[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Multi Satellite pass predictions ?

What is the cost of this program?
----- Original Message ----- 
From: "Robert Bruninga" <bruninga@usna.edu>
To: <amsat-bb@AMSAT.Org>; <rnutter@networkref.com>
Sent: Sunday, February 29, 2004 1:10 PM
Subject: Re: [amsat-bb] Multi Satellite pass predictions ?

> >>> "Ronald Nutter" asked:
> > When time permits, I like to work multiple passes from different 
> > birds in the course of several hours.  Does anyone know of 
> > software that will give me a printout of when the birds I want
> > to work are within range and where they are ?
> Yes!  See APRStk.
> In addition to showing you a map going out 6000 miles from
> your station so y ou can see any other APRS satellite users
> it has a very valuable display across the bottom of the
> screen.  It shows graphically all satellites expected in the
> next 2 hours and their elevation angle.
> See a sample display on this web page:
>   http://www.ew.usna.edu/~bruninga/astars.html
> Look 3/5ths of the way down the page at the USA  map.
> But now look closely at he bottom of the map and you will see
> a graphical representation of ALL amateur satellite passes 
> over the next two hours.  Each yellow tick mark is 10 minutes.
> You can see at the instant this graphic was taken, that there
> were 9 difference satellite passes in just the next 80 minutes.
> I developed this display for my casual use, becasue no other
> satellite tracking software gave this big picture.  Now I have
> it running all the time in my office and at home so that at any 
> time I walk into the room, a 1 second glance at the screen
> will let me konw what is coming up in the next 2 hours 
> without even touching a thing.  And it runs on an old 386
> laptop.
> I find this display invaluable for casual use.  AND there is more.
> If you hook a Kwnwood APRS radio to he serial port, it not
> only tunes the radio to each satelite as it comes into view,
> it also sets the internal TNC baud rate and Mode as in Mode
> J or mode B or simplex or whatever.  This way, your PC
> doenst miss any passses of anything in view.  If it is a packet
> satellite, it captures a list of all users, and all UI packets.  If
> it is an FM voice pass, then voices just start appearing on the 
> speaker.  I want to add the Kenwood 2000 so I can hear
> the analog birds, but I havent yet.
> But there is more!  If you find that you dont hear but the high
> elevation passes on your whip antenna (with short coax run) 
> you can simpley connect a Radio Shack or any 24 AC TV 
> rotator to two bits on the LPT1 parallel port via a $10 opto-
> isolateor and two Triacs and the program will automatically
> track your small beam to always point at the satelltie in view.
> Its only a 2 wire interface...
> See http://www.ew.usna.edu/~bruninga/rotator1.html
> AND since it is only software, it also tunes the radio for
> Doppler!
> Now again, it is a DOS program, and I am not a modern 
> programmer, but it is just something I wrote because no other
> Amateur Tracking program gave me these simple features for
> casual monitoring of anything that was in view.  Now I wrote 
> this back in 1998, when there were 18 working Amateur 
> Satellites and during an evening you were never more than a 
> half hour from some pass of something...
> These days, their ain't much up there.  Oh y es, the program
> does one other thing not shown on the example above.
> For that photo, I told the program I was interested in ALL
> amateur satellties.  But for normal operation,  you only mark
> the ones you can hear on the FM rig or that you are interested
> in, and only those show up with a solid graphic hump.  The
> others only show up as a thin outline.  THus from a glance 
> across the room, if you see solid, you can work it.  Otherwise
> the display is not cluttered by satellites you are not interested
> in.
> And LASTLY, I have not released a new version of this program 
> in a few years, because I made a lot of changes and now the
> source code just wont work.  ARGH!!!  I dont know if it is new 
> PC's or what, but after spending weeks on it, I have given up.  Thus
> the program has some improvements I would like to make, but
> the only working copy is what is avaialble for download and it
> is old...
> I sure wish some really good programmers would take these
> ideas and put them into their products.  I think one MAC
> tracking program did take the graphic time line idea and
> add it, but I havent seen it in any others..
> I think you can still download APRStk from TAPR.ORG
> from the SOFTWARE link under LATEST APRSDOS, but
> you also have to download and install APRSdos first.
> And you see that its just a not easy thing to quickly do... I just
> wish I could get the source code fixed so I could update
> it and make it stand-alone!.... alas...
> But these days APRSdos no longer requires a validation 
> number so if you have the inclination, just download the
> latest APRSdos (I think it is APRS863.zip) and unzip
> it into an APRS directory and then unzip ASTK-exe.zip
> into the same directory and run APRStk.exe and it should
> work.
> Bob
> de WB4APR
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org