[AGCW] Mars Beacon in CW

Thu, 28 Aug 2003 18:31:54 -0100

Hallo!
gerade in einer anderen Mailingliste gelesen,

just for info ..hi

73, Tom - DL8AAM

>Date: Thu, 28 Aug 2003 09:49:54 -0400
>From: "Andrew Robins" <[email protected]>
>To: <[email protected]>
>Subject: [ndblist] GEN-Martian Beacon
>
>NDB List Information Page:
>http://www.beaconworld.org.uk/info.htm
>
>Hi All:
>
>Got this item from our local amateur radio reflector. If anyone
>hears it, a one-watt beacon from Mars would be "serious DX," even if
>that planet is now exceptionally close to ours (I observed Mars last
>night and could easily see its disc in 16x80 binoculars).
>
>73,
>
>Andy Robins KB8QGF
>Kalamazoo, Michigan USA
>
>
>Mars Relay transmitter test set (Aug 27, 2003) -- Until August 29
>NASA's Jet Propulsion Laboratory (JPL)--in cooperation with the
>Stanford Research Institute (SRI)--will conduct a test of the Mars
>Relay transmitter aboard the Mars Global Surveyor (MGS) spacecraft
>now orbiting Mars. During the test, the spacecraft will transmitting
>a 1 W CW signal on 437.1 MHz for reception by the 46 meter dish at
>SRI. Amateurs with 70 cm EME-class stations using DSP techniques
>also may be able to detect this signal. ARRL member Andrew Bachler,
>N9AB, in Illinois was able to detect a similar transmitter aboard
>Mars Odyssey while it was on its way to Mars in June 2001 (see also,
>"New solar system record set"). This test will be somewhat more
>challenging as MGS will be 3 times further away. "MGS will be
>entering and exiting occultation--blockage by Mars with respect to
>Earth--with each 118-minute orbit," says John Callas of JPL.
>"Furthermore, its UHF antenna--with about 0 dBi of gain, EIRP ~30
>dBm--will only be viewable from Earth for a few minutes just before
>ingress and just after egress as it orbits." Callas says the viewing
>window is between five and 15 minutes. Details of the test timeline
>are available on the KM1P Welcome Page. Antenna pointing information
>can be generated with JPL's HORIZONS system. Announcements and
>discussions are available on the mars-net e-mail reflector. To join
>the list, send a message to [email protected] with the words
>"subscribe mars-net" in the body of the message. The SETI League
>will issue a special extraterrestrial QSL card for documented
>successful reception of either Mars spacecraft beacon. 
>
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>