Hej Satellitintressenter! hr kommer litet klipp frn ntet,

Fr vrigt s r RS 12 fortfarande tyst och det kanske r s illa att den skadats av solens aktivitet.

AO10 r fortfarande tyst
AO27 har varit igng.
UO14 kr dom fr fullt.

FO20, FO29 r fina satelliter med fr lite aktiva.
AO7 gr otroligt starkt och jag fljde den nda till 4500 km avstnd.

73 Hkan SM7WSJ

AO40
When the ALON/ALAT significantly alters, the M-blk gets modified and also posted here.There has been no significant change in ALON/ALAT from the last posting.

However, we are shortly about to raise ALAT quite a bit, followed by about 3 weeks of drifting past the sun. During this time, the squints will be poor, as will the solar angles. The transponders may be off for much of this time because of the poor conditions and to conserve power. At the end of that time, ALON will be ~335 degs, we will be able to lower ALAT to 0, restore transponder usage, and have some steady improvement over current conditions. By about November 15th, if all goes well, we should be back to ALON/ALAT = 0/0/, where we can stay for ~3 months. More details will follow in a few days.

Klla: Hkan SM7WSJ

Beacon frn RS-12/13 rapporterats har tystnat. Det finns ingen information om varfr detta skett.

Klla: ANS 1/9

Jag har ftt diskkrasch och kan drfr inte gra strre uppdateringar p AMSAT-SMs hemsida fr tillfllet.

Databasen, e-INFO och Oscar-40 nyheterna kan jag dock uppdatera via webgrnssnitt.

Hoppas komma igng under september!
73
Lars SM0TGU

Klla:

AMSAT-DL har nu krt igng tv nya satellitprojekt, P3-E och P5-A. Ls mer nedan:
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AMSAT-DL announces formal go-ahead
for space missions
Phase 3-E and Phase 5-A

In July 2002 the AMSAT-DL (Germany) board of directors gave its official green light to develop and build the two spacecrafts AMSAT-Phase 3-E (P3E) and AMSAT-Phase 5-A (P5A). The high acceptance of the mission goals of these two projects expressed in the recent AMSAT-DL member s survey was the final element to arrive at this decision. Both satellites will be created in a common development process by an international team under the leadership of AMSAT-DL. The P3E satellite is to be launched as communication and scientific platform into a highly elliptical orbit around Earth. The second project with the working name AMSAT- Phase 5-A is destined to enter an orbit around the planet Mars. This spacecraft will then transmit scientific data to Earth – data from experiments on-board P5A as well as – via its repeater function – from experiments on the Martian surface or the planet s atmosphere.

So far three successful Phase 3 satellites were launched under the leadership of AMSAT-DL. The latest satellite of this series, P3D (now operational as AMSAT-OSCAR 40), was launched in 2000 and demonstrated sufficient bus and propulsion capabilities for a flight to Mars. So AMSAT-DL started a closer investigation into the possibility of such a mission. Based on the existing experience base and the overwhelming interest during the AMSAT-DL International Satellite-Workshop last year, the P5A spacecraft will not only carry scientific experiments, but also subpayloads to be released in direction to the Martian surface. Suitable launch windows to Mars exist in the years 2007 and 2009.

Two or three years earlier P3-E to be launched in an orbit around Earth is expected to continue the successful series of AMSAT- Phase 3 satellites. The main task of P3E is to serve as communication platform for the nearly 2 million radio amateurs worldwide. They constitute a network for further exploration of the so called uncoordinated multiple access , to provide simultaneous and freely available service to a large number of groundstations. Using existing technology and implementing the results of the member s survey, several transponders on frequencies between 145 MHz and 10 GHz are planned for P3E. Details will be fixed in a
design and payload meeting in the second half of 2002. Additionally the P3-E spacecraft will be an important test bed for some technology needed for the Mars mission. Work on the P3-bus has been started and a number of modules are already under construction.

So far all AMSAT-DL satellite missions in 1980, 83, 88 and 2000 were launched with ARIANE-launchers from French Guyana into geostationary transfer orbits. The excellent co-operation between Arianespace (with its current ARIANE-5-launch-system) and AMSAT-DL resulted in the development of various arrangements for the launch of secondary payloads on-board of ARIANE-launches. Thus Arianespace will be the first obvious choice for the launches of P3E and P5A.

Peter Glzow, DB2OS, President AMSAT-DL
Frank Sperber, DL6DBN, Vice President AMSAT-DL
Prof. Dr. Karl Meinzer, DJ4ZC, Projectleader

First background information about both missions can be found at:

http://www.amsat-dl.org/p3e/towards-p3e.pdf
http://www.amsat-dl.org/p5a/p5a-to-mars.pdf

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Klla: AMSAT-DL

Bob Bruninga, WB4APR, har lmnat en del info om vad som hnder med PcSat just nu. Har ett utdrag:
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Bob Bruninga WB4APR announced that PCSat has turned DIGI OFF and all 1200 baud TLM off.

Although PCsat has been perfectly usable in the afternoons into early evenings, the satellite is still running the batteries down on every eclipse. So today I thought of one last low power mode I can try so we turned DIGI and TELEMETRY OFF to see if we can make it through just ONE eclipse. That s all we would need to recover PCsat back into a positive power budget.

I will try this for the daytime passes over the USA this week (which will affect the evening passes over Europe).

The lowest power mode of PCsat has been with all BULLETINS and all DIGIpeating turned off. Also we disable 9600 baud 1 minute telemetry as well. Thus the only thing remaining was the once per minute single 1200 baud telemetry packet which is required to keep the heart-beat fail-safe reset timer tickled. What s new, is that we realized that if we switched the 1/min TLM to 9600 baud instead of 1200, we would further reduce the minimum transmit duty cycle in our lowest power mode. Thus halving our transmit current drain.

Unfortunately, our TRANSMIT power is already less than 10% of the overall bus power, so this move will only gain us about 5%, but worth trying… Our minimum transmit average current drain (1 packet per minute) is only about 16 ma out of the nominal 160 ma low power mode. Dropping this in half saves us about 8 ma. Who knows, maybe it is the straw that can give new life to the camel?

Anyway, when PCsat is in this minimum mode, the ONLY thing you will hear will be a once a minute half second noise burst (9600 bd TLM) and nothing else.

Mera info p hemsidan:
http://www.ew.usna.edu/~bruninga/pcsat.html
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Klla: ANS 202