AMSAT-SM - Official Website of AMSAT-SM SwedenThe passbands will be operational again within a few days from approximately MA 20 to 100.
This interval will change as we follow the sun and ALON increases toward 360.
We are awaiting one more good set of images and verification of ALON/ALAT before activating the passbands.
– –W4SM for the AO-40 Command Team
Alon/Alat 18/5 329/7
Klla: amsat
There has been a high level of mail in recent days re: hearing AO-40.Readers of the amsat-bb should be aware from Stacey W4SM s recent posts that AO-40 has now entered a drifting phase.
The information below (prepared by W4SM) details the predicted behaviour of AO-40 through to the middle of May.
Please note the information is on a day by day basis, not orbit by orbit.
The information is presented to assist those who are fine tuning their gear,collecting telemetry etc.
On the subject of telemetry collection the norm for 100% OK blocks is for Squint angles, 0 to 36 and 60 to 70 degrees.
I mention norm, because the above ranges of squint angles apply when the Alon/Alat are nominally 0/0.
However during the drifting phase the norm no longer applies, specially in respect to the side lobe at squint 60 to 70 degree. Good reception of telemetry is available in the 50 to 70 degree range, but is range dependent.
There are lots of positives that can be gained during this drifting phase.Every block of telemetry forwarded to ao40-archive@amsat.org is greatlyappreciated.
Colin VK5HI (AO-40 Command Team Member)
AO-40 ATTITUDE – PRECESSION BEHAVIOR / W4SM
Mystery Effect = -17.760 degs ALON/week
DATE ALON ALAT SA
2003 Apr 22 [Tue] 31.0 21.8 -36.6
2003 Apr 23 [Wed] 28.3 21.8 -38.9
2003 Apr 24 [Thu] 25.6 21.8 -41.0
2003 Apr 25 [Fri] 22.9 21.9 -43.0
2003 Apr 26 [Sat] 20.2 21.9 -44.8
2003 Apr 27 [Sun] 17.5 21.9 -46.4
2003 Apr 28 [Mon] 14.8 21.9 -47.8
2003 Apr 29 [Tue] 12.1 22.0 -49.0
2003 Apr 30 [Wed] 9.4 22.0 -49.9
2003 May 01 [Thu] 6.7 22.0 -50.5
2003 May 02 [Fri] 4.0 22.0 -50.8
2003 May 03 [Sat] 1.3 22.1 -50.9
2003 May 04 [Sun] 358.6 22.1 -50.6
2003 May 05 [Mon] 355.9 22.1 -50.0
2003 May 06 [Tue] 353.2 22.1 -49.2
2003 May 07 [Wed] 350.5 22.2 -48.0
2003 May 08 [Thu] 347.8 22.2 -46.7
2003 May 09 [Fri] 345.1 22.2 -45.1
2003 May 10 [Sat] 342.4 22.2 -43.3
2003 May 11 [Sun] 339.7 22.2 -41.3
2003 May 12 [Mon] 337.0 22.3 -39.2
2003 May 13 [Tue] 334.3 22.3 -36.9
2003 May 14 [Wed] 331.6 22.3 -34.6
2003 May 15 [Thu] 328.9 22.3 -32.1
Klla: amsat
Dear friends,
NLSA is pleased to announce availability of the LabJack PiggyBack, an add-on board for the JabJack U12. The PiggyBack allows the versatile, inexpensive, USB-based JabJack U12 to connect directly to Yaesu-type rotator control boxes.
Read about the PiggyBack here
http://www.nlsa.com/labjack/labjack_piggyback.html More information about the LabJack U12 is here
http://www.labjack.com/labjack_u12.html 73 Hkan
Klla: WWW
Finnish HF/VHF/UHF/SHF balloon experiment
Hi all,
this Autumn will see the flight of Ilmari 2003,
an AMSAT-OH balloon experiment carrying the
following hardware:
– – GPS receiver
– – 70 cm 100 mW APRS beacon
– – 3.5 MHz 1 W beacon
– – 23 cm FM ATV 1 W transmitter
– – two colour video cameras
– – Indoor Housekeeping Unit (CPU)
– – 2m in/70 cm out 1 W linear transponder
– – remote monitor and control radio interface
– – electronic remote mission abort system
– – landing parachute
– – 14 V, 12 Ah Lithium Thionyl Cloride battery
Most of this hardware is already flight ready
and will be undergoing thermal chamber testing
soon. The hydrogen balloons we have acquired
should allow us reach an altitude in excess of
30 km giving excellent range, depending on the
TBD launch site(s).
The linear transponder can support multiple
SSB/CW/digital ham radio QSO s and should be
easily copiable in our neighbouring countries
also. On 23 cm, the ATV transmitter will be
able to show either horizon or nadir views
under remote control. For reception one only
needs a standard analogue SAT-TV receiver +
TV and a decent 23 cm LNA. APRS packets are
planned to be copiable mobile and portable
for the search team and others interested.
Most of this hardware will be dry running
at our national microwave roundtable
Gigaleiri and also our national SRAL summer
camp.
For more reading, audio files and photos, see:
RFpayloads:
http://www.kolumbus.fi/michael.fletcher/ilmari.htm Everything else:
http://www.viestikallio.fi/ilmari/index.php 73 s Michael, OH2AUE
Klla: amsat