AMSAT-NAAMSAT News Service

June 17, 2001

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ISS Operations Continue

Students at the Henley Middle School in Klamath Falls, Oregon, enjoyed a voice contact with astronaut Susan Helms, KC7NHZ, aboard ISS recently. Using the NA1SS call sign, Helms answered a dozen questions from the students (several of whom are licensed amateurs) during the voice exchange. Many of the youngsters who listened to the contact also belong to the Klamath County Schools Amateur Radio Club, KC7VWW.

In addition to the school QSO, several stations have informed ANS of random contacts with the International Space Station.

The Henley Middle School contact was handled via the telebridge-equipped station of AMSAT member Tony Hutchison, VK5ZAI, in South Australia.

The Expedition-2 crew of Commander Yury Usachev and Flight Engineers Jim Voss and Susan Helms have now completed over 100 days in space since they were launched on March 8th.

Currently, the crew is performing a complete checkout of the station's robotic arm (Canadarm2). In addition, Yury Usachev and Jim Voss performed their first spacewalk around the ISS recently, completing all of their scheduled tasks smoothly and ahead of schedule. The two spacewalkers entered the small, spherical transfer compartment at the forward end of the Zvezda Service Module to begin the first spacewalk at the ISS without the presence of a shuttle.

The International Space Station is currently orbiting the Earth at an altitude of around 240 miles.

[ANS thanks NASA and the ARRL for this information]

OSCAR 11 Report

The OSCAR-11 satellite continues to orbit the Earth and provide useful information to many amateur radio satellite operators around the world. OSCAR-11 was launched in March 1984 by a Delta-Thor rocket from Vandenberg Air Force Base in California.

Clive, G3CWV, reported to ANS that it has been an uneventful time for OSCAR-11 during the period of May 15 to June 9, 2001, with good signals received from the 145.825 MHz FM (1200-baud AFSK) downlink and the mode-S beacon transmitting on 2401.500 MHz.

Battery voltage observed during daylight passes has continued to decrease. The average value observed was 13.3 volts with a range of 13.1 to 13.5 volts. The internal temperatures have continued to decrease, now -0.2 and -1.6 Celsius for battery and telemetry electronics respectively.

The magnetometer calibrations have steadily changed during the many years in orbit. Although the changes are small and are not noticeable on a plot of individual channels, they do have a considerable effect when the total magnetic field is calculated. The spin period has also varied, now between 300 and 344 seconds, with the attitude control working normally.

As noted above, the mode-S beacon is active, transmitting an unmodulated carrier. This beacon is a useful source for those testing mode-S converters for receiving AO-40.

OSCAR-11's operating schedule is unchanged:

ASCII status (210 seconds)
ASCII bulletin (60 seconds)
BINARY SEU (30 seconds)
ASCII TLM (90 seconds)
ASCII WOD (120 seconds)
ASCII bulletin (60 seconds)
BINARY ENG (30 seconds)

More information about OSCAR 11 can be found at http://www.users.zetnet.co.uk/clivew/

[ANS thanks Clive Wallis, G3CWV for this information]

ANS in Brief

ANS news in brief this week includes the following:

Weekly Satellite Report

Link to the weekly report on satellite ...

All Satellites
ISS . RS-12 . RS-13 . RS-15 . AO-10 . UO-11 . UO-14 . AO-16 . DO-17 . WO-18 . LO-19 . FO-20 . UO-22 . KO-23 . KO-25 . IO-26 . AO-27 . FO-29 . TO-31 . GO-32 . SO-33 . PO-34 . SO-35 . UO-36 . AO-40 . SO-41 . SO-42


Please send any amateur satellite news or reports to the ANS Editors at ans-editor@amsat.org, or to ANS Editor Dan James, NN0DJ, at nn0dj@amsat.org.

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This week's AMSAT News Service bulletins were edited by AMSAT  News Service editor Dan James, NN0DJ.

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