Category: Ham Satellite news

Frsken med dual-hopp packet mellan ISS och PcSat blev lyckat. Ls nedan en del av bulletinen frn ANS. Om du vill lsa om hela frsket, g d till ANS hemsida:
http://www.amsat.org/amsat/news/ans.html

AMSAT News Service Bulletin 293.03 From AMSAT HQ
SILVER SPRING, MD. October 20, 2003
To All RADIO AMATEURS
BID: $ANS-293.03

Last week a short-term test of the ISS packet system operating as one of
the nodes in a dual-hop, satellite to satellite constellation with PCsat
was announced. This meant that the ISS packet system would be temporarily
moved from its usual 145.800 MHz split-mode frequency to the 145.825 MHz
simplex frequency of the PCsat digipeater so that the two satellites could
operate together. The objective of the test has been to see if the satel-
lites can be used to relay packets from each other to extend the range via
a dual-digipeat hop.

When the test was first announced the precise scheduling was hard to
predict.
However, on Friday evening USA time (11 October) when ISS first came onto
145.825 and while it was 180 degrees out of phase with PCsat, those people
sitting on 145.825 were greeted with almost 10 hours straight of almost 14
satellite passes averaging every 45 minutes or so. Bob Bruninga WB4APR
said,
It was a busy night. Seems like I couldnt get anything much done, because
there was always another pass just coming up, or just having ended.

Bob also commented about the future, With only two satellites flying in
constellation on the same frequency with the same generic UI digipeating
mission, we were getting a sample of what I hope to show as the future of
UI digipeating in space. That is, if we can get some of those contemplating
the construction of a LEO satellite to include a UI digipeater on 145.825,
then we would have an amateur radio satellite system capable of on average
providing communications support to mobiles and handheld operators anywhere
on the planet at least once every 15 minutes or so around the clock.

This test has been able to report several dual-hop digipeat successes. On a
pass of ISS over USA with PCsat almost directly 500 miles overhead of ISS
over Newfoundland dual-hop packets were copied that looked like this:

[15:56:16] KB1GVR CQ,RS0ISS*,W3ADO-1/1:=4436.18N/06826.92W-QSL TEST
[15:56:46] WB4APR APRS,RS0ISS*,W3ADO-1,ARISS/1::ALL :TEST in progress

The dual-hop packets went both ways as this copy shows:

[15:56:23] KB2M-3 SYQQ0W,W3ADO-1*,RS0ISS/1: http://www.qsl.net/kb2m
–

Klla: ANS

Hej Satellitintressenter! hr kommer litet klipp frn ntet,

Fr vrigt s r RS 12 fortfarande tyst och det kanske r s illa att den skadats av solens aktivitet.

AO10 r fortfarande tyst
AO27 har varit igng.
UO14 kr dom fr fullt.

FO20, FO29 r fina satelliter med fr lite aktiva.
AO7 gr otroligt starkt och jag fljde den nda till 4500 km avstnd.

73 Hkan SM7WSJ

AO40
When the ALON/ALAT significantly alters, the M-blk gets modified and also posted here.There has been no significant change in ALON/ALAT from the last posting.

However, we are shortly about to raise ALAT quite a bit, followed by about 3 weeks of drifting past the sun. During this time, the squints will be poor, as will the solar angles. The transponders may be off for much of this time because of the poor conditions and to conserve power. At the end of that time, ALON will be ~335 degs, we will be able to lower ALAT to 0, restore transponder usage, and have some steady improvement over current conditions. By about November 15th, if all goes well, we should be back to ALON/ALAT = 0/0/, where we can stay for ~3 months. More details will follow in a few days.

Klla: Hkan SM7WSJ