How can you tell? They've got enough 10-gallon words in the Abstract to
propel mountains...
Still, I've been wondering if we'll ever find a space propulsion
mechanism that doesn't involve throwing parts of the spacecraft overboard.
Greg KO6TH
Robert McGwier wrote:
I hope they aren't
Hi Rick,
Is the radio doing anything when you click on C- (going to C+) to enable
the CAT system? If not, then you probably don't have the serial port
side of things set up yet.
When you boot the system, Linux will create a set of device files in
the /dev directory. One of these, probably
Hi Rick,
I expect your P-III CPU is doing just fine. I had a similar problem
with gpredict seemingly locking up during a pass when driving my rotor.
The problem was apparently a lack of a response from my controller to a
polling operation (which, being a home-brew device, I never bothered
Hi folks,
So all this talk about Gpredict got me to look at updating my own setup,
which pre-dated the modern Gpredict capabilites. But being so archaic,
I need some help connecting the dots...
I have Gpredict / Hamlib talking to my Yaesu FT-736R radio for Doppler
tracking just fine, but
using the Yaesu GS-232 protocol.
Jim KQ6EA
On 06/22/2014 06:08 PM, Greg D wrote:
Hi folks,
So all this talk about Gpredict got me to look at updating my own
setup, which pre-dated the modern Gpredict capabilites. But being so
archaic, I need some help connecting the dots...
I have Gpredict
02:20z pass sounded like SO-50! Heard KO6TZ and a few others, and I
think I worked NU6O / CN70 - the satellite crossed through North right
at the time of the QSO and the rotor decided it had to spin around, so I
lost his reply.
Nice satellite!
Greg KO6TH / CM98
Glenn Miller - AA5PK
CW Telemetry beacon, as decoded by FLDIGI here in CM98 on the 6/2 0600z
pass. My rotor controller doesn't do flipped operation, so the 3rd
frame got trashed by the rotor needing to swing around as the satellite
passed through North. Some errors in the frames, but for the most part,
during
How?
Greg KO6TH
Paul Stoetzer wrote:
FYI - With Gmail, you can set up a filter to prevent list messages from
being sent to your Spam folder, which solves this problem.
73,
Paul, N8HM
On Tue, May 27, 2014 at 4:50 PM, Glen Zook gz...@yahoo.com wrote:
I just got a similar E-Mail from the
Hi Jim,
Just listened to the Saturday 18:34z pass of FunCube over Northern
California. Nice telemetry beacon, but I could not hear anyone
(including myself) in the passband. Is it still in Transponder mode, or
am I doing something wrong?
Telemetry beacon was at about the predicted 145.935
Ha! Working now... Nice contact with W9AE in Oregon. Low pass, so not
super strong, but now I can start optimizing things... At the end of
the contact, Rx was at 145.960, Tx was 435.155 (both dial readings on my
FT-736r).
Greg KO6TH
Greg D wrote:
Hi Jim,
Just listened to the Saturday
Nice project!
Just curious, what did you do for lightning protection?
Greg KO6TH
Andrew Koenig wrote:
Hello Group!
After about 6 months of work, I'm proud to say that the K5UTD Amateur Radio
Club (University of Texas at Dallas) has finished setting up our satellite
station. Typically it
Howie DeFelice wrote:
I bet (a small bet anyway) my cell phone carrier doesn't save receive
frequency data accurate enough to determine what direction I am driving
though.
You are probably right since the doppler shift is pretty small ( at least I
hope it is :) ) on a
cellphone. The satellite
As others have said, it's a single channel bird, so with contention
(even with perfect behavior on the part of the operators), the channel
is going to be overloaded.
I recommend to folks starting out with satellites to give SO-50 a try,
but late at night when there are fewer people competing
Probably right. So I shouldn't mention he left out the whole of the
Moody Blues' To our Children's Children's Children's album I
suppose ten billion butterfly sneezes is considered the ultimate in QRO.
Drifting back on topic, is Commander Chris Hadfield planning to do a
sequel, perhaps
I think Patrick's comment about needing to use USB when operating CW is
the key one. I also, for the very few times I have attempted CW on
satellites, needed to use USB on the downlink so I could keep my return
signal audible. CW in both directions, even with computer control, is
more
It sounds to me like something is binding. These rotors run at 1 RPM; you
could try running it for 30 seconds and verify that it moves 180 degrees. Then
the same in reverse.
If the motion is correct, then the pot is probably bad. If not, then check for
anything that might keep the whole kit
to be DC-Daylight, so frequently need a
filter to prevent 'blocking' by unwanted high level signals. In that case
preventing the VHF coming into the UHF receiver can be important
Thanks
David
-Original Message-
From: Greg D ko6th.g...@gmail.com
To: Jim Jerzycke kq...@verizon.net; w4tas
I know this has been answered before, but I forget. Given one Diplexer,
is it better to put it on the Tx side to limit the 3rd harmionic going
out, or better on the Rx side to limit the VHF fundamental coming in?
Tony's diagram shows the later; I would have thought the former would be
more
the receive chain.
Yes?
Greg KO6TH
Jim Jerzycke wrote:
Since I use a very good 2 Meter bandpass filter on my 2 Meter output,
I use the diplexer AT the antenna, ahead of the preamp.
Jim KQ6EA
On 01/20/2014 03:41 AM, Greg D wrote:
I know this has been answered before, but I forget. Given one
Hi Peter,
Congrats on working all the satellites - a very dedicated effort!
Weather shouldn't be much of a factor for VHF and UHF communication;
it's not until you get into the microwaves that I have had trouble, and
even with the AO-40 (RIP) 2.4 ghz downlink it wasn't too noticeable.
Hi Joel,
If you're into homebrewing something, instead of fixing a rotor
controller by making a new antenna, why not make a new controller?
The U1xx Rotor you have sounds like what I have. The controller is
simply a mechanical counter that moves a wheel either left or right 10
degrees per
You can't believe everything you read on the Internet
-- Abraham Lincoln
Alan wrote:
tel-new.txt tle-new.txt
I read somewhere that almost 5 out of 2 hams are somewhat dyslexic.
73s,
Alan
WA4SCA
-Original Message-
From: Alan [mailto:wa4...@gmail.com]
Sent:
I get an error 500, which means a problem on their end. Perhaps try to back up
in the URL to their main site and contact their webmaster?
Good luck,
Greg KO6TH
Mike Seguin n1...@burlingtontelecom.net wrote:
This is interesting. Is anyone able to get to the BatchPC site listed
in
the
The lack of manual tuning when under computer control is a fundamental
limitation of the rig. When it switches to CAT mode, the front panel is
disabled. Nothing an external box can do to change this.
For the FM sats, full computer control is still possible, since all you
need is to stay on
Hi all,
Before I try, does anyone know if the new FunCube Dashboard software
will run on Linux under Wine? Except under unusual circumstances, the
only windows in the shack are the glass kind...
Thanks,
Greg KO6TH
___
Sent via
B J wrote:
On 11/13/13, Joen...@mwt.net wrote:
I agree on that also.
Now I'm not picking on them here. But I am a member of Four local
Amateur Radio Clubs. And have been an Amateur since 1975 and have seen
this Hobby change a lot through the years. And in all four clubs 90%
of the newly
Hi Phil,
Interesting idea. I think what you are suggesting is to turn the Amsat
email forwarding service into an email lookup / reply service, where the
sender of the original message would receive a means for contacting you
(your contact email address) in a non-machine readable form. The
Hi Jim,
A 550 response is usually because the remailer's spam filter (or more
specifically, the service the remailer contracts with to provide that
filtering function) thinks your email is coming from a source known to
be a provider of spam. My experience with these filters is that they
are
Interesting... Does anyone else find it odd (or possibly irresponsible)
to put a satellite allocation right up against the band edge. Didn't
they consider Doppler shift? That renders the lower 3+ khz of a 25 khz
slice unusable. Or is this only for NSS use?
Greg KO6TH
M5AKA wrote:
New
It's still on weekly, on 20 meters. 14.282, 18:00z-19:00z for random
checkins, bulletins at 19:00z.
Net controls are Keith, W5IU and Larry, W7LB.
Greg KO6TH
Rob Roschewsk wrote:
I remember the good ol' days when the amsat net was weekly on 75 meters
(was it Tuesday nights?) and wa2lqq
Not to single out Michael on this, but I need to chime in. Realism has
its place, but it also has its dangers. Too much of it, and you just
might get your way.
At work, several major programs were behind schedule. The teams were
working hard, but cutting-edge work is never easy, and
I made my first satellite contact in 1993, a year after I was first
licensed. That first contact was due to a lot of elmering by Walt,
KA6VNU, and the skill of Mel, KW7E, on the other end of the contact.
Since then I have made countless contacts on my own, elmered others
through their first
Bob, for comparison, I used a 30 x 24 grill for AO-40. I found that
moving the dish +/- one click on my controller (10 degrees) would make
a just-audible difference in the received signal strength. So, I figure
10 degrees is the 3db beam width, not good enough, apparently, for the
ISS TV...
Robert C. Campbell kb3...@gmail.com wrote:
2.4 meter dish mounted on 8 foot tower section, with az and el rotors and
home brew 12 turn 2.4GHz helical at focal point. Model 2400 High Siera
HamTV-Down Converter
12 turns for the 2.4 ghz feed sounds a bit long. What is the focal
distance
B J wrote:
On 9/3/13, Clint Bradfordclintbra...@earthlink.net wrote:
... As long as we have these self proclaimed Satellite Instructors
neglecting
the benefit of Full Duplex operation ...
One thing I've noticed a few times on the linear birds is how some
stations operate as if they're still
Hi all,
As I reported on the 20m Amsat Net (14.282mhz Sundays 18:00z - 19:00z)
this morning, I noticed that my 2m antenna was listing slightly
down-hill. Suspecting that the boom attachment screws had come loose,
my project for the day was to go up on the roof and align and tighten them.
Hi Mike,
Yes, the length of the elements will be affected. Fatter elements look
electrically longer, I think, so they may need to be shortened a bit to
compensate for a shift in frequency. Impedance may be affected as well.
You will also need to keep the same mounting scheme, as to whether
I forget... Do these kinds of motors change their current draw
significantly when they stall? If they don't, a current probe may not be
a reliable stop indicator.
Also, regarding the challenge with 450 degree rotation... There's no
requirement that you actually use all 450 degrees. Just stick
Yes, indeed the fine art of pulse counting works very well. My rotor
controller does the same with the clicker kind of rotors, where the
contacts were intended to drive a solenoid ratchet switch mechanism for
positioning. Instead of the Arduino, I used a Basic Stamp (this is
pre-Arduino
Hi Dave,
If the noise came and went sharply (like someone turned something off
for a week), and man made sounding, perhaps one of your neighbors put
up a solar power array? Lots of diodes and the power inverter running
during the day...
Just a thought,
Greg KO6TH
Dave Larsen PhD wrote:
A member of our radio club is familiar with the rocket, from some past work.
He said that the sensors are not keyed, and the This side up label is in
rather small print. Between that and Murphy, I wonder why this wasn't a more
frequent occurrance...
Greg. KO6TH
Alan wa4...@gmail.com wrote:
:
Maybe the un-assembled frame was oriented nose down when he
installed them...so this side up made sense...
Roger
WA1KAT
On 07/21/2013 12:46 PM, Greg D. wrote:
A member of our radio club is familiar with the rocket, from some
past work. He said that the sensors are not keyed, and the This side
Most use a cross-arm to mount the antenna, even if the cross-arm is not
rotatable in Elevation. Then you can attach the antenna in any
elevation desired, and mount both a 2m and 70cm antenna, one on either
side of the rotor for balance.
I suppose bending the mast pipe would work too. I
And it's free. And that includes not having to pay for anti-virus
software on top of paying for the O/S (though in this case apparently
Win 7 is already there), or reboot for the ever-coming patches. And even
if you use the free AV software, it still takes up valuable CPU and
memory resources,
BIOS setting? On most PCs, the parallel port can be configured in one
of 3 modes. You might try the other settings...
Greg KO6TH
Nitin Muttin wrote:
Aayush,
ok noted. Centronics = LPT or parallel port
Can you provide more information.
1. which tracking application you are using.
Hi Rolf,
My understanding is that the material used for center pole in a helix
doesn't affect the antenna dimensions or performance much at all. So,
feel free to use whatever material you have handy that will work
mechanically and environmentally (e.g. ice load and sun exposure). I've
Hi Rolf,
I don't believe that's possible. It would be like asking for a screw
that can be turned in either direction. L / R switching is done by
switching between two antennas.
Greg KO6TH
Rolf Krogstad wrote:
Thanks, Bob.
Is there a commercial yagi available for 435 MHz which is R-L
2 mhz? Yeah, that would be tough... Ok, DVB-S it is.
Thanks all for the education. There's a swap meet coming up in a couple
of weeks... Sounds like I have a now have a mission. :-)
Greg KO6TH
M5AKA wrote:
--- On Mon, 13/5/13, Greg Dolkasko6th.g...@gmail.com wrote:
Is there
A dish like in the picture probably has a beam-width of 15-ish degrees.
I used a 30 inch BBQ grill antenna for AO-40, and would notice a
drop-off when mis-aimed by about that much. ISS moves VERY quickly
compared to AO-40, so some sort of active positioning on both axis is
going to be
For the digital TV challenged, what means Any DVB-S Decoder which can
decode a 1.3 MSym/s TV signal? How would I know if I have such a
thing, or what I would need to get if I don't.
Greg KO6TH
I0ELE wrote:
Certainly!
You can find the nominal link budget on
MSym/s.
Emanuele I0ELE
Il 13/05/2013 0.15, Greg D ha scritto:
For the digital TV challenged, what means Any DVB-S Decoder which
can decode a 1.3 MSym/s TV signal? How would I know if I have such
a thing, or what I would need to get if I don't.
Greg KO6TH
I0ELE wrote:
Certainly!
You can
Pinnacle PC Card is not for DVB-S (Satellite
networks) but for DVB-T (terrestrial networks).
Please check on the web or give me the model of your card, so that I
will check it.
Emanuele I0ELE
Il 13/05/2013 0.45, Greg D ha scritto:
Hi Emanuele,
Right. But what is that in terms of what normally gets
Bryce Salmi wrote:
Hello everyone,
I am a senior studying Electrical Engineering at the Rochester
Institute of Technology (RIT) and I am a member of a senior design group
that was sponsored by AMSAT to produce an engineering prototype *Maximum
Power Point Tracker* (MPPT) for the Fox-2
Um, the dates in the article are from 2012 (that be last year).
Interesting stuff, but why is NASA posting it now?
Greg KO6TH
B J wrote:
http://www.nasa.gov/mission_pages/GLAST/news/bullet-dodge.html
73s
Bernhard VA6BMJ @ DO33FL
___
Sent via
Further to what Gus writes, I think Method #3 will suffer from two
assumptions, giving an impression of precision when less should be
expected. First, you are highlighting the shadows that mountains and
other terrain should give, but which are only applicable to visible
light. Radio waves bend
Hi Samudra,
See: http://home.wavecable.com/~ko6th Near the top of the page, on the
left, are links to the design document and code source for what I
created. It's not a kit, but rather a discusson of the various pieces
needed to make such a controller, which you can adapt as needed to
Lee Maisel wrote:
James French wrote:
What are the possibilities of building a satellite that uses a Linksys
WRT54GL router with a modified DD-wrt or HSMM-Mesh software as a store
and forward BBS, to route a received request from one station to another
station, or even to connect to a on board
Hi Kevin,
With SSB, pretty much required, in order to get your Tx and Rx aligned
with each other and with the others you are talking to. It can be done
by computer with half duplex, but the operator on the other end will
probably need to work harder.
With FM it's highly recommended, not so
I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock? (Assuming it's an icy thing...)
Greg KO6TH
Vince Fiscus, KB7ADL wrote:
At 09:01 AM 2/8/2013 +1100, Tony Langdon vk3...@gmail.com wrote:
On 8/02/13 7:49 AM, Bob- W7LRD wrote:
maybe asteroid bounce? (EAE)
73
The thing that's suspicious is that 450 is the limit of rotation. I
don't know which end of the movement potentiometer that represents, but
you might have a loose position sense connection or dirty pot wiper. The
controller would think it's not where it's supposed to be, and tries to
move in
The only problem is that all the boxes have people's license plate
numbers embossed on the side.
Greg KO6TH
Jeff Yanko wrote:
Geez, I hope this doesn't mean we have to start committing crimes to
get our dreams built.
I believe it was Oscar-7.
Greg KO6TH
Alan wrote:
Someone years ago told me that one of the early amateur satellites had a
mode-L beacon, but because the rules changed, it was never turned on. I
haven't been able to verify or disprove this story.
Alan
WA4SCA
-Original Message-
If anyone is considering this, but is stopped because their PC doesn't
have the required ISA slot, please let me know. I have one such
motherboard sitting on my workbench, looking for a home.
Greg KO6TH
K R Yoksh wrote:
Just FYI, the Kansas City Tracker auction on Ebay is ending in 2 days.
Congrats, Betsy,
If you want to take it to the next level, send an APRS message to
email, with your email address as the first word, and watch it drop
into your in-tray on the other end. That means that you can send email
to anyone on the planet from anywhere on the planet, even if you're out
Hi Alan,
I'm not even sure about the intellectually part. Hopefully just the
exception, but a few years ago I had to gently guide a new ham to
realize that they should not attempt to run their 12v rig off 120v and a
lamp dimmer turned down... Oy.
Greg KO6TH
Alan P. Biddle wrote:
Bob,
It's been done a number of times, though like most things, it's a
compromise that will work better for some satellites than others.
The thing about the Elk or Arrow that works well with their usual
(hand-held) use is that they are linearly polarized, but mounted on a
3-axis rotor system (your
Actually, the first thing I install on a new computer is Linux
(OpenSuse, usually), then put Windows in the virtual machine, if I need it.
But, to Drew's question, consider APRSIS32 for APRS use. There's even
some satellite tracking capability, so you know what other APRS stations
are within
Hi Mike,
Generally, Sat operators don't call CQ, at least not like they do on HF.
Especially on the FM birds, the general protocol is to throw your call
sign in during a pause in the activity, when you can find one. It's more
like working through a busy terrestrial FM repeater. The trick is
And if you don't have an old computer with an ISA slot, I have a spare
motherboard if anyone wants it. (I have enough computer relics, and this
one is too modern anyway...)
Greg KO6TH
Tom Lubbers K8TL wrote:
I have a Kansas City tracker tuner. Cleaning off the Stuff not in use shelf.
If
The easiest software I've seen to set up for iGating is APRSIS/32
(Lynn's software). iGate is enabled by default, and you just need to
tell it what port to use for the radio (external KISS TNC is easiest)
and what server on the Internet side. Done.
Greg KO6TH
Andrew Glasbrenner wrote:
Hi
Joel Black wrote:
@KO6TH: I like your approach. Let me see if I got my head wrapped
around your design - serial interface to the FODtrack board which then
controlled your controller? That's pretty cool.
Hi Joel,
Well, sort of. FODTrack has two different Az/EL rotor interfaces which
you
So, all the on-line information seems to point to this solution -
putting a diplexer (filter) on the 70cm side to tap off and absorb the
incoming 2m signal. Isn't there also a design where one puts a filter on
the 2m side, to tap off and absorb the 70 cm (3rd harmonic of 2m) signal?
I would
If I understand your wiring, I think you have it correct.
Is this what you are trying to do?
http://www.amsat.org/amsat-new/articles/Mode-J/
Note that for mode-B satellites where you are transmitting on 70cm and
receiving on 2m, this won't work. In my experience, the extra filtering
is also
Hi Mani,
Congratulations on the recovery of VO-52; it's great to have our friend
back.
I am curious if ISRO will be issuing some sort of report on what
happened. I understand that they will have limits on what they can say,
but if there is something the satellite community can learn from
Hi Dave,
How long does one have to stall the motor before the windings'
insulation starts to degrade? I seem to recall it's not very long (less
than minutes).
With all that thermal mass, and the insulation from the heat shrink
tubing, is the thermal switch really going to be effective
Another $.02 from this neck of the woods...
BNC connectors may generally be more robust than SMA, but BNCs are not
totally free from problems. The center pin on my Alinco DJ-580 cracked
away from the wire going to the PC board, and the cylinder came loose on
its mounting (allowing it to
Hi Alan,
I found the following listing in a 1982 Foreign Listings Callbook: (I knew I
saved this for a reason...)
JA8TCH Mori Seigi, 81-75 Taihei, Shinoro, Kitaku, Sapporo, Hkd 001
Now, that was from 30 years ago... presuming the call hasn't been re-issued,
maybe a starting place?
Good
So, how are they going to compensate for Newton's 3rd Law when ejecting 50 3kg
masses, one at a time?
Greg KO6TH
Date: Sat, 14 Jan 2012 16:14:57 +
From: m5...@yahoo.co.uk
To: amsat-bb@amsat.org
Subject: [amsat-bb] QB50 Video
A visualization of the launch and deployment of 50
Hi Bob,
Is this something where a West Coast command station would be more likely to
succeed, given the satellite's West-to-East orbit. Catch it while it's still
over the ocean, before the mass of home station beacons come in to view? That
was our unfair advantage in making contacts with
Hi Joe,
I believe the two sides of both of the satellites had different, fixed,
frequency settings. So, you can tell which side it was by what frequencies you
were using.
Greg KO6TH
From: gary_mayfi...@hotmail.com
To: amsat-bb@amsat.org
Date: Sun, 8 Jan 2012 08:07:44 -0600
Subject:
Hi Joe,
For RS-10/11, I'd recommend just using RS-10. I don't recall ever hearing the
11 side of that bird on during the several years that I worked it.
They did a lot of switching around of RS-12 and 13, especially towards the end
of its life, so that one will be harder to select.
Greg
Hi Doug,
You might check out Lynn KJ4ERJ's APRSISCE/32 package. The development version
can track satellites, and as an APRS App it's dynamically self-position aware
by default. I don't think it currently outputs to anything that can drive an
antenna or Doppler tracking, but the program is
Hi Bob,
I'm trying to visualize you driving (bouncing) down the freeway at 70 mph with
a square yard of curved (airfoil!) metal sitting at odd angles to the air flow,
trying to aim it at a target you may not be able to see clearly, which is also
moving at some rate in another direction, with
I've heard FO-29 with my F6, though kind of barely. You definitely need an
external
antenna (more than just an extended whip), and another radio for the
uplink since the F6 is FM-only on transmit (and it's not full duplex).
Greg KO6TH
From: aa...@fidmail.com
To: k4...@k4feg.com;
Hi folks,
I just received an ARISSat-1 pass that crossed into eclipse about 80% of the
way by. As expected, the FM signal dropped pretty much immediately upon
entering eclipse. But that's not the reason for the post...
I got a really neat SSTV picture of the Sun streaming into the camera,
Hi Zack,
It sounds like you don't have a clear enough signal from the satellite. For a
good picture, you will need to have full-quieting FM reception. How did the
voice announcements sound, prior to the SSTV session?
On good pass earlier today, I copied this picture:
), and I was able to get it to S7-S9 as long as I
wasn’t in the trees. I posted some of my pics on my blog:
http://kd8ksn.blogspot.com/2011/12/september-2011-in-effort-to-reduce.html
Zack
KD8KSN
From: Greg D.
Sent: Friday, December 30, 2011 7:14 PM
To: inservice2...@hotmail.com ; zack.kd8
SSTV pictures on HF are often in Scottie-1 mode, while the ARISSat-1 are in
Robot-36. Perhaps you are receiving in the wrong mode? That's about the only
thing I can think of that might be mis-matched, if HF works, since with the
satellite's downlink being in FM mode, you can't be off in
Hi Carl,
Well, same results here. Success early in the week, but nothing since. I
wonder if our collective traffic has reset something up there?
However, on my last try (last night), I copied one beacon clearly - decoded and
forwarded to IS - but I also heard a few other weak packets by ear
Hi Kevin,
It's FAST1, no dash. Good luck,
Greg KO6TH
From: summit...@live.com
To: amsat-bb@amsat.org
Date: Sat, 10 Dec 2011 02:42:34 -0800
Subject: [amsat-bb] FAST1
Sorry I meant the Stations Heard via ISS I know about logging in to the
Maildrop. Did not get in on the pass I
Interestingly, the last two attempts (two nights ago, and this evening) to
repeat this have failed. I briefly tried the other uplink frequency, 145.980,
tonight, without success either. I did hear 4 or 5 beacon packets from FAST1
(they're quite distinctive, with all the Gs in them), so
that is an operating system thing, then?
73,
Jerry
N0JY
On 12/4/2011 12:52 AM, Greg D. wrote:
Thanks for the update, George.
One note... The Epoch.txt file is named in all upper case on the website,
while the program expects it to have only an initial capital E. Some
systems (e.g
Thanks for the update, George.
One note... The Epoch.txt file is named in all upper case on the website,
while the program expects it to have only an initial capital E. Some systems
(e.g. Linux) are sensitive to this, and can't find the file.
A simple rename, and all is well.
Greg KO6TH
Many Hams used RS-12/13 when it was below their horizon (often without
knowing it), due their HF uplink getting bounced and bent around by the
ionosphere before hitting the satellite. So, it wasn't necessary for the other
station to be in the traditional satellite footprint to be heard.
My first thought is to use candle wax, as long as your etching solution is used
cold. Warm the board up and coat the one side and holes, let it cool, and then
do your thing on the other side. I've made simple single-sided boards in the
past by using a toothpick to scrape away a line between
I also have an old Motherboard with an ISA slot. Just the motherboard,
processor (1ghz, I think), and memory. I do not have anything that needs the
ISA slot anymore, so it's up for grabs. No reasonable offer will be refused.
My wife insists... :-)
Greg KO6TH
Date: Thu, 3 Nov 2011
. So, I
wouldn't be able to tell.
Sorry, not much help on those points.
Greg KO6TH
From: msch...@creative-chaos.com
To: amsat-bb@amsat.org
Date: Wed, 5 Oct 2011 07:12:55 -0500
Subject: [amsat-bb] Re: Gpredict
On Tue, 2011-10-04 at 22:36 -0700, Greg D. wrote:
Easy to install
I use it all the time. See below.
Let me know if you need any screen shots or have any additional questions.
Greg KO6TH
From: clintbradf...@mac.com
Date: Mon, 3 Oct 2011 15:36:57 -0700
To: amsat-bb@amsat.org
Subject: [amsat-bb] Gpredict
I need a couple user comments regarding
The ISS isn't going straight through the Penumbra, top to bottom, but rather
diagonally through it. Neglecting that the ISS isn't going in a straight line
either (it's an arc), the 8-ish seconds are the hypotenuse of the triangle. We
still don't know the height.
I wonder if we can figure
Based on posted observations, I have come to the conclusion that the
satellite's MET comes up at either 0 or 1 when the satellite turns on, after
the 10-or-so minute delay after entering sunlight. Depending on what mode it
thinks it should be in, I suppose it's possible that it might in fact
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