Satgen 43 Satellite Sixpack Launch
Launched on Monday 22nd Jan 90, all six microsats have been heard in UK.
The following is a summary of the rough orbit data , and the individual
performances in the first 36 hours.
Very Crude Keplerian Elements are Epoch 90 22.0786319 : Inc 98.7376
Mean Anom 297.18 : Mean Motion 14.2688896 : Ecc .001338 : Arg of perigee
110.95 : Right Ascension 102.95582 . All six appear roughly together
UK orbits were difficult to judge on 22nd because of Aurora. Polar passes
1354, 1533 , 1711 were badly cut up,but subsequent orbits have been better
NA Pacsat is signing PACSAT-1 sending clear printable copy , but deep
fading makes narrow beam aerials essential. Gear used for good copy 21
ele 70cm beam or 48 element multibeam with AzEl control. Omni and colinear
unable to cope with fades.Rx ICOM 451, Fuji modem modified TNC 320
PACSAT-1>STATUS : 00 00 00 7B B0 18 33 02 00 80 00 00 B0 00 00 00 00
00 00 00 Using both 437.05 and 437.025 MHz 1200bps BPSK
LUSAT is signing LUSAT-1>STATUS 00 00 00 7C B0 18 22 02 00 00 00 00
B0 00 00 00 00 00 00 00 . Aerial and Rx as for Pacsat. Morse beacon very
easy to read, is on 437.125, digital is on 437.15 MHz 1200bps BPSK
Webersat has not yet been properly checked.
Uosat D and E are slightly better reception than Pacsat. They are using
435.07 and 435.12 MHz . Have not printed this signal. It is very different
in format from the others and details are not known.
Dove is clearly a tremendous satellite. With Lusat with its easy morse
beacon these two are the best of the bunch for the space listener. I found
that Dove's 145.827 MHz 1200 bps FSK can be fed straight into the receive
plug I use to feed the terrestrial 2m Terminal Node Controller. No Modem
is necessary. GM4JJJ got V Good print using an omni aerial on his 2m Rx.
Summary A superb start. Lusat and Pacsat were readable on their first
orbit passed UK. More information is needed on Uosat operating formats.
Dove is an absolute winner. The space listeners approach to satellite
packet telemetry. But there is one delightful warning - It eats printout
paper , a wall to wall pass consumes a lot of fanfold. Lusats 435.122
beacon telemetry is an excellent simple introduction to 70cm listening and
it is a superb indicator of UHF propagation between Lusat and your
station. I had taken my Auroral radar warning Rx 153.2 MHz, and retuned it
to 437.122, but Lusat signals revealed the presence of the disturbed Polar
Front at 22/1215ut long before the Aurora got strong enough to support 2m.
Congratulations to all. Remember JAS1-B 1st Feb. 73 de GM4IHJ@GB7MAC