Category: Ham Satellite news

Det kommer många nya Cubesats, kontinuerligt under hela året. Här är några av de senaste plus kommande:

Nya:

• D-STAR ONE Uppskjuten 2018-12-27:
  D-Star ONE Sparrow operates as a half duplex repeater:
  Callsign:  DP1GOS
  Uplink:    437.325 MHz
  Downlink:  435.525 MHz RF-Power: 800-1200 mW
  Telemetry: 435.700 MHz 4k8 GMSK Mobitex (CMX990 Mobitex Format)
  
  The telemetry format is documented at:
  http://tinyurl.com/ANS-006-DSTAR-ONE-Telemetry
  A telemetry decoder is available at:
  http://www.dk3wn.info/p/?page_id=29535
  
  Technical details for radio amateurs is posted at:
  http://tinyurl.com/ANS-006-DSTAR-ONE-Amateur
• PW-Sat2 Uppskjuten 2018-12-29:
• Amateur radio operators are invited to take part in this mission.
  Dashboard software to receive, decode and upload PW-Sat2 frames
  to the PW-Sat2 cloud is available on their website:
  https://radio.pw-sat.pl/
  
  The team has posted additional information at:
  https://github.com/PW-Sat2/HAMRadio/wiki
  
  PW-Sat2 transmits on 435.275 MHz using 1k2 and 9k6 BPSK AX25.

Kommande:

• JAMSAT NEXUS Planerad till 2019-01-17:
  The NEXUS cubesat will:
  + Provide amateur radio communications via the 145/435 MHz
    transponder and SSTV
  + Download pictures from the 640×480 pixel camera
  + Operate the data downlink at 38400 bps QPSK
  + Compare the performance of the data downlink when using AFSK,
    GMSK and QPSK modes
  
  NEXUS will be launched from the JAXA Uchinoura Space Center located in
  Kagoshima Prefecture on January 17, 2019 (JST) aboard an Epsilon rocket
  together with OrigamiSat-1 and AOBA-Velox-IV into a 500 km sun sync-
  hronous orbit.
  
  Linear transponder
  ——————
  Uplink:   145.900-145.930 MHz (CW/LSB)
  Downlink: 435.880-435.910 MHz (CW/USB)
  CW/Data:  435.900 MHz & 437.075 MHz
  Callsign: JS1YAV
  
  Separation from the rocket is planned for T + 4100 seconds after
  launch at which time NEXUS will be powered on. CW telemetry infor-
  mation will commence transmission 16 minutes, 40 seconds following
  power up.
  
  The NEXUS team has posted a PDF document in English describing the
  planned initial operations, telemetry format, and preliminary TLEs
  at: http://tinyurl.com/ANS-006-Nexus-Initial-Ops
  
  NEXUS website in Google English
  http://tinyurl.com/NEXUS-Satellite
  
  NEXUS Blog
  http://tinyurl.com/NEXUS-Sat-Blog
  
  JAMSAT in Google English
  http://tinyurl.com/JAMSAT
  
  Read the AMSAT-UK posting at:
  https://amsat-uk.org/2014/08/24/nexus-cubesat-mode-j-transponder/

Den stora radiomässan / loppis i Eskilstuna hålls detta år (2019) lördag 30 mars. Läs mer på:
http://www.sk5lw.com/wp/radiomassa/

AO-85 har numera kända problem med sina batterier. Ibland är spänningen nere mot 2.8V vilket tydligen är en mycket låg och riskabel nivå för batteriernas överlevnad.
Just nu är därför både IHU (omborddatorn) och sändaren avslagna. Fullständig rapport från KO4MA kommer här:

Drew Glasbrenner, KO4MA, Vice-President Operations published the
following on AO-85’s status as of December 19, 2018:

“As you probably know, AO-85 has had issues recently with the
batteries dropping precariously low during eclipse. We think it’s
likely the batteries suffered degradation due to heat during previous
periods of no eclipses. This has made it difficult to keep the
satellite available for use without endangering the batteries. Today
the nominally 3.6v pack was down to 2.8v at the end of the eclipse.
That is dangerously low.

“In an effort to extend the useable life of the satellite, this
evening we turned both the IHU and the transmitter off. This ceases
all transmissions, including the beacons every two minutes in both
sunlit and eclipsed parts of the orbit. We will periodically turn
the satellite back on for an orbit or two, in order to gather
telemetry. If all goes as planned, we will turn the repeater back on
during the next period of no eclipses beginning around January 24th.

“In the meantime, it is important to leave AO-85 tracked in your
FoxTelem setups, in order for us to gather telemetry and keep tabs
on the situation. If you do happen to hear a Veronica beacon, or
either the normal repeater or the COR/no telemetry repeater, please
let the list know, or send me an email or message directly.

“We appreciate your understanding and cooperation as we try to make
the most of the situation. Please consider supporting the AMSAT
GOLF project with your membership, and one-time or recurring
donations at:
https://www.amsat.org/product-category/amsat-membership/
or
https://www.amsat.org/donate/”

[ANS thanks Drew Glasbrenner, KO4MA for the above information.]

Satelliten UWE-4 har kommit upp den 27 december 2018. Tidigare UWE-satelliter har varit kända för deras starka beacon på 70 cm.
Den har redan tagits emot på 437.385 MHz FM med 9k6 FSK. Decoder finns hos DK3WN.

Not so good news from ANS:

Following the launch of Fox-1Cliff/AO-95 AMSAT Engineering began the
commissioning process, with the help of AMSAT Operations, on Tuesday
December 4.  Satellite telemetry indicates that the bird is healthy,
and I thank all of the stations who have captured and relayed the
telemetry that enabled us to monitor and determine the health of the
various systems on board.  Fox-1Cliff required an extended period
monitoring battery and power levels due to the anomaly and fix that
was applied back in February of 2016 during environmental testing,
and the result of that is positive.

However, during the next steps of commissioning we discovered an
anomaly with her receive capability.  After a few days of tests,
analysis, and discussion, it appears that Fox-1Cliff/AO-95 will not
be commissioned as our fourth Fox-1 amateur radio satellite.

AMSAT Engineering will continue to evaluate and test Fox-1Cliff/AO-
95 for solutions to the anomaly and your continued help in providing
telemetry is appreciated so that we can have data throughout her
daily orbits rather than limited data over our U.S. stations.  The
data, analysis, and testing could lead to a positive solution but at
the very least will be important to AMSAT's satellite programs in
providing information that would help us and others, as we do freely
share our successes and failures, to avoid similar situations with
future missions.

I would like to thank all of the AMSAT Fox Engineering volunteers
who made Fox-1Cliff possible and continue to build our new
satellites, becoming even better as we move forward.

I will provide more information on the anomaly and any determination
we make regarding the possible cause or causes as well as information
on the possibility of recovery, over time.  Please be patient
regarding that.  Many of you have probably built a project and had to
troubleshoot it on your bench, we are in a troubleshooting situation
here with the additional challenge of being 600 km away from our
bench.

[ANS thanks Jerry Buxton, N0JY, AMSAT Vice President of Engineering
for the above information]

I och med den senaste uppskjutningen med bla. Fox-1Cliff har vi fått tre nya Oscar-satelliter:

• Fox-1Cliff heter nu även AMSAT-OSCAR 95 (AO-95)
• ExseedSat heter nu även VUsat-OSCAR 96 (VO-96)
• JY1Sat heter nu Jordan-OSCAR 97 (JO-97)

Vilken satellit kommer få Oscar nummer 100?

Källa: ANS