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FM - APRS Satellites
> Could someone please provide me a list of FM Satellites and a listing
> of Satelites capable of being used in the APRS mode and the Baud rate.
Here is a one line summary of currently active FM birds that
you can receive on your Mobile FM rig and mobile vertical whip antenna.
Two new items of significance:
1) SUNSAT now operates APRS digipeating on all non-voice sked passes!
2) Kenwood announced an upgrade to THD7 HT to rec/display 9600 baud
APRS. THus it can monitor these satellite downlinks in your hand.
SAT DOWNLNK UPLINK S MODE COMMENTS
---- ------- ------- - ------------------ ----------------------------
MIR 145.985 145.985 9 S FM crew voice Voice and SSTV activity rptd
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 on scheduled passes only
SO35 145.825 436.290 8 B 9600 bd FSK digi APRS on non-voice passes
UO22 435.120 145.900 3 J 9600 bd FSK BBS ON
KO23 435.170 145.900 4 J 9600 bd FSK BBS ON but with probs in eclipse
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
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
SUNSAT which operates mode B with a stronger 2m downlink and your 50 watt
mobile uplink, your 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 currently 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
NOTES: Miles Mann reports Cosmonauts sleep between 1900z to 0400z.
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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