bb] Re: volunteering (Mobile Satellite Predictor)
On Tue, 2009-10-20 at 12:56 -0400, Robert Bruninga wrote: > RESULT: Every mobile everywhere that is in view of a satellite, > even without any prior planning, will be alerted to a satellite > in view, its direction and elevation, its frequency and its > Doppler, right there on the front panel of his APRS radio. > Bob, I am one in total agreement with you on this one. We can all get this information on the iPhone, (and maybe other smart phones), our netbooks, laptops and our desktops. But while driving down the road at 60 or so miles per hour and seeing a current FM sat come up on my D-710/700 in the footprint via RF with an elevation and azimuth that is currently workable is the ultimate solution in my mind. I am one of those 1,000's of operators worldwide you referenced transmitting current satellite positions on a local network, in my case via digi_ned on our local UHF alt-net running on 440.800Mhz at 9.6kbaud within a portion of NWAPRS coverage area (Puget Sound). Within this coverage area it works great, its so nice to glance down at the display and see AO-51 (or others) to the west and over 30 degrees, I hit PM3 and listen to the pass. Sometimes, I even make a contact or two. You have defined the problem very well, when mobile and outside the footprint of a repeater providing this information . well what do you do, your only option is to revert back to the internet. Not the ideal solution in my mind. I like RF, thats why I am an amateur radio operator. I am not smart enough to provide a solution. But, it seems to me, that if local igates do not gate these types of packets back to RF in their operational area then the only solution is for us 1,000's of digi operators worldwide to provide this information in each of our operating areas. I always enjoy reading your posts Bob .. Thanks for all you do 73 kim ___ 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] Re: Pass prediction algorithm
On Mon, 2010-06-28 at 10:26 -0700, B J wrote: > > --- On Mon, 6/28/10, Reid Crowe wrote: > > > From: Reid Crowe > > Subject: [amsat-bb] Pass prediction algorithm > > To: amsat-bb@amsat.org > > Received: Monday, June 28, 2010, 8:59 AM > > I'm trying to write my own pass > > prediction program for tracking FM > > satellites. This program will this notify the users > > of upcoming passes > > via APRS messaging. I would like to find an algorithm > > that will predict > > AOS/LOS time and azimuth and the maximum > > elevation. I'm also hoping > > this algorithm will not be too computationally intensive as > > it may > > possibly be used for hundreds of different station > > locations. > > > > Can anyone help? > I would suggest you look at the digi_ned source code. It works great and does everything you want. There was a change on the last update where he replace the display of azimuth/elevation to HIGH(over 30 degrees) and LOW (Below 30 degrees). That change actually works very well when driving down the road. But it was nice to see the actually numbers when sitting still. The code before this last update did that. 73 kim - ac7yy ___ 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] Re: Reminder
On Mon, 2009-06-01 at 15:42 -0400, Martha wrote: > The deadline for nominations for the AMSAT BOD must be received at the AMSAT > office no later than June 12th. A nomination requires either one AMSAT > Member Society What is an AMSAT Member Society? > or five current AMSAT members. A director serves 2 years. > Our address is: AMSAT, 850 Sligo Ave #600, Silver Spring MD 20910. 73 kim - ac7yy AMSAT #26076 ___ 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] Re: [Senior-officers] Re: Reminder
On Tue, 2009-06-02 at 08:16 -0400, Andrew Glasbrenner wrote: > > > > What is an AMSAT Member Society? > > > > Think of it as a club joining AMSAT. If your club has paid their dues as a > Member Society of AMSAT, they may vote to nominate you in lieu of 5 > individual members. > > 73, Drew KO4MA > Thank you Drew 73 kim - ac7yy ___ 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] Re: Using D710 to work the sats?
Hi Marv I have used both the D700 and the D710. I have not noticed much difference in the receive between the two radios. I use both a 5/8 wave duel band and a 1/4 duel band on my durango. The 1/4 works much better but I have made contacts with the 5/8 wave when I am out in the open. I use 435.300 VFO (5Hz Steps) with it set to 'CTRL' on the right side and 145.920 memory channel on the left side in my PM setting. That allows manually changing the downlink thoughout the pass from 435.310 to 435.290 when operating AO51. To change sat's I change only the uplink memory channel and then manually change the downlink to the appropriate freq. 73 kim - ac7yy On Mon, 2009-06-15 at 21:21 -0500, racer5039 wrote: > I have been playing with my homebrew antennas and the D710 I have in the van > to try and work AO-51 portable and get ready for field day. > The first setup in the driveway was a pretty high pass and I couldn't hear a > thing. My next try was out in the country. I had the D710 hooked up again and > it seemed to be deaf. There was a fellow ham there with an 817. when we > hooked it up to the 436 homebrew cheep antenna, it could hear quite well. > Better than the Elk antenna that I just got in fact. > My question is the D710 that tight on the rec. that its not going to hear the > sat if I am off frequency a little? > Is there anyone on the board that is using or has used the D710 to work any > of the FM sats? > if so, can you e-mail me off the board with any input you may have on this > set up. I'd really like to be able to work field day and I am running out of > time. > > Thanks > Marv > N0FJP > ___ > 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 ___ 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
