Tag: Oscar 40

We have almost reached ALON=45 deg. and we are beginning to raise ALAT to just above 20 degs.

This will take approximately a week to 10 days. When we are confident that ALAT exceeds 20 degs, we will shut off the passbands (beacon on only) and begin drifting toward ALON ~315 degs. The drift process (passbands off) will take approximately 4 weeks. We can be a little more specific after we know the final spin rate.

– –W4SM for the AO-40 Command Team

Klla: amsat

Lite status om Oscar 40 frn ANS kommer hr (OBS! nytt schema ocks!):

AO-40 continues to move in ALON, keeping ahead of the sun. As of 31 Oct 2003, AO-40 s attitude was ALON/ALAT ~ 30 / 0. ALON will slowly be advancing to 45 deg.

The passband schedule has been modified slightly and the K-band window has been discontinued.

Stacey Mills, W4SM, provided the following update regarding AO-40 s telemetry beacon. Stacey says, FEC is turned on as for as many orbits as possible, working around the need for pictures and other command functions.
FEC mode requires loading the IHU-2 each orbit and this is not always possible; however most orbits have FEC active. The FEC routine has been modified to allow the option of cycling between normal mode telemetry including message blocks and event blocks, and FEC mode telemetry (A-blocks only). With this option, the normal mode is currently active from 0 to 16 minutes of the hour, and the FEC mode is active for the remainder of the hour. This allows time for users to read the message blocks and for event blocks to be collected. During transition between these two modes, up to 1 minute of beacon idling (hex50) may be heard before the new mode starts.

The AO-40 team would like your telemetry files! Please zip compress your daily telemetry files and e-mail to: ao40-archive@amsat.org

Klla: ANS 306

Vill ni se schemat fr passbandet p ett mer verskdligt stt s sk via google p KEPS (dom som sljer AO40 utrustning)

Ni gr sedan vidare p AO40 info s fr ni schemat i frg.

Klla: www

AO-40 is currently at ALON/ALAT = 20/0 and we continue to advance toward 45/0. We are holding the current position for the moment, but the next jump of approximately 10
degrees (ALON ~30) will come in about another
week.

At that time we will discontinue the K-band window and move the U/L -> S2 passband window to later in the orbit, as well.

We are running FEC on as many orbits as possible, working around the need for pictures and other command functions. FEC mode requires loading the IHU-2 each orbit and this is not always possible; however most orbits have FEC active.

We have modified the FEC routine to allow the option of
cycling between normal mode telemetry including message blocks and event blocks, and FEC mode telemetry (A-blocks only). With this option, the normal mode is currently active from 0 to 16 minutes of the hour, and the FEC mode is active for the remainder of the hour. This allows time for users to read the message blocks and for event blocks to be collected. During transition between these two modes, up to 1 minute of beacon idling (hex50) may be heard before the new mode starts.

– –W4SM for the AO-40 Command Team

Klla:

Due to the worsening solar angle we must begin off-pointing ALON at the rate of about 1 deg/day. For the moment the passband schedule will remain as it is, but it will be shifted to later in the orbit within a few days.

2003 Oct 05 ALON/ALAT ~ 5 / 0

ALON will be slowly advancing to 45. N-block update soon.

– –W4SM for the AO-40 command team.

Klla: amsat

P lnken nedan finns det en frekvenskalkylator fr att berkna upp/nerfrekvenser fr Oscar 40. Det finns dels ett krbart program och ett Excel-ark.

AO-40 Frequency Calculator

Klla: Mirek Kasal, OK2AQK