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Re: FM Satellite Summary (October)



Bob,

you forget SEDSAT-1 SO33 is sending on 437.910 MHz, telemetry at 9600 bps
FSK, one packet every minute.

Regards.

Gustavo, LW2DTZ
----- Original Message -----
From: "Bob Bruninga" <bruninga@nadn.navy.mil>
To: <amsat-bb@AMSAT.Org>
Cc: "TAPR APRS Special Interest Group" <aprssig@tapr.org>
Sent: Monday, October 09, 2000 1:14 PM
Subject: [amsat-bb] FM Satellite Summary (October)


> Here is a one line summary of currently active FM birds that you can
> receive on your Mobile or HT FM rig and mobile vertical whip antenna.
>
>  1) SUNSAT in Mode B for APRS/UI and PARROT mode for voice to 10 Oct
>  2) MYSAT is a new signal on the air, but not enabled for user uplink
>
> SAT   DOWNLNK UPLINK  S MODE               COMMENTS
> ----  ------- ------- - ------------------ ----------------------------
> UO11  145.825         4 R FM Bell202 ASCII Telemetry only
> UO14  435.070 145.975 5 J FM Voice rptr    lots of fun every pass
> AO27  436.795 145.850 3 J FM Voice rptr    days only but fun
> SO35  145.825 436.290 8 B FM Voice rptr    One pass per day after 10 Oct
>       145.825 145.825 8 P FM VOICE PARROT  On through 10 Oct
> UO22  435.120 145.900 3 J 9600 bd FSK BBS  ON
> KO23  435.170 145.900 4 J 9600 bd FSK BBS  OFF&ON unreliably
> KO25  436.500 145.980 3 J 9600 bd FSK BBS  ON
> TO31  436.925 145.925 5 J 9600 bd FSK DATA ON downlinks images
> GO32  435.225         ? J 9600 bd FSK tlm  1 packet every 30 sec
> SO35  145.825 436.290 8 B 9600 bd FSK data ON all non voice passes
>                           1200 bd AFSK up  on the uplink is 7db better
> SO35  435.250 145.825 4 J 9600 bd FSK      ON after 10 Oct?
>               145.900 4 J 1200 bd AFSK up  ON after 10 Oct?
> MYSAT 437.325 TBD     ? J 9600 bd FSK data ON
>
> * If you dont hear it, then DONT TRANSMIT!  Check your gear...
>
> Between the hours of about 6 AM to noon and 6 PM to midnight local SUN
> time there is usually one of these birds in view for a few minutes to keep
> you entertained while traveling.  UHF requires +/- 5 or 10 KHz Doppler
> tuning.  The "S" column is a subjective signal strength assessment.  A
> 20" vertical whip in the center of your car roof  will give you success as
> shown below.  This acts as a 3/4 wave on UHF giving almost 8 dBi above
> 30 degrees over a good groundplane for the UHF downlink birds (for the
> cener 1/3rd of the pass).  For  SUNSAT which operates mode B with a
> stronger 2m downlink and your 50 watt mobile uplink, a normal dual-band
> mobile antenna will do better closer to the horizon.
>                                                 SIG RECEIVE RANGE
> USING THE 20" WHIP FOR MODE J PACSATS:          --- ------------------
> As a rough approximation consider this table     9  Horizon to Horizon
> which  I have subjectively  determined after     8  5  deg and above
> 3 months  of daily monitoring. Home stations     7  10 deg and above
> with 50' of RG 8  should subtract abt 3 from     6  15 deg and above
> the signals and 5/8  or dual band, or "gain"     5  20 deg and above
> antennas  should also subtract about 2.          4  25 deg and above
>                                                  3  30 deg and above
> The PACSATs  do not  officially digipeat  UI     2  3 ele beam required
> packets,  but  you can still  see status and     1  6 ele beam required
> telemetry and the USER lists on your Kenwood
> data radios or any radio with 9600 baud TNC.  For more info on mobile
> satellite operations see http://web.usna.navy.mil/~bruninga/astars.html
>
> NOTE:  The above assessments of the 20" whip were made with a .8 dB
> NF preamp and 150 feet of coax.  OPerating recently mobile with the THD7a
> Handheld barefoot with no preamp did show a decrease in the amount of pass
> coverage.  This is because the THD7a is optimized for the 440 band in the
> USA, not the 435 Band where it is a few dB down there.
>
> Errors, omissions, corrections welcome.  I will re-post this when ever I
> hear of changes in status.  For more detail, of course, read the AMSAT
> News Service bulletins and AMSAT WEB pages http://www.amsat.org
>
> de WB4APR, Bob
>
>
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