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[amsat-bb:66028] AO-40 Update, 2003-02-10
- To: amsat-bb@xxxxxxxxx (Amsat Bulletin Board)
- Subject: [amsat-bb:66028] AO-40 Update, 2003-02-10
- From: "Stacey E. Mills" <w4sm@xxxxxxxxxx>
- Date: Sun, 09 Feb 2003 21:13:34 -0500
Due to increasing solar angles, the RUDAK window has been terminated for
this cycle. The K-band window has been slightly lengthened and includes a
2 MA beacon-only session at MA 124-126.
When the K-Tx is active PLEASE run minimal uplink power, especially on
CW. The K-Tx has a hard-limiting AGC, just like the AGC on the old AO-13
S-band transmitter. Strong CW signals markedly suppress the output and
make comprehension impossible. It would help greatly if users with S-band
downlink only, would refrain from using the passband during the K-Tx window.
The command team would also like to ask that everyone stay well clear of
the middle beacon. Stations tuning up directly on the beacon continue to
be heard. Please "find yourself" at one end of the passband or the other,
rather than near the beacon. Strong stations close to the beacon also
trigger Leila, which leads to beacon suppression and loss of data. Your
help in asking such stations to move slightly would be greatly appreciated.
Thank you.
Before the end of the month, it will be necessary to begin increasing ALON
to maintain solar angles. Initially, we will move to approximately ALON=15
degs, but by mid-March we will need to move another ~15 degs. Eventually,
we will move to ALON=45 degs, before beginning our "up and over" maneuver
around the sun. The passband schedule will be altered as the favorable
squint angles move later in the orbit.
N QST AMSAT AO-40 SCHEDULE 2003-02-08
MA 010 040 124 126 134 210 244 010
---------7-----1-----3-----6-----4-----5-----0-----7
S2/K-Tx | S | S | S/K | S/K | S | S | S |
MB | * | * | * | * | * | * | * |
RUDAK | | | | | | | |
V/U-Rx | U | U | U | U | U | U | V |
Uplink | | UL | | UL | UL | | |
-- W4SM for the AO-40 Command Team
--
_______________________________________________________________________
Stacey E. Mills, W4SM WWW: http://www.cstone.net/~w4sm/ham1.html
Charlottesville, VA PGP key: http://www.cstone.net/~w4sm/key
_______________________________________________________________________
----
Sent via amsat-bb@xxxxxxxxxx Opinions expressed are those of the author.
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