MoonBounce (EME) Operation

EME Operation News AF9Y EME Station Typical Moonbounce Audio Recordings Copy this Weak Signal and WIN $100 !

EME Operation News

For those of you just getting interested in EME - Moonbounce operation, there is a net operation
every weekend where you can obtain additional information or make schedules. The net starts
aprox 1500 GMT on 14.345 Mhz with 432 and above EME. It is followed by the 2 mtr EME net
at aprox 1600/1700 GMT.

EME scheduling from the nets is done with the SKD program. SKD is freeware developed by
W9HLY, N1BUG and AF9Y. Here's the latest version: (181K Bytes)

The data files for SKD87a are updated every Monday Evening by Brian Manns, W3EME. You can contact
him at for automatic emailing each week or you can download it here:
vhfsched.skd (aprox 90K Bytes)

Station data files for SKD87a are typically updated monthly.
Here's the latest (May 19, 1997):
EME Directory of Station Data - dir.skd (aprox 78K Bytes)
Freq for Schedules - freq.skd (aprox 2K Bytes)
Index for Rollcall - index.skd (aprox 2K Bytes)

There is also a database of EME stations information (mailing adr, telephone, etc.) in a PCF Database.
Here's the data:
EME PCF Database File - (aprox 130K Bytes)

For those of you using the FFTDSP program, here is the latest file which is used in the "FIND" mode:
EME WS File for FFTDSP- (aprox 9K Bytes)

AF9Y EME Station

From 1990 to 1994 the AF9Y 2 Mtr EME station consisted of:

EME Array Picture 1988 - 1990 1988-90 EME Array Picture 1990 - 1994 1990-94 EME Array Picture 1994 - 1995 1994-95

During 1994 the array was torn down and rebuilt to allow polarity rotation.
Key areas of improvement were:

Typical Moonbounce Audio Recordings

Two way EME contacts are not as weak as the above weak signal challenge.

A typical medium size EME station is IK1MTZ. He runs 4 x 17lbx antennas and 1500 Watts
Here's what his signal sounds like (and looks like) with typical conditions: (253 K Bytes)

Here is the moonbounce recording of a single yagi station with 500W calling
CQ during an EME DXpedition: (180 K Bytes)

Finally, here is a weak random contact made on the moon. Try to copy the callsign
of the calling station on the first attempt. Most EMEers can copy a signal
like this without exotic filters: (246 K Bytes)

............... and the answer is: unkn30c Callsign

Copy this Weak Signal and WIN $100 !

Do you think you are good at copying weak signals? Well here's a test for you. I am posting
a zipped 1 minute wav file of a VERY weak EME station calling me. I am offering $100 and a
free copy of the FFTDSP42 to the first person who can tell me the call sign
of the calling station. The signal is strong enough to just copy my call (AF9Y) near the middle
of the 1 min period. The mystery station is sending a simple repeat of his call and my call.
The characters "DE" may or may not be between the two calls.

Here's how the signal looked in the current FFTDSP42 program:

Sample of FFTDSP Expand to Full Size (27 Kbytes)

So if you are up to the challenge, here's the file: (390 K Bytes)

The mystery station is one of the calls in this list of all known 2 mtr EME stations:
all2eme.txt (18 K Bytes)

Submittals can be made via my guestbook signin (at the front of this page) or
via Email (see end of this page). The winner with first correct submittal will
be announced on this page. Good Luck

NEW Gary Huntress 1st Winner NEW

After two years of running this contest we have the first winner to collect the $100 prize !
On Jan 23, Gary Huntress successfully identified the calling station. He used MatLab as the primary analysis tool.

Here is a bit of info about Gary:

From:            Gary Huntress 
Subject:        Challenge info

Hi Mike,

On the phone I mentioned that I work at a "Navy Lab".  Just to
clarify, I am an Electrical Engineer at the Naval Undersea Warfare Center
( in Newport RI.  Currently, I'm
writing training software for the Tomahawk and Harpoon missiles.
I recently received my MSEE from the University of Massachusetts at
Dartmouth, and I have just begun my Ph.D.  I'm currently working on an FFT
implementation that can be distributed across a heterogeneous network
(i.e. internet).

Also, I had originally spotted your homepage from a post on comp.dsp.
More recently, I was visiting the SETI League homepage and found you
again.  About 2 months ago I wrote for membership info, and I've
already volunteered as a SETI DSP researcher (although not with the
ground equip).

That was a great "challenge"!  I hope you come up with another one.


Gary Huntress

Gary has agreed to keep the identity of the calling station a mystery so the contest can continue.
I will award another $100 to the second successful identification of the station.

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