(Continued from previous message)
areas some 100 watts to a steerable azimuth/elevation  tracking  circularly
polarised ten element Yagi is  recommended  for  reliability  in  effective
communications. QSL's are via RW3DR QTHR.
                                        Pat Gowen,  G3IOR   15th May 1994
20442.SAT
       CHARACTERISTICS of LUSAT-OSCAR 19  (LO-19)
   This satellite is one of the family of the  MICROSATS  launched  by  ESA
from Kourou with the SPOT-II satellite in January  1990.  Antennas  as  for
those used for UO-14 (UoSAT-OSCAR-22) are recommended with  a  similar  145
MHz TX preferably with Varactor Drive. The 435 MHz SSB receiver needs to be
equipped with AFC.
   To demodulate the BPSK you will need a G3RUH FUJI BPSK Modem (or  others
for which please see WEBERSAT WO-18  etc)  and  a  modified  TNC  with  the
original Modem disconnected. The software and micro  requirements  are  the
same as those recommended for  U-O-14.
   Programs such as PG.EXE (for transmit  and  receive)  and  PB.EXE  (file
reception etc) are suitable using the recommended TNC settings of  FRACK  6
and MAXF 1
   Telemetry aquisition and  display  of  A-O-16,  18,  19  and  U-O-22  is
performed by 'DTLM.EXE' written  by  Jeff  ward,  G0/K8KA,  available  from
AMSAT-UK, London, E12 5EQ.
   A straight forward 70cm SSB/CW receiver is suitable for the CW TLM.
    FREQUENCIES used for LUSAT-OSCAR 19  (LO-19)
Uplinks             145.840, 145.860, 145.880, 145.900 MHz (AFSK/FM)
Downlink (PSK)      437.15355 MHz (BPSK/SSB)
Downlink (RC)       437.12580 MHz (BPSK/SSB)
CW Beacon           437.125 MHz (CW)
                                 Pat Gowen,  G3IOR   1 May 1992
14129.SAT
             Characteristics of AMSAT-OSCAR-10 (A-O-10)
   This satellite was the first  functional  AMSAT-DL  Phase-III  satellite
launched by ESA's ARIANE from French Guiana and placed by kick-motor firing
into a highly elliptical orbit with a 36,000  Km  Apogee  and  a  1,500  Km
Perigee. The period is some 10 hours. It has two transponders, but the  'U'
Mode 1269 MHz to 435 MHz transponder is no longer functional.  OSCAR-10  is
now on 435/145 MHz Mode 'B' continuously whilst the battery is well charged
by a favourable sun-angle.
   The Internal Housekeeping Unit has failed due to radiation damage,  thus
no transponder nor antenna switching is now possible. The  end-of-arm  beam
antennas are inoperative, only the monopole antennas being actoivated.  The
telemetry beacon has failed leaving only a plain carrier. The batteries are
aging, and due to no command capability remaining, the solar cells  can  no
longer be steered into sunlight. Thus, users are requested NOT to  use  the
transponder when poor regulation of the power  supply  is  demonstrated  by
FM'ing of the beacon signal.
   The uplink requirements for A-O-10 are accomplished by 25 - 50 watts  of
CW or LSB from any conventional 70cm TX to an azimuth/elevation  controlled
12 X/Y Yagi or 10 turn RHCP Helix. The  dowlink  requires  an  azimuth  and
elevation controlled 10 element RHCP Yagi or 8 turn Helix to  a  low  noise
pre-amplifier at the antenna feeding any USB 2m RX.
   Frequencies for AMSAT-OSCAR 10  (AO-10)
General Beacon      145.809 MHz (Unmodulated carrier)
Engineering Beacon  145.987 MHz (Switched off)
Mode B Uplink       435.030 - 435.180 MHz (SSB,CW)
Mode B Downlink     145.825 - 145.975 MHz (SSB,CW,inverting)
                                     Pat Gowen,   G3IOR   25 April 1992
cc: ALL
    ALL
    ALL
--- Intermail/RA/SX/GE
(1:369/8)
---------------