[amsat-bb] Re: HO-68 comments.

Mike Rupprecht mail at mike-rupprecht.de
Wed Jan 5 02:30:29 PST 2011

Hi Domenico,

The approach is excellent, but you forget the first link in the chain.
HO-68 was built and funded all alone by the Chinese. So they can also decide
alone whether and how long they offer a service for other radio amateurs.

Each transponder operates on a schedule will omit any region in the world.
This is quite the same way with satellites which have an low inclination
We are not entitled to the transponder but should be happy and grateful that
we can use it regularly. Unfortunately, the reality shows - if it is active
- it is far from optimal use ....

73, Mike

-----Ursprüngliche Nachricht-----
Von: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] Im
Auftrag von i8cvs
Gesendet: Tuesday, January 04, 2011 8:37 PM
An: la2qaa at amsat.org; Amsat - BBs
Cc: eu-amsat at yahoogroups.com
Betreff: [amsat-bb] Re: HO-68 comments.

----- Original Message -----
From: "John Hackett" <archie.hackett at hotmail.com>
To: <amsat-bb at amsat.org>
Cc: <eu-amsat at yahoogroups.com>
Sent: Tuesday, January 04, 2011 10:50 AM
Subject: [amsat-bb] HO-68 comments.
> Once again, I note the whinging about HO-68's orbit not being suitable for
a particular station ... or two.
> I'd like to remind the gentlemen concerned that HO-68's on time is NOT
designed to favour one particular area. Please remember, it's a Chinese
satellite and we should abide by and respect their decision of when to
activate the transponder.
> For my own use,the HO-68 late afternoon GMT 'on' times are optimum.
> Conversly, I 'could' complain about the ISS orbit - (but I don't) -only
'seeing it at max 6 degrees for 90 seconds every 2 days - (read: unworkable
from my QTH), dirro SO-50, AO-27 and VO-52.
> What may be poor for one operator could be optimum for another.
> Please remember, the world consists of more than The United States Of
America and Southern Europe.
> 73 John.   <la2qaa at amsat.org>
Hi John, LA2QAA

I don't agree with you because there are many and many HO-68 orbits with the
satellite transponder OFF despite the elevation is very hight for South
Europe and North Europe i.e. for you and for me as well for South USA and
North USA

The problem is that in the above orbits HO-68 cannot be very well monitored
by the only one command station in China and they prefere to switch OFF the

The pobleme is that the Chinese HO-68 should have more  control stations
around the the world instead of only one in China.The roule is that many
control station are needed for a LEO satellites and only two or maximum tree
for a HEO satellite.

Same problem arise with JAMSAT with only one control station in Japan for

AMSAT China and AMSAT Japan  don't like to share the command of their
satellites with AMSAT's command stations in different continents.

Conversly you should remember that in the early 1974 AMSAT had control
stations for OSCAR-6 in USA ,in North Africa (Algeria) and Australia
so that the satellite was continuously monitored and during all orbits it
was operational.

I abandoned HO-68 for the better and reliable as well in all orbits
available transponder of VO-52

73" de

i8CVS Domenico

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