Amateur Radio, Contesting, HomeBrew, Circuits, Expeditions - HamRadio DeLuxe eliminates Doppler effect

Amateur Radio

Home

LF + HF

VHF+ UHF + SHF

Distance calculator

Latest Weblinks

Best constructions

Free e-mail&webhosting

Tired of spam and viruses, but like the idea of FREE email? Are you licenced HAM? With Hamportal.net you can get new email address scanned for viruses and filtered for spam, automatically. Sign up for your free email account!

We offer ad-free quality Web hosting for radioamateur presentation. Ask here now!

HamRadio DeLuxe eliminates Doppler effect

Sattelite operation is requiring a lot of hands. If you would like to have a good signal on the uplink and downlink you need to:

rotate antennas in azimuth

elevating antennas

tune RX (TX) downlink

tune TX (RX) uplink

speak into the microphone

log the QSO

LEO FM satellites like SO-50 and AO-51 have an uplink in 2m band. Doppler effect is smaller than on 70cm band. It’s enough to tune the transmitter on uplink frequency. But on 70cm band is Doppler effect three times bigger and it’s required to tune receiver. FM modulation is readable also by 1 or 2 kHz inaccurancy but it’s still problem. There is very nice solution called Satellite Tracking in HamRadio Deluxe program.

The relationship between observed frequency and emitted frequency from satellite is given by formula. HamRadio Deluxe is using this formula to calculate frequency drift and set the receiver (or transmitter, or both) on ideal frequency. How to use this advantage of Satellite tracking?

Paste in the file „amateur.txt“ latest Keplerian elements and save the file

Connect RIG with a CAT cable

Run HamRadio Deluxe and choose Factory, Model, COM port and Baud rate. If you have a CAT powered from COM port, tick DTR or RTS pin that is suppling a DC current. Of course, RIG must be switched ON and CAT enabled

Correct connection is showed on the main screen – there is showed frequency. If not, check settings or CAT cable

Now click the icon Satellites in upper menu

In the window Satellite Tracking choose the satellites which you would like to predict and work

Click on the tab Observer and input your location. Finish by pressing Add

Click on the tab Ground Control. Choose satellite from a list and mode. Tick VFO RX and into the form Satellite write the downlink frequency. Immediately right is corrected frequency. This one is still tunning

Here is a list from the AO-51 pass:

AO-51

TX: ____.___.___
RX: _435.300.000

Date / time               Azim   Elev  Receive       Transmit
---------------------------------------------------------------
Sat 02-Dec-2006 16:56:00  76.6   -1.1  435.305.386   0           
Sat 02-Dec-2006 16:56:30  73.1   -0.2  435.304.883   0           
Sat 02-Dec-2006 16:57:00  69.3    0.7  435.304.323   0           
Sat 02-Dec-2006 16:57:30  65.2    1.5  435.303.704   0           
Sat 02-Dec-2006 16:58:00  61.0    2.1  435.303.031   0           
Sat 02-Dec-2006 16:58:30  56.5    2.7  435.302.308   0           
Sat 02-Dec-2006 16:59:00  51.9    3.1  435.301.545   0           
Sat 02-Dec-2006 16:59:30  47.1    3.3  435.300.752   0           
Sat 02-Dec-2006 17:00:00  42.3    3.4  435.299.945   0           
Sat 02-Dec-2006 17:00:30  37.5    3.3  435.299.138   0           
Sat 02-Dec-2006 17:01:00  32.8    3.1  435.298.348   0           
Sat 02-Dec-2006 17:01:30  28.2    2.7  435.297.587   0           
Sat 02-Dec-2006 17:02:00  23.7    2.1  435.296.868   0           
Sat 02-Dec-2006 17:02:30  19.5    1.5  435.296.199   0           
Sat 02-Dec-2006 17:03:00  15.5    0.7  435.295.585   0           
Sat 02-Dec-2006 17:03:30  11.7   -0.2  435.295.028   0           
Sat 02-Dec-2006 17:04:00  8.2    -1.1  435.294.529   0

HamRadio Deluxe download is available .: HERE .:

< Prev		Next >

[ Back ]

DX World of Ham Radio

DX News / Choice Snippets of Info

XR5L - Isla Santa Maria, SA-070

QRV between Jan 28 - Feb 4. QSL via CE6AMN. *Website above

ARRL Amateur Radio News

The National Association of Amateur Radio

ARRL Headquarters Closed for Thanksgiving Holidays

ARRL Headquarters will be closed November 27 and 28 in observance of Thanksgiving. There will be no W1AW bulletins or code practice transmissions those days. The ARRL Letter will be published on Wednesday, November 26, but there will be no ARRL Audio News on Friday, November 28. ARRL Headquarters will reopen Monday, December 1 at 8 AM Eastern Standard Time. We wish everyone a safe and bountiful Thanksgiving holiday.

Global Emergency Network Marks Record

The Global ALE High Frequency Network (HFN) -- an international Amateur Radio Service organization of ham operators dedicated to emergency/relief radio communications -- has become the first network to operate continuously for more than 500 days on all international Amateur Radio shortwave bands simultaneously. According to HFN International ALE Coordinator Bonnie Crystal, KQ6XA, the main purpose of the Network is to provide efficient emergency and disaster relief communications to remote areas of the world. "Beginning with a core group of six North American radio operators in June 2007, HFN rapidly expanded to cover large areas of the planet with 24/7 digital communications," she said."HFN was designed to be an open framework for global Amateur Radio emergency services to interoperate on HF using the Automatic Link Establishment (ALE) system." Relying on ionospheric radio communications, interconnected HFN base stations scan the radio bands every 10 seconds, from 3.5 MHz-28.0 MHz. Through this Net, Crystal said, ham operators stay connected with each other at all hours of the day or night in any mode of operation, and can send Internet e-mail or cell phone mobile text messages from the field."

Section Manager Election Results Announced

There were nine Section Manager races this fall, four of which saw no opposition. Election ballots were counted and verified on Tuesday, November 18 at ARRL Headquarters for the remaining five races. Terms of office for these new Section Managers will begin on January 1, 2009.

Make More Miles on VHF

Updated: 2008-11-19 at 12:27 UTC

More info at www.MMMonVHF.de

EA8/G4RGK

EA8/G4RGK will be QRV from Canary islands

ZD8B

Ernie, W1MRQ, is back now on 144 MHz as ZD8B from Ascension Island (II22TB)

Southgate Amateur Radio Club RSS Feed

A selection of circuits, tips, news and humour

European Parliament members get Amateur Radio Year Planner

An Amateur Radio 2009 Year Planner has been sent to all Members of the European Parliament

Venezuelan Radio Station and an Amateur Radio website

Radio Ham Chip N2YO has had a lot of publicity for his Satellite Tracking website from a Venezuelan Radio Station and numerous Spanish Language Blogs

Astronaut KD5MDT - Aurora From Space Video

The New York Times website reports that astronaut Donald Pettit, amateur radio callsign KD5MDT, has created a video of the Auroral Borealis as viewed from the Space Station

MØMCX

Amateur Radio Operator

160m SSB Club Calls Contest - November 2008

107 in the log. Iâ€™ve no idea what my score was since I used N1MM’s DX Serial Contest template to do the logging and the miscellaneous field for logging random text did a hopeless job of being able to edit long club names efficiently. The last time I entered this contest, my log was called into [...]

Waterproof PL259 connectors for Ecoflex

I’ve been lucky enough to purchase 100 meters of Ecoflex 15 recently and the solderless connectors are awesome. Available for Aircell 7 (RG213 replacement) and Ecoflex 10 (Westflex replacement) and this giant 15mm diameter stuff, once fitted they are completely waterproof. My experience with all these products started with me laying down a few runs for my [...]

SSB Field Day 2008 - M0XXT

2008 will go down as a wet year. Both VHF NFD and SSB FD was a soaking experience. Luckily, as with most close knit teams, we laughed it off and worked through it, however a tough act all the same. I didn’t take too many photos due to the extreme wet weather however I managed to [...]

Oliver's Blog

My personal blog about Photography, Linux, HAM Radio and everything else...

How to configure postfix to reject spams

Few days ago I have published quick how-to about how to configure postfix as backup MX. I am starting to like postfix more and more, it is very easy to configure and to deal with. One of the problems you will find out when you use backup MX, that it can be put down on its knees [...]

Configuring Postfix to act as a backup MX server

Lately I have been playing with Postfix, which I needed to use as backup MX for some of my domains. Initially, I was using Zimbra, but I would have to have quite powerfull server to run Zimbra for just forwarding emails / setting it up as backup MX server. Postfix is in this case much [...]

GB0SH 2008 is back!

In the last few years I have attended Special Even Station - GB0SH with a group of my friends in West Wales. This year it would be our 4th time visiting Strumble Head Lighthouse on the West cost of Wales, by Fishguard. This year there will be just 5 of us. Here is the information we [...]